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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<FONT color="green">003</FONT>     * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<FONT color="green">004</FONT>     * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<FONT color="green">005</FONT>     * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<FONT color="green">006</FONT>     * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<FONT color="green">007</FONT>     * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<FONT color="green">008</FONT>     *<a name="line.8"></a>
<FONT color="green">009</FONT>     *      http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<FONT color="green">010</FONT>     *<a name="line.10"></a>
<FONT color="green">011</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<FONT color="green">012</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<FONT color="green">013</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<FONT color="green">014</FONT>     * See the License for the specific language governing permissions and<a name="line.14"></a>
<FONT color="green">015</FONT>     * limitations under the License.<a name="line.15"></a>
<FONT color="green">016</FONT>     */<a name="line.16"></a>
<FONT color="green">017</FONT>    package org.apache.commons.jexl2;<a name="line.17"></a>
<FONT color="green">018</FONT>    <a name="line.18"></a>
<FONT color="green">019</FONT>    import java.io.BufferedReader;<a name="line.19"></a>
<FONT color="green">020</FONT>    import java.io.File;<a name="line.20"></a>
<FONT color="green">021</FONT>    import java.io.FileReader;<a name="line.21"></a>
<FONT color="green">022</FONT>    import java.io.IOException;<a name="line.22"></a>
<FONT color="green">023</FONT>    import java.io.InputStreamReader;<a name="line.23"></a>
<FONT color="green">024</FONT>    import java.io.StringReader;<a name="line.24"></a>
<FONT color="green">025</FONT>    import java.io.Reader;<a name="line.25"></a>
<FONT color="green">026</FONT>    import java.net.URL;<a name="line.26"></a>
<FONT color="green">027</FONT>    import java.net.URLConnection;<a name="line.27"></a>
<FONT color="green">028</FONT>    import java.lang.ref.SoftReference;<a name="line.28"></a>
<FONT color="green">029</FONT>    import java.util.ArrayList;<a name="line.29"></a>
<FONT color="green">030</FONT>    import java.util.Map;<a name="line.30"></a>
<FONT color="green">031</FONT>    import java.util.Set;<a name="line.31"></a>
<FONT color="green">032</FONT>    import java.util.Collections;<a name="line.32"></a>
<FONT color="green">033</FONT>    import java.util.LinkedHashMap;<a name="line.33"></a>
<FONT color="green">034</FONT>    import java.util.LinkedHashSet;<a name="line.34"></a>
<FONT color="green">035</FONT>    import java.util.List;<a name="line.35"></a>
<FONT color="green">036</FONT>    import java.util.Map.Entry;<a name="line.36"></a>
<FONT color="green">037</FONT>    import org.apache.commons.logging.Log;<a name="line.37"></a>
<FONT color="green">038</FONT>    import org.apache.commons.logging.LogFactory;<a name="line.38"></a>
<FONT color="green">039</FONT>    <a name="line.39"></a>
<FONT color="green">040</FONT>    import org.apache.commons.jexl2.parser.ParseException;<a name="line.40"></a>
<FONT color="green">041</FONT>    import org.apache.commons.jexl2.parser.Parser;<a name="line.41"></a>
<FONT color="green">042</FONT>    import org.apache.commons.jexl2.parser.JexlNode;<a name="line.42"></a>
<FONT color="green">043</FONT>    import org.apache.commons.jexl2.parser.TokenMgrError;<a name="line.43"></a>
<FONT color="green">044</FONT>    import org.apache.commons.jexl2.parser.ASTJexlScript;<a name="line.44"></a>
<FONT color="green">045</FONT>    <a name="line.45"></a>
<FONT color="green">046</FONT>    import org.apache.commons.jexl2.introspection.Uberspect;<a name="line.46"></a>
<FONT color="green">047</FONT>    import org.apache.commons.jexl2.introspection.UberspectImpl;<a name="line.47"></a>
<FONT color="green">048</FONT>    import org.apache.commons.jexl2.introspection.JexlMethod;<a name="line.48"></a>
<FONT color="green">049</FONT>    import org.apache.commons.jexl2.parser.ASTArrayAccess;<a name="line.49"></a>
<FONT color="green">050</FONT>    import org.apache.commons.jexl2.parser.ASTIdentifier;<a name="line.50"></a>
<FONT color="green">051</FONT>    import org.apache.commons.jexl2.parser.ASTReference;<a name="line.51"></a>
<FONT color="green">052</FONT>    <a name="line.52"></a>
<FONT color="green">053</FONT>    /**<a name="line.53"></a>
<FONT color="green">054</FONT>     * &lt;p&gt;<a name="line.54"></a>
<FONT color="green">055</FONT>     * Creates and evaluates Expression and Script objects.<a name="line.55"></a>
<FONT color="green">056</FONT>     * Determines the behavior of Expressions &amp; Scripts during their evaluation with respect to:<a name="line.56"></a>
<FONT color="green">057</FONT>     * &lt;ul&gt;<a name="line.57"></a>
<FONT color="green">058</FONT>     *  &lt;li&gt;Introspection, see {@link Uberspect}&lt;/li&gt;<a name="line.58"></a>
<FONT color="green">059</FONT>     *  &lt;li&gt;Arithmetic &amp; comparison, see {@link JexlArithmetic}&lt;/li&gt;<a name="line.59"></a>
<FONT color="green">060</FONT>     *  &lt;li&gt;Error reporting&lt;/li&gt;<a name="line.60"></a>
<FONT color="green">061</FONT>     *  &lt;li&gt;Logging&lt;/li&gt;<a name="line.61"></a>
<FONT color="green">062</FONT>     * &lt;/ul&gt;<a name="line.62"></a>
<FONT color="green">063</FONT>     * &lt;/p&gt;<a name="line.63"></a>
<FONT color="green">064</FONT>     * &lt;p&gt;The &lt;code&gt;setSilent&lt;/code&gt; and &lt;code&gt;setLenient&lt;/code&gt; methods allow to fine-tune an engine instance behavior<a name="line.64"></a>
<FONT color="green">065</FONT>     * according to various error control needs. The lenient/strict flag tells the engine when and if null as operand is<a name="line.65"></a>
<FONT color="green">066</FONT>     * considered an error, the silent/verbose flag tells the engine what to do with the error<a name="line.66"></a>
<FONT color="green">067</FONT>     * (log as warning or throw exception).<a name="line.67"></a>
<FONT color="green">068</FONT>     * &lt;/p&gt;<a name="line.68"></a>
<FONT color="green">069</FONT>     * &lt;ul&gt;<a name="line.69"></a>
<FONT color="green">070</FONT>     * &lt;li&gt;When "silent" &amp;amp; "lenient":<a name="line.70"></a>
<FONT color="green">071</FONT>     * &lt;p&gt; 0 &amp; null should be indicators of "default" values so that even in an case of error,<a name="line.71"></a>
<FONT color="green">072</FONT>     * something meaningfull can still be inferred; may be convenient for configurations.<a name="line.72"></a>
<FONT color="green">073</FONT>     * &lt;/p&gt;<a name="line.73"></a>
<FONT color="green">074</FONT>     * &lt;/li&gt;<a name="line.74"></a>
<FONT color="green">075</FONT>     * &lt;li&gt;When "silent" &amp;amp; "strict":<a name="line.75"></a>
<FONT color="green">076</FONT>     * &lt;p&gt;One should probably consider using null as an error case - ie, every object<a name="line.76"></a>
<FONT color="green">077</FONT>     * manipulated by JEXL should be valued; the ternary operator, especially the '?:' form<a name="line.77"></a>
<FONT color="green">078</FONT>     * can be used to workaround exceptional cases.<a name="line.78"></a>
<FONT color="green">079</FONT>     * Use case could be configuration with no implicit values or defaults.<a name="line.79"></a>
<FONT color="green">080</FONT>     * &lt;/p&gt;<a name="line.80"></a>
<FONT color="green">081</FONT>     * &lt;/li&gt;<a name="line.81"></a>
<FONT color="green">082</FONT>     * &lt;li&gt;When "verbose" &amp;amp; "lenient":<a name="line.82"></a>
<FONT color="green">083</FONT>     * &lt;p&gt;The error control grain is roughly on par with JEXL 1.0&lt;/p&gt;<a name="line.83"></a>
<FONT color="green">084</FONT>     * &lt;/li&gt;<a name="line.84"></a>
<FONT color="green">085</FONT>     * &lt;li&gt;When "verbose" &amp;amp; "strict":<a name="line.85"></a>
<FONT color="green">086</FONT>     * &lt;p&gt;The finest error control grain is obtained; it is the closest to Java code -<a name="line.86"></a>
<FONT color="green">087</FONT>     * still augmented by "script" capabilities regarding automated conversions &amp; type matching.<a name="line.87"></a>
<FONT color="green">088</FONT>     * &lt;/p&gt;<a name="line.88"></a>
<FONT color="green">089</FONT>     * &lt;/li&gt;<a name="line.89"></a>
<FONT color="green">090</FONT>     * &lt;/ul&gt;<a name="line.90"></a>
<FONT color="green">091</FONT>     * &lt;p&gt;<a name="line.91"></a>
<FONT color="green">092</FONT>     * Note that methods that evaluate expressions may throw &lt;em&gt;unchecked&lt;/em&gt; exceptions;<a name="line.92"></a>
<FONT color="green">093</FONT>     * The {@link JexlException} are thrown in "non-silent" mode but since these are<a name="line.93"></a>
<FONT color="green">094</FONT>     * RuntimeException, user-code &lt;em&gt;should&lt;/em&gt; catch them wherever most appropriate.<a name="line.94"></a>
<FONT color="green">095</FONT>     * &lt;/p&gt;<a name="line.95"></a>
<FONT color="green">096</FONT>     * @since 2.0<a name="line.96"></a>
<FONT color="green">097</FONT>     */<a name="line.97"></a>
<FONT color="green">098</FONT>    public class JexlEngine {<a name="line.98"></a>
<FONT color="green">099</FONT>        /**<a name="line.99"></a>
<FONT color="green">100</FONT>         * An empty/static/non-mutable JexlContext used instead of null context.<a name="line.100"></a>
<FONT color="green">101</FONT>         */<a name="line.101"></a>
<FONT color="green">102</FONT>        public static final JexlContext EMPTY_CONTEXT = new JexlContext() {<a name="line.102"></a>
<FONT color="green">103</FONT>            /** {@inheritDoc} */<a name="line.103"></a>
<FONT color="green">104</FONT>            public Object get(String name) {<a name="line.104"></a>
<FONT color="green">105</FONT>                return null;<a name="line.105"></a>
<FONT color="green">106</FONT>            }<a name="line.106"></a>
<FONT color="green">107</FONT>    <a name="line.107"></a>
<FONT color="green">108</FONT>            /** {@inheritDoc} */<a name="line.108"></a>
<FONT color="green">109</FONT>            public boolean has(String name) {<a name="line.109"></a>
<FONT color="green">110</FONT>                return false;<a name="line.110"></a>
<FONT color="green">111</FONT>            }<a name="line.111"></a>
<FONT color="green">112</FONT>    <a name="line.112"></a>
<FONT color="green">113</FONT>            /** {@inheritDoc} */<a name="line.113"></a>
<FONT color="green">114</FONT>            public void set(String name, Object value) {<a name="line.114"></a>
<FONT color="green">115</FONT>                throw new UnsupportedOperationException("Not supported in void context.");<a name="line.115"></a>
<FONT color="green">116</FONT>            }<a name="line.116"></a>
<FONT color="green">117</FONT>        };<a name="line.117"></a>
<FONT color="green">118</FONT>    <a name="line.118"></a>
<FONT color="green">119</FONT>        /**<a name="line.119"></a>
<FONT color="green">120</FONT>         *  Gets the default instance of Uberspect.<a name="line.120"></a>
<FONT color="green">121</FONT>         * &lt;p&gt;This is lazily initialized to avoid building a default instance if there<a name="line.121"></a>
<FONT color="green">122</FONT>         * is no use for it. The main reason for not using the default Uberspect instance is to<a name="line.122"></a>
<FONT color="green">123</FONT>         * be able to use a (low level) introspector created with a given logger<a name="line.123"></a>
<FONT color="green">124</FONT>         * instead of the default one.&lt;/p&gt;<a name="line.124"></a>
<FONT color="green">125</FONT>         * &lt;p&gt;Implemented as on demand holder idiom.&lt;/p&gt;<a name="line.125"></a>
<FONT color="green">126</FONT>         */<a name="line.126"></a>
<FONT color="green">127</FONT>        private static final class UberspectHolder {<a name="line.127"></a>
<FONT color="green">128</FONT>            /** The default uberspector that handles all introspection patterns. */<a name="line.128"></a>
<FONT color="green">129</FONT>            private static final Uberspect UBERSPECT = new UberspectImpl(LogFactory.getLog(JexlEngine.class));<a name="line.129"></a>
<FONT color="green">130</FONT>    <a name="line.130"></a>
<FONT color="green">131</FONT>            /** Non-instantiable. */<a name="line.131"></a>
<FONT color="green">132</FONT>            private UberspectHolder() {<a name="line.132"></a>
<FONT color="green">133</FONT>            }<a name="line.133"></a>
<FONT color="green">134</FONT>        }<a name="line.134"></a>
<FONT color="green">135</FONT>        /**<a name="line.135"></a>
<FONT color="green">136</FONT>         * The Uberspect instance.<a name="line.136"></a>
<FONT color="green">137</FONT>         */<a name="line.137"></a>
<FONT color="green">138</FONT>        protected final Uberspect uberspect;<a name="line.138"></a>
<FONT color="green">139</FONT>        /**<a name="line.139"></a>
<FONT color="green">140</FONT>         * The JexlArithmetic instance.<a name="line.140"></a>
<FONT color="green">141</FONT>         */<a name="line.141"></a>
<FONT color="green">142</FONT>        protected final JexlArithmetic arithmetic;<a name="line.142"></a>
<FONT color="green">143</FONT>        /**<a name="line.143"></a>
<FONT color="green">144</FONT>         * The Log to which all JexlEngine messages will be logged.<a name="line.144"></a>
<FONT color="green">145</FONT>         */<a name="line.145"></a>
<FONT color="green">146</FONT>        protected final Log logger;<a name="line.146"></a>
<FONT color="green">147</FONT>        /**<a name="line.147"></a>
<FONT color="green">148</FONT>         * The singleton ExpressionFactory also holds a single instance of<a name="line.148"></a>
<FONT color="green">149</FONT>         * {@link Parser}.<a name="line.149"></a>
<FONT color="green">150</FONT>         * When parsing expressions, ExpressionFactory synchronizes on Parser.<a name="line.150"></a>
<FONT color="green">151</FONT>         */<a name="line.151"></a>
<FONT color="green">152</FONT>        protected final Parser parser = new Parser(new StringReader(";")); //$NON-NLS-1$<a name="line.152"></a>
<FONT color="green">153</FONT>        /**<a name="line.153"></a>
<FONT color="green">154</FONT>         * Whether expressions evaluated by this engine will throw exceptions (false) or <a name="line.154"></a>
<FONT color="green">155</FONT>         * return null (true) on errors. Default is false.<a name="line.155"></a>
<FONT color="green">156</FONT>         */<a name="line.156"></a>
<FONT color="green">157</FONT>        // TODO could this be private?<a name="line.157"></a>
<FONT color="green">158</FONT>        protected volatile boolean silent = false;<a name="line.158"></a>
<FONT color="green">159</FONT>        /**<a name="line.159"></a>
<FONT color="green">160</FONT>         * Whether error messages will carry debugging information.<a name="line.160"></a>
<FONT color="green">161</FONT>         */<a name="line.161"></a>
<FONT color="green">162</FONT>        // TODO could this be private?<a name="line.162"></a>
<FONT color="green">163</FONT>        protected volatile boolean debug = true;<a name="line.163"></a>
<FONT color="green">164</FONT>        /**<a name="line.164"></a>
<FONT color="green">165</FONT>         *  The map of 'prefix:function' to object implementing the functions.<a name="line.165"></a>
<FONT color="green">166</FONT>         */<a name="line.166"></a>
<FONT color="green">167</FONT>        // TODO this could probably be private; is it threadsafe?<a name="line.167"></a>
<FONT color="green">168</FONT>        protected Map&lt;String, Object&gt; functions = Collections.emptyMap();<a name="line.168"></a>
<FONT color="green">169</FONT>        /**<a name="line.169"></a>
<FONT color="green">170</FONT>         * The expression cache.<a name="line.170"></a>
<FONT color="green">171</FONT>         */<a name="line.171"></a>
<FONT color="green">172</FONT>        // TODO is this thread-safe? Could it be made private?<a name="line.172"></a>
<FONT color="green">173</FONT>        protected SoftCache&lt;String, ASTJexlScript&gt; cache = null;<a name="line.173"></a>
<FONT color="green">174</FONT>        /**<a name="line.174"></a>
<FONT color="green">175</FONT>         * The default cache load factor.<a name="line.175"></a>
<FONT color="green">176</FONT>         */<a name="line.176"></a>
<FONT color="green">177</FONT>        private static final float LOAD_FACTOR = 0.75f;<a name="line.177"></a>
<FONT color="green">178</FONT>    <a name="line.178"></a>
<FONT color="green">179</FONT>        /**<a name="line.179"></a>
<FONT color="green">180</FONT>         * Creates an engine with default arguments.<a name="line.180"></a>
<FONT color="green">181</FONT>         */<a name="line.181"></a>
<FONT color="green">182</FONT>        public JexlEngine() {<a name="line.182"></a>
<FONT color="green">183</FONT>            this(null, null, null, null);<a name="line.183"></a>
<FONT color="green">184</FONT>        }<a name="line.184"></a>
<FONT color="green">185</FONT>    <a name="line.185"></a>
<FONT color="green">186</FONT>        /**<a name="line.186"></a>
<FONT color="green">187</FONT>         * Creates a JEXL engine using the provided {@link Uberspect}, (@link JexlArithmetic),<a name="line.187"></a>
<FONT color="green">188</FONT>         * a function map and logger.<a name="line.188"></a>
<FONT color="green">189</FONT>         * @param anUberspect to allow different introspection behaviour<a name="line.189"></a>
<FONT color="green">190</FONT>         * @param anArithmetic to allow different arithmetic behaviour<a name="line.190"></a>
<FONT color="green">191</FONT>         * @param theFunctions an optional map of functions (@link setFunctions)<a name="line.191"></a>
<FONT color="green">192</FONT>         * @param log the logger for various messages<a name="line.192"></a>
<FONT color="green">193</FONT>         */<a name="line.193"></a>
<FONT color="green">194</FONT>        public JexlEngine(Uberspect anUberspect, JexlArithmetic anArithmetic, Map&lt;String, Object&gt; theFunctions, Log log) {<a name="line.194"></a>
<FONT color="green">195</FONT>            this.uberspect = anUberspect == null ? getUberspect(log) : anUberspect;<a name="line.195"></a>
<FONT color="green">196</FONT>            if (log == null) {<a name="line.196"></a>
<FONT color="green">197</FONT>                log = LogFactory.getLog(JexlEngine.class);<a name="line.197"></a>
<FONT color="green">198</FONT>            }<a name="line.198"></a>
<FONT color="green">199</FONT>            this.logger = log;<a name="line.199"></a>
<FONT color="green">200</FONT>            this.arithmetic = anArithmetic == null ? new JexlArithmetic(true) : anArithmetic;<a name="line.200"></a>
<FONT color="green">201</FONT>            if (theFunctions != null) {<a name="line.201"></a>
<FONT color="green">202</FONT>                this.functions = theFunctions;<a name="line.202"></a>
<FONT color="green">203</FONT>            }<a name="line.203"></a>
<FONT color="green">204</FONT>        }<a name="line.204"></a>
<FONT color="green">205</FONT>    <a name="line.205"></a>
<FONT color="green">206</FONT>        /**<a name="line.206"></a>
<FONT color="green">207</FONT>         *  Gets the default instance of Uberspect.<a name="line.207"></a>
<FONT color="green">208</FONT>         * &lt;p&gt;This is lazily initialized to avoid building a default instance if there<a name="line.208"></a>
<FONT color="green">209</FONT>         * is no use for it. The main reason for not using the default Uberspect instance is to<a name="line.209"></a>
<FONT color="green">210</FONT>         * be able to use a (low level) introspector created with a given logger<a name="line.210"></a>
<FONT color="green">211</FONT>         * instead of the default one.&lt;/p&gt;<a name="line.211"></a>
<FONT color="green">212</FONT>         * @param logger the logger to use for the underlying Uberspect<a name="line.212"></a>
<FONT color="green">213</FONT>         * @return Uberspect the default uberspector instance.<a name="line.213"></a>
<FONT color="green">214</FONT>         */<a name="line.214"></a>
<FONT color="green">215</FONT>        public static Uberspect getUberspect(Log logger) {<a name="line.215"></a>
<FONT color="green">216</FONT>            if (logger == null || logger.equals(LogFactory.getLog(JexlEngine.class))) {<a name="line.216"></a>
<FONT color="green">217</FONT>                return UberspectHolder.UBERSPECT;<a name="line.217"></a>
<FONT color="green">218</FONT>            }<a name="line.218"></a>
<FONT color="green">219</FONT>            return new UberspectImpl(logger);<a name="line.219"></a>
<FONT color="green">220</FONT>        }<a name="line.220"></a>
<FONT color="green">221</FONT>    <a name="line.221"></a>
<FONT color="green">222</FONT>        /**<a name="line.222"></a>
<FONT color="green">223</FONT>         * Gets this engine underlying uberspect.<a name="line.223"></a>
<FONT color="green">224</FONT>         * @return the uberspect<a name="line.224"></a>
<FONT color="green">225</FONT>         */<a name="line.225"></a>
<FONT color="green">226</FONT>        public Uberspect getUberspect() {<a name="line.226"></a>
<FONT color="green">227</FONT>            return uberspect;<a name="line.227"></a>
<FONT color="green">228</FONT>        }<a name="line.228"></a>
<FONT color="green">229</FONT>    <a name="line.229"></a>
<FONT color="green">230</FONT>        /**<a name="line.230"></a>
<FONT color="green">231</FONT>         * Gets this engine underlying arithmetic.<a name="line.231"></a>
<FONT color="green">232</FONT>         * @return the arithmetic<a name="line.232"></a>
<FONT color="green">233</FONT>         * @since 2.1<a name="line.233"></a>
<FONT color="green">234</FONT>         */<a name="line.234"></a>
<FONT color="green">235</FONT>        public JexlArithmetic getArithmetic() {<a name="line.235"></a>
<FONT color="green">236</FONT>            return arithmetic;<a name="line.236"></a>
<FONT color="green">237</FONT>        }<a name="line.237"></a>
<FONT color="green">238</FONT>    <a name="line.238"></a>
<FONT color="green">239</FONT>        /**<a name="line.239"></a>
<FONT color="green">240</FONT>         * Sets whether this engine reports debugging information when error occurs.<a name="line.240"></a>
<FONT color="green">241</FONT>         * &lt;p&gt;This method is &lt;em&gt;not&lt;/em&gt; thread safe; it should be called as an optional step of the JexlEngine<a name="line.241"></a>
<FONT color="green">242</FONT>         * initialization code before expression creation &amp;amp; evaluation.&lt;/p&gt;<a name="line.242"></a>
<FONT color="green">243</FONT>         * @see JexlEngine#setSilent<a name="line.243"></a>
<FONT color="green">244</FONT>         * @see JexlEngine#setLenient<a name="line.244"></a>
<FONT color="green">245</FONT>         * @param flag true implies debug is on, false implies debug is off.<a name="line.245"></a>
<FONT color="green">246</FONT>         */<a name="line.246"></a>
<FONT color="green">247</FONT>        public void setDebug(boolean flag) {<a name="line.247"></a>
<FONT color="green">248</FONT>            this.debug = flag;<a name="line.248"></a>
<FONT color="green">249</FONT>        }<a name="line.249"></a>
<FONT color="green">250</FONT>    <a name="line.250"></a>
<FONT color="green">251</FONT>        /**<a name="line.251"></a>
<FONT color="green">252</FONT>         * Checks whether this engine is in debug mode.<a name="line.252"></a>
<FONT color="green">253</FONT>         * @return true if debug is on, false otherwise<a name="line.253"></a>
<FONT color="green">254</FONT>         */<a name="line.254"></a>
<FONT color="green">255</FONT>        public boolean isDebug() {<a name="line.255"></a>
<FONT color="green">256</FONT>            return this.debug;<a name="line.256"></a>
<FONT color="green">257</FONT>        }<a name="line.257"></a>
<FONT color="green">258</FONT>    <a name="line.258"></a>
<FONT color="green">259</FONT>        /**<a name="line.259"></a>
<FONT color="green">260</FONT>         * Sets whether this engine throws JexlException during evaluation when an error is triggered.<a name="line.260"></a>
<FONT color="green">261</FONT>         * &lt;p&gt;This method is &lt;em&gt;not&lt;/em&gt; thread safe; it should be called as an optional step of the JexlEngine<a name="line.261"></a>
<FONT color="green">262</FONT>         * initialization code before expression creation &amp;amp; evaluation.&lt;/p&gt;<a name="line.262"></a>
<FONT color="green">263</FONT>         * @see JexlEngine#setDebug<a name="line.263"></a>
<FONT color="green">264</FONT>         * @see JexlEngine#setLenient<a name="line.264"></a>
<FONT color="green">265</FONT>         * @param flag true means no JexlException will occur, false allows them<a name="line.265"></a>
<FONT color="green">266</FONT>         */<a name="line.266"></a>
<FONT color="green">267</FONT>        public void setSilent(boolean flag) {<a name="line.267"></a>
<FONT color="green">268</FONT>            this.silent = flag;<a name="line.268"></a>
<FONT color="green">269</FONT>        }<a name="line.269"></a>
<FONT color="green">270</FONT>    <a name="line.270"></a>
<FONT color="green">271</FONT>        /**<a name="line.271"></a>
<FONT color="green">272</FONT>         * Checks whether this engine throws JexlException during evaluation.<a name="line.272"></a>
<FONT color="green">273</FONT>         * @return true if silent, false (default) otherwise<a name="line.273"></a>
<FONT color="green">274</FONT>         */<a name="line.274"></a>
<FONT color="green">275</FONT>        public boolean isSilent() {<a name="line.275"></a>
<FONT color="green">276</FONT>            return this.silent;<a name="line.276"></a>
<FONT color="green">277</FONT>        }<a name="line.277"></a>
<FONT color="green">278</FONT>        <a name="line.278"></a>
<FONT color="green">279</FONT>        /**<a name="line.279"></a>
<FONT color="green">280</FONT>         * Sets whether this engine considers unknown variables, methods and constructors as errors or evaluates them<a name="line.280"></a>
<FONT color="green">281</FONT>         * as null or zero.<a name="line.281"></a>
<FONT color="green">282</FONT>         * &lt;p&gt;This method is &lt;em&gt;not&lt;/em&gt; thread safe; it should be called as an optional step of the JexlEngine<a name="line.282"></a>
<FONT color="green">283</FONT>         * initialization code before expression creation &amp;amp; evaluation.&lt;/p&gt;<a name="line.283"></a>
<FONT color="green">284</FONT>         * &lt;p&gt;As of 2.1, you can use a JexlThreadedArithmetic instance to allow the JexlArithmetic<a name="line.284"></a>
<FONT color="green">285</FONT>         * leniency behavior to be independently specified per thread, whilst still using a single engine.&lt;/p&gt;<a name="line.285"></a>
<FONT color="green">286</FONT>         * @see JexlEngine#setSilent<a name="line.286"></a>
<FONT color="green">287</FONT>         * @see JexlEngine#setDebug<a name="line.287"></a>
<FONT color="green">288</FONT>         * @param flag true means no JexlException will occur, false allows them<a name="line.288"></a>
<FONT color="green">289</FONT>         */<a name="line.289"></a>
<FONT color="green">290</FONT>        @SuppressWarnings("deprecation")<a name="line.290"></a>
<FONT color="green">291</FONT>        public void setLenient(boolean flag) {<a name="line.291"></a>
<FONT color="green">292</FONT>            if (arithmetic instanceof JexlThreadedArithmetic) {<a name="line.292"></a>
<FONT color="green">293</FONT>                JexlThreadedArithmetic.setLenient(Boolean.valueOf(flag));<a name="line.293"></a>
<FONT color="green">294</FONT>            } else {<a name="line.294"></a>
<FONT color="green">295</FONT>                this.arithmetic.setLenient(flag);<a name="line.295"></a>
<FONT color="green">296</FONT>            }<a name="line.296"></a>
<FONT color="green">297</FONT>        }<a name="line.297"></a>
<FONT color="green">298</FONT>    <a name="line.298"></a>
<FONT color="green">299</FONT>        /**<a name="line.299"></a>
<FONT color="green">300</FONT>         * Checks whether this engine considers unknown variables, methods and constructors as errors.<a name="line.300"></a>
<FONT color="green">301</FONT>         * @return true if lenient, false if strict<a name="line.301"></a>
<FONT color="green">302</FONT>         */<a name="line.302"></a>
<FONT color="green">303</FONT>        public boolean isLenient() {<a name="line.303"></a>
<FONT color="green">304</FONT>            return arithmetic.isLenient();<a name="line.304"></a>
<FONT color="green">305</FONT>        }<a name="line.305"></a>
<FONT color="green">306</FONT>    <a name="line.306"></a>
<FONT color="green">307</FONT>        /**<a name="line.307"></a>
<FONT color="green">308</FONT>         * Sets whether this engine behaves in strict or lenient mode.<a name="line.308"></a>
<FONT color="green">309</FONT>         * Equivalent to setLenient(!flag).<a name="line.309"></a>
<FONT color="green">310</FONT>         * &lt;p&gt;This method is &lt;em&gt;not&lt;/em&gt; thread safe; it should be called as an optional step of the JexlEngine<a name="line.310"></a>
<FONT color="green">311</FONT>         * initialization code before expression creation &amp;amp; evaluation.&lt;/p&gt;<a name="line.311"></a>
<FONT color="green">312</FONT>         * @param flag true for strict, false for lenient<a name="line.312"></a>
<FONT color="green">313</FONT>         * @since 2.1<a name="line.313"></a>
<FONT color="green">314</FONT>         */<a name="line.314"></a>
<FONT color="green">315</FONT>        public final void setStrict(boolean flag) {<a name="line.315"></a>
<FONT color="green">316</FONT>            setLenient(!flag);<a name="line.316"></a>
<FONT color="green">317</FONT>        }<a name="line.317"></a>
<FONT color="green">318</FONT>    <a name="line.318"></a>
<FONT color="green">319</FONT>        /**<a name="line.319"></a>
<FONT color="green">320</FONT>         * Checks whether this engine behaves in strict or lenient mode.<a name="line.320"></a>
<FONT color="green">321</FONT>         * Equivalent to !isLenient().<a name="line.321"></a>
<FONT color="green">322</FONT>         * @return true for strict, false for lenient<a name="line.322"></a>
<FONT color="green">323</FONT>         * @since 2.1<a name="line.323"></a>
<FONT color="green">324</FONT>         */<a name="line.324"></a>
<FONT color="green">325</FONT>        public final boolean isStrict() {<a name="line.325"></a>
<FONT color="green">326</FONT>            return !isLenient();<a name="line.326"></a>
<FONT color="green">327</FONT>        }<a name="line.327"></a>
<FONT color="green">328</FONT>    <a name="line.328"></a>
<FONT color="green">329</FONT>        /**<a name="line.329"></a>
<FONT color="green">330</FONT>         * Sets the class loader used to discover classes in 'new' expressions.<a name="line.330"></a>
<FONT color="green">331</FONT>         * &lt;p&gt;This method should be called as an optional step of the JexlEngine<a name="line.331"></a>
<FONT color="green">332</FONT>         * initialization code before expression creation &amp;amp; evaluation.&lt;/p&gt;<a name="line.332"></a>
<FONT color="green">333</FONT>         * @param loader the class loader to use<a name="line.333"></a>
<FONT color="green">334</FONT>         */<a name="line.334"></a>
<FONT color="green">335</FONT>        public void setClassLoader(ClassLoader loader) {<a name="line.335"></a>
<FONT color="green">336</FONT>            uberspect.setClassLoader(loader);<a name="line.336"></a>
<FONT color="green">337</FONT>        }<a name="line.337"></a>
<FONT color="green">338</FONT>    <a name="line.338"></a>
<FONT color="green">339</FONT>        /**<a name="line.339"></a>
<FONT color="green">340</FONT>         * Sets a cache for expressions of the defined size.<a name="line.340"></a>
<FONT color="green">341</FONT>         * &lt;p&gt;The cache will contain at most &lt;code&gt;size&lt;/code&gt; expressions. Note that<a name="line.341"></a>
<FONT color="green">342</FONT>         * all JEXL caches are held through SoftReferences and may be garbage-collected.&lt;/p&gt;<a name="line.342"></a>
<FONT color="green">343</FONT>         * @param size if not strictly positive, no cache is used.<a name="line.343"></a>
<FONT color="green">344</FONT>         */<a name="line.344"></a>
<FONT color="green">345</FONT>        public void setCache(int size) {<a name="line.345"></a>
<FONT color="green">346</FONT>            // since the cache is only used during parse, use same sync object<a name="line.346"></a>
<FONT color="green">347</FONT>            synchronized (parser) {<a name="line.347"></a>
<FONT color="green">348</FONT>                if (size &lt;= 0) {<a name="line.348"></a>
<FONT color="green">349</FONT>                    cache = null;<a name="line.349"></a>
<FONT color="green">350</FONT>                } else if (cache == null || cache.size() != size) {<a name="line.350"></a>
<FONT color="green">351</FONT>                    cache = new SoftCache&lt;String, ASTJexlScript&gt;(size);<a name="line.351"></a>
<FONT color="green">352</FONT>                }<a name="line.352"></a>
<FONT color="green">353</FONT>            }<a name="line.353"></a>
<FONT color="green">354</FONT>        }<a name="line.354"></a>
<FONT color="green">355</FONT>    <a name="line.355"></a>
<FONT color="green">356</FONT>        /**<a name="line.356"></a>
<FONT color="green">357</FONT>         * Sets the map of function namespaces.<a name="line.357"></a>
<FONT color="green">358</FONT>         * &lt;p&gt;<a name="line.358"></a>
<FONT color="green">359</FONT>         * This method is &lt;em&gt;not&lt;/em&gt; thread safe; it should be called as an optional step of the JexlEngine<a name="line.359"></a>
<FONT color="green">360</FONT>         * initialization code before expression creation &amp;amp; evaluation.<a name="line.360"></a>
<FONT color="green">361</FONT>         * &lt;/p&gt;<a name="line.361"></a>
<FONT color="green">362</FONT>         * &lt;p&gt;<a name="line.362"></a>
<FONT color="green">363</FONT>         * Each entry key is used as a prefix, each entry value used as a bean implementing<a name="line.363"></a>
<FONT color="green">364</FONT>         * methods; an expression like 'nsx:method(123)' will thus be solved by looking at<a name="line.364"></a>
<FONT color="green">365</FONT>         * a registered bean named 'nsx' that implements method 'method' in that map.<a name="line.365"></a>
<FONT color="green">366</FONT>         * If all methods are static, you may use the bean class instead of an instance as value.<a name="line.366"></a>
<FONT color="green">367</FONT>         * &lt;/p&gt;<a name="line.367"></a>
<FONT color="green">368</FONT>         * &lt;p&gt;<a name="line.368"></a>
<FONT color="green">369</FONT>         * If the entry value is a class that has one contructor taking a JexlContext as argument, an instance<a name="line.369"></a>
<FONT color="green">370</FONT>         * of the namespace will be created at evaluation time. It might be a good idea to derive a JexlContext<a name="line.370"></a>
<FONT color="green">371</FONT>         * to carry the information used by the namespace to avoid variable space pollution and strongly type<a name="line.371"></a>
<FONT color="green">372</FONT>         * the constructor with this specialized JexlContext.<a name="line.372"></a>
<FONT color="green">373</FONT>         * &lt;/p&gt;<a name="line.373"></a>
<FONT color="green">374</FONT>         * &lt;p&gt;<a name="line.374"></a>
<FONT color="green">375</FONT>         * The key or prefix allows to retrieve the bean that plays the role of the namespace.<a name="line.375"></a>
<FONT color="green">376</FONT>         * If the prefix is null, the namespace is the top-level namespace allowing to define<a name="line.376"></a>
<FONT color="green">377</FONT>         * top-level user defined functions ( ie: myfunc(...) )<a name="line.377"></a>
<FONT color="green">378</FONT>         * &lt;/p&gt;<a name="line.378"></a>
<FONT color="green">379</FONT>         * &lt;p&gt;Note that the JexlContext is also used to try to solve top-level functions. This allows ObjectContext<a name="line.379"></a>
<FONT color="green">380</FONT>         * derived instances to call methods on the wrapped object.&lt;/p&gt;<a name="line.380"></a>
<FONT color="green">381</FONT>         * @param funcs the map of functions that should not mutate after the call; if null<a name="line.381"></a>
<FONT color="green">382</FONT>         * is passed, the empty collection is used.<a name="line.382"></a>
<FONT color="green">383</FONT>         */<a name="line.383"></a>
<FONT color="green">384</FONT>        public void setFunctions(Map&lt;String, Object&gt; funcs) {<a name="line.384"></a>
<FONT color="green">385</FONT>            functions = funcs != null ? funcs : Collections.&lt;String, Object&gt;emptyMap();<a name="line.385"></a>
<FONT color="green">386</FONT>        }<a name="line.386"></a>
<FONT color="green">387</FONT>    <a name="line.387"></a>
<FONT color="green">388</FONT>        /**<a name="line.388"></a>
<FONT color="green">389</FONT>         * Retrieves the map of function namespaces.<a name="line.389"></a>
<FONT color="green">390</FONT>         *<a name="line.390"></a>
<FONT color="green">391</FONT>         * @return the map passed in setFunctions or the empty map if the<a name="line.391"></a>
<FONT color="green">392</FONT>         * original was null.<a name="line.392"></a>
<FONT color="green">393</FONT>         */<a name="line.393"></a>
<FONT color="green">394</FONT>        public Map&lt;String, Object&gt; getFunctions() {<a name="line.394"></a>
<FONT color="green">395</FONT>            return functions;<a name="line.395"></a>
<FONT color="green">396</FONT>        }<a name="line.396"></a>
<FONT color="green">397</FONT>    <a name="line.397"></a>
<FONT color="green">398</FONT>        /**<a name="line.398"></a>
<FONT color="green">399</FONT>         * An overridable through covariant return Expression creator.<a name="line.399"></a>
<FONT color="green">400</FONT>         * @param text the script text<a name="line.400"></a>
<FONT color="green">401</FONT>         * @param tree the parse AST tree<a name="line.401"></a>
<FONT color="green">402</FONT>         * @return the script instance<a name="line.402"></a>
<FONT color="green">403</FONT>         */<a name="line.403"></a>
<FONT color="green">404</FONT>        protected Expression createExpression(ASTJexlScript tree, String text) {<a name="line.404"></a>
<FONT color="green">405</FONT>            return new ExpressionImpl(this, text, tree);<a name="line.405"></a>
<FONT color="green">406</FONT>        }<a name="line.406"></a>
<FONT color="green">407</FONT>    <a name="line.407"></a>
<FONT color="green">408</FONT>        /**<a name="line.408"></a>
<FONT color="green">409</FONT>         * Creates an Expression from a String containing valid<a name="line.409"></a>
<FONT color="green">410</FONT>         * JEXL syntax.  This method parses the expression which<a name="line.410"></a>
<FONT color="green">411</FONT>         * must contain either a reference or an expression.<a name="line.411"></a>
<FONT color="green">412</FONT>         * @param expression A String containing valid JEXL syntax<a name="line.412"></a>
<FONT color="green">413</FONT>         * @return An Expression object which can be evaluated with a JexlContext<a name="line.413"></a>
<FONT color="green">414</FONT>         * @throws JexlException An exception can be thrown if there is a problem<a name="line.414"></a>
<FONT color="green">415</FONT>         *      parsing this expression, or if the expression is neither an<a name="line.415"></a>
<FONT color="green">416</FONT>         *      expression nor a reference.<a name="line.416"></a>
<FONT color="green">417</FONT>         */<a name="line.417"></a>
<FONT color="green">418</FONT>        public Expression createExpression(String expression) {<a name="line.418"></a>
<FONT color="green">419</FONT>            return createExpression(expression, null);<a name="line.419"></a>
<FONT color="green">420</FONT>        }<a name="line.420"></a>
<FONT color="green">421</FONT>    <a name="line.421"></a>
<FONT color="green">422</FONT>        /**<a name="line.422"></a>
<FONT color="green">423</FONT>         * Creates an Expression from a String containing valid<a name="line.423"></a>
<FONT color="green">424</FONT>         * JEXL syntax.  This method parses the expression which<a name="line.424"></a>
<FONT color="green">425</FONT>         * must contain either a reference or an expression.<a name="line.425"></a>
<FONT color="green">426</FONT>         * @param expression A String containing valid JEXL syntax<a name="line.426"></a>
<FONT color="green">427</FONT>         * @return An Expression object which can be evaluated with a JexlContext<a name="line.427"></a>
<FONT color="green">428</FONT>         * @param info An info structure to carry debugging information if needed<a name="line.428"></a>
<FONT color="green">429</FONT>         * @throws JexlException An exception can be thrown if there is a problem<a name="line.429"></a>
<FONT color="green">430</FONT>         *      parsing this expression, or if the expression is neither an<a name="line.430"></a>
<FONT color="green">431</FONT>         *      expression or a reference.<a name="line.431"></a>
<FONT color="green">432</FONT>         */<a name="line.432"></a>
<FONT color="green">433</FONT>        public Expression createExpression(String expression, JexlInfo info) {<a name="line.433"></a>
<FONT color="green">434</FONT>            // Parse the expression<a name="line.434"></a>
<FONT color="green">435</FONT>            ASTJexlScript tree = parse(expression, info, null);<a name="line.435"></a>
<FONT color="green">436</FONT>            if (tree.jjtGetNumChildren() &gt; 1) {<a name="line.436"></a>
<FONT color="green">437</FONT>                logger.warn("The JEXL Expression created will be a reference"<a name="line.437"></a>
<FONT color="green">438</FONT>                        + " to the first expression from the supplied script: \"" + expression + "\" ");<a name="line.438"></a>
<FONT color="green">439</FONT>            }<a name="line.439"></a>
<FONT color="green">440</FONT>            return createExpression(tree, expression);<a name="line.440"></a>
<FONT color="green">441</FONT>        }<a name="line.441"></a>
<FONT color="green">442</FONT>    <a name="line.442"></a>
<FONT color="green">443</FONT>        /**<a name="line.443"></a>
<FONT color="green">444</FONT>         * Creates a Script from a String containing valid JEXL syntax.<a name="line.444"></a>
<FONT color="green">445</FONT>         * This method parses the script which validates the syntax.<a name="line.445"></a>
<FONT color="green">446</FONT>         *<a name="line.446"></a>
<FONT color="green">447</FONT>         * @param scriptText A String containing valid JEXL syntax<a name="line.447"></a>
<FONT color="green">448</FONT>         * @return A {@link Script} which can be executed using a {@link JexlContext}.<a name="line.448"></a>
<FONT color="green">449</FONT>         * @throws JexlException if there is a problem parsing the script.<a name="line.449"></a>
<FONT color="green">450</FONT>         */<a name="line.450"></a>
<FONT color="green">451</FONT>        public Script createScript(String scriptText) {<a name="line.451"></a>
<FONT color="green">452</FONT>            return createScript(scriptText, null, null);<a name="line.452"></a>
<FONT color="green">453</FONT>        }<a name="line.453"></a>
<FONT color="green">454</FONT>    <a name="line.454"></a>
<FONT color="green">455</FONT>        /**<a name="line.455"></a>
<FONT color="green">456</FONT>         * Creates a Script from a String containing valid JEXL syntax.<a name="line.456"></a>
<FONT color="green">457</FONT>         * This method parses the script which validates the syntax.<a name="line.457"></a>
<FONT color="green">458</FONT>         *<a name="line.458"></a>
<FONT color="green">459</FONT>         * @param scriptText A String containing valid JEXL syntax<a name="line.459"></a>
<FONT color="green">460</FONT>         * @param info An info structure to carry debugging information if needed<a name="line.460"></a>
<FONT color="green">461</FONT>         * @return A {@link Script} which can be executed using a {@link JexlContext}.<a name="line.461"></a>
<FONT color="green">462</FONT>         * @throws JexlException if there is a problem parsing the script.<a name="line.462"></a>
<FONT color="green">463</FONT>         * @deprecated Use {@link #createScript(String, JexlInfo, String[])}<a name="line.463"></a>
<FONT color="green">464</FONT>         */<a name="line.464"></a>
<FONT color="green">465</FONT>        @Deprecated<a name="line.465"></a>
<FONT color="green">466</FONT>        public Script createScript(String scriptText, JexlInfo info) {<a name="line.466"></a>
<FONT color="green">467</FONT>            if (scriptText == null) {<a name="line.467"></a>
<FONT color="green">468</FONT>                throw new NullPointerException("scriptText is null");<a name="line.468"></a>
<FONT color="green">469</FONT>            }<a name="line.469"></a>
<FONT color="green">470</FONT>            // Parse the expression<a name="line.470"></a>
<FONT color="green">471</FONT>            ASTJexlScript tree = parse(scriptText, info);<a name="line.471"></a>
<FONT color="green">472</FONT>            return createScript(tree, scriptText);<a name="line.472"></a>
<FONT color="green">473</FONT>        }<a name="line.473"></a>
<FONT color="green">474</FONT>    <a name="line.474"></a>
<FONT color="green">475</FONT>        /**<a name="line.475"></a>
<FONT color="green">476</FONT>         * Creates a Script from a String containing valid JEXL syntax.<a name="line.476"></a>
<FONT color="green">477</FONT>         * This method parses the script which validates the syntax.<a name="line.477"></a>
<FONT color="green">478</FONT>         *<a name="line.478"></a>
<FONT color="green">479</FONT>         * @param scriptText A String containing valid JEXL syntax<a name="line.479"></a>
<FONT color="green">480</FONT>         * @param names the script parameter names<a name="line.480"></a>
<FONT color="green">481</FONT>         * @return A {@link Script} which can be executed using a {@link JexlContext}.<a name="line.481"></a>
<FONT color="green">482</FONT>         * @throws JexlException if there is a problem parsing the script.<a name="line.482"></a>
<FONT color="green">483</FONT>         */<a name="line.483"></a>
<FONT color="green">484</FONT>        public Script createScript(String scriptText, String... names) {<a name="line.484"></a>
<FONT color="green">485</FONT>            return createScript(scriptText, null, names);<a name="line.485"></a>
<FONT color="green">486</FONT>        }<a name="line.486"></a>
<FONT color="green">487</FONT>    <a name="line.487"></a>
<FONT color="green">488</FONT>        /**<a name="line.488"></a>
<FONT color="green">489</FONT>         * Creates a Script from a String containing valid JEXL syntax.<a name="line.489"></a>
<FONT color="green">490</FONT>         * This method parses the script which validates the syntax.<a name="line.490"></a>
<FONT color="green">491</FONT>         * It uses an array of parameter names that will be resolved during parsing;<a name="line.491"></a>
<FONT color="green">492</FONT>         * a corresponding array of arguments containing values should be used during evaluation.<a name="line.492"></a>
<FONT color="green">493</FONT>         *<a name="line.493"></a>
<FONT color="green">494</FONT>         * @param scriptText A String containing valid JEXL syntax<a name="line.494"></a>
<FONT color="green">495</FONT>         * @param info An info structure to carry debugging information if needed<a name="line.495"></a>
<FONT color="green">496</FONT>         * @param names the script parameter names<a name="line.496"></a>
<FONT color="green">497</FONT>         * @return A {@link Script} which can be executed using a {@link JexlContext}.<a name="line.497"></a>
<FONT color="green">498</FONT>         * @throws JexlException if there is a problem parsing the script.<a name="line.498"></a>
<FONT color="green">499</FONT>         * @since 2.1<a name="line.499"></a>
<FONT color="green">500</FONT>         */<a name="line.500"></a>
<FONT color="green">501</FONT>        public Script createScript(String scriptText, JexlInfo info, String[] names) {<a name="line.501"></a>
<FONT color="green">502</FONT>            if (scriptText == null) {<a name="line.502"></a>
<FONT color="green">503</FONT>                throw new NullPointerException("scriptText is null");<a name="line.503"></a>
<FONT color="green">504</FONT>            }<a name="line.504"></a>
<FONT color="green">505</FONT>            // Parse the expression<a name="line.505"></a>
<FONT color="green">506</FONT>            ASTJexlScript tree = parse(scriptText, info, new Scope(names));<a name="line.506"></a>
<FONT color="green">507</FONT>            return createScript(tree, scriptText);<a name="line.507"></a>
<FONT color="green">508</FONT>        }<a name="line.508"></a>
<FONT color="green">509</FONT>    <a name="line.509"></a>
<FONT color="green">510</FONT>        /**<a name="line.510"></a>
<FONT color="green">511</FONT>         * An overridable through covariant return Script creator.<a name="line.511"></a>
<FONT color="green">512</FONT>         * @param text the script text<a name="line.512"></a>
<FONT color="green">513</FONT>         * @param tree the parse AST tree<a name="line.513"></a>
<FONT color="green">514</FONT>         * @return the script instance<a name="line.514"></a>
<FONT color="green">515</FONT>         */<a name="line.515"></a>
<FONT color="green">516</FONT>        protected Script createScript(ASTJexlScript tree, String text) {<a name="line.516"></a>
<FONT color="green">517</FONT>            return new ExpressionImpl(this, text, tree);<a name="line.517"></a>
<FONT color="green">518</FONT>        }<a name="line.518"></a>
<FONT color="green">519</FONT>    <a name="line.519"></a>
<FONT color="green">520</FONT>        /**<a name="line.520"></a>
<FONT color="green">521</FONT>         * Creates a Script from a {@link File} containing valid JEXL syntax.<a name="line.521"></a>
<FONT color="green">522</FONT>         * This method parses the script and validates the syntax.<a name="line.522"></a>
<FONT color="green">523</FONT>         *<a name="line.523"></a>
<FONT color="green">524</FONT>         * @param scriptFile A {@link File} containing valid JEXL syntax.<a name="line.524"></a>
<FONT color="green">525</FONT>         *      Must not be null. Must be a readable file.<a name="line.525"></a>
<FONT color="green">526</FONT>         * @return A {@link Script} which can be executed with a<a name="line.526"></a>
<FONT color="green">527</FONT>         *      {@link JexlContext}.<a name="line.527"></a>
<FONT color="green">528</FONT>         * @throws IOException if there is a problem reading the script.<a name="line.528"></a>
<FONT color="green">529</FONT>         * @throws JexlException if there is a problem parsing the script.<a name="line.529"></a>
<FONT color="green">530</FONT>         */<a name="line.530"></a>
<FONT color="green">531</FONT>        public Script createScript(File scriptFile) throws IOException {<a name="line.531"></a>
<FONT color="green">532</FONT>            if (scriptFile == null) {<a name="line.532"></a>
<FONT color="green">533</FONT>                throw new NullPointerException("scriptFile is null");<a name="line.533"></a>
<FONT color="green">534</FONT>            }<a name="line.534"></a>
<FONT color="green">535</FONT>            if (!scriptFile.canRead()) {<a name="line.535"></a>
<FONT color="green">536</FONT>                throw new IOException("Can't read scriptFile (" + scriptFile.getCanonicalPath() + ")");<a name="line.536"></a>
<FONT color="green">537</FONT>            }<a name="line.537"></a>
<FONT color="green">538</FONT>            BufferedReader reader = new BufferedReader(new FileReader(scriptFile));<a name="line.538"></a>
<FONT color="green">539</FONT>            JexlInfo info = null;<a name="line.539"></a>
<FONT color="green">540</FONT>            if (debug) {<a name="line.540"></a>
<FONT color="green">541</FONT>                info = createInfo(scriptFile.getName(), 0, 0);<a name="line.541"></a>
<FONT color="green">542</FONT>            }<a name="line.542"></a>
<FONT color="green">543</FONT>            return createScript(readerToString(reader), info, null);<a name="line.543"></a>
<FONT color="green">544</FONT>        }<a name="line.544"></a>
<FONT color="green">545</FONT>    <a name="line.545"></a>
<FONT color="green">546</FONT>        /**<a name="line.546"></a>
<FONT color="green">547</FONT>         * Creates a Script from a {@link URL} containing valid JEXL syntax.<a name="line.547"></a>
<FONT color="green">548</FONT>         * This method parses the script and validates the syntax.<a name="line.548"></a>
<FONT color="green">549</FONT>         *<a name="line.549"></a>
<FONT color="green">550</FONT>         * @param scriptUrl A {@link URL} containing valid JEXL syntax.<a name="line.550"></a>
<FONT color="green">551</FONT>         *      Must not be null. Must be a readable file.<a name="line.551"></a>
<FONT color="green">552</FONT>         * @return A {@link Script} which can be executed with a<a name="line.552"></a>
<FONT color="green">553</FONT>         *      {@link JexlContext}.<a name="line.553"></a>
<FONT color="green">554</FONT>         * @throws IOException if there is a problem reading the script.<a name="line.554"></a>
<FONT color="green">555</FONT>         * @throws JexlException if there is a problem parsing the script.<a name="line.555"></a>
<FONT color="green">556</FONT>         */<a name="line.556"></a>
<FONT color="green">557</FONT>        public Script createScript(URL scriptUrl) throws IOException {<a name="line.557"></a>
<FONT color="green">558</FONT>            if (scriptUrl == null) {<a name="line.558"></a>
<FONT color="green">559</FONT>                throw new NullPointerException("scriptUrl is null");<a name="line.559"></a>
<FONT color="green">560</FONT>            }<a name="line.560"></a>
<FONT color="green">561</FONT>            URLConnection connection = scriptUrl.openConnection();<a name="line.561"></a>
<FONT color="green">562</FONT>    <a name="line.562"></a>
<FONT color="green">563</FONT>            BufferedReader reader = new BufferedReader(<a name="line.563"></a>
<FONT color="green">564</FONT>                    new InputStreamReader(connection.getInputStream()));<a name="line.564"></a>
<FONT color="green">565</FONT>            JexlInfo info = null;<a name="line.565"></a>
<FONT color="green">566</FONT>            if (debug) {<a name="line.566"></a>
<FONT color="green">567</FONT>                info = createInfo(scriptUrl.toString(), 0, 0);<a name="line.567"></a>
<FONT color="green">568</FONT>            }<a name="line.568"></a>
<FONT color="green">569</FONT>            return createScript(readerToString(reader), info, null);<a name="line.569"></a>
<FONT color="green">570</FONT>        }<a name="line.570"></a>
<FONT color="green">571</FONT>    <a name="line.571"></a>
<FONT color="green">572</FONT>        /**<a name="line.572"></a>
<FONT color="green">573</FONT>         * Accesses properties of a bean using an expression.<a name="line.573"></a>
<FONT color="green">574</FONT>         * &lt;p&gt;<a name="line.574"></a>
<FONT color="green">575</FONT>         * jexl.get(myobject, "foo.bar"); should equate to<a name="line.575"></a>
<FONT color="green">576</FONT>         * myobject.getFoo().getBar(); (or myobject.getFoo().get("bar"))<a name="line.576"></a>
<FONT color="green">577</FONT>         * &lt;/p&gt;<a name="line.577"></a>
<FONT color="green">578</FONT>         * &lt;p&gt;<a name="line.578"></a>
<FONT color="green">579</FONT>         * If the JEXL engine is silent, errors will be logged through its logger as warning.<a name="line.579"></a>
<FONT color="green">580</FONT>         * &lt;/p&gt;<a name="line.580"></a>
<FONT color="green">581</FONT>         * @param bean the bean to get properties from<a name="line.581"></a>
<FONT color="green">582</FONT>         * @param expr the property expression<a name="line.582"></a>
<FONT color="green">583</FONT>         * @return the value of the property<a name="line.583"></a>
<FONT color="green">584</FONT>         * @throws JexlException if there is an error parsing the expression or during evaluation<a name="line.584"></a>
<FONT color="green">585</FONT>         */<a name="line.585"></a>
<FONT color="green">586</FONT>        public Object getProperty(Object bean, String expr) {<a name="line.586"></a>
<FONT color="green">587</FONT>            return getProperty(null, bean, expr);<a name="line.587"></a>
<FONT color="green">588</FONT>        }<a name="line.588"></a>
<FONT color="green">589</FONT>    <a name="line.589"></a>
<FONT color="green">590</FONT>        /**<a name="line.590"></a>
<FONT color="green">591</FONT>         * Accesses properties of a bean using an expression.<a name="line.591"></a>
<FONT color="green">592</FONT>         * &lt;p&gt;<a name="line.592"></a>
<FONT color="green">593</FONT>         * If the JEXL engine is silent, errors will be logged through its logger as warning.<a name="line.593"></a>
<FONT color="green">594</FONT>         * &lt;/p&gt;<a name="line.594"></a>
<FONT color="green">595</FONT>         * @param context the evaluation context<a name="line.595"></a>
<FONT color="green">596</FONT>         * @param bean the bean to get properties from<a name="line.596"></a>
<FONT color="green">597</FONT>         * @param expr the property expression<a name="line.597"></a>
<FONT color="green">598</FONT>         * @return the value of the property<a name="line.598"></a>
<FONT color="green">599</FONT>         * @throws JexlException if there is an error parsing the expression or during evaluation<a name="line.599"></a>
<FONT color="green">600</FONT>         */<a name="line.600"></a>
<FONT color="green">601</FONT>        public Object getProperty(JexlContext context, Object bean, String expr) {<a name="line.601"></a>
<FONT color="green">602</FONT>            if (context == null) {<a name="line.602"></a>
<FONT color="green">603</FONT>                context = EMPTY_CONTEXT;<a name="line.603"></a>
<FONT color="green">604</FONT>            }<a name="line.604"></a>
<FONT color="green">605</FONT>            // synthetize expr using register<a name="line.605"></a>
<FONT color="green">606</FONT>            expr = "#0" + (expr.charAt(0) == '[' ? "" : ".") + expr + ";";<a name="line.606"></a>
<FONT color="green">607</FONT>            try {<a name="line.607"></a>
<FONT color="green">608</FONT>                parser.ALLOW_REGISTERS = true;<a name="line.608"></a>
<FONT color="green">609</FONT>                Scope frame = new Scope("#0");<a name="line.609"></a>
<FONT color="green">610</FONT>                ASTJexlScript script = parse(expr, null, frame);<a name="line.610"></a>
<FONT color="green">611</FONT>                JexlNode node = script.jjtGetChild(0);<a name="line.611"></a>
<FONT color="green">612</FONT>                Interpreter interpreter = createInterpreter(context);<a name="line.612"></a>
<FONT color="green">613</FONT>                // set frame<a name="line.613"></a>
<FONT color="green">614</FONT>                interpreter.setFrame(script.createFrame(bean));<a name="line.614"></a>
<FONT color="green">615</FONT>                return node.jjtAccept(interpreter, null);<a name="line.615"></a>
<FONT color="green">616</FONT>            } catch (JexlException xjexl) {<a name="line.616"></a>
<FONT color="green">617</FONT>                if (silent) {<a name="line.617"></a>
<FONT color="green">618</FONT>                    logger.warn(xjexl.getMessage(), xjexl.getCause());<a name="line.618"></a>
<FONT color="green">619</FONT>                    return null;<a name="line.619"></a>
<FONT color="green">620</FONT>                }<a name="line.620"></a>
<FONT color="green">621</FONT>                throw xjexl;<a name="line.621"></a>
<FONT color="green">622</FONT>            } finally {<a name="line.622"></a>
<FONT color="green">623</FONT>                parser.ALLOW_REGISTERS = false;<a name="line.623"></a>
<FONT color="green">624</FONT>            }<a name="line.624"></a>
<FONT color="green">625</FONT>        }<a name="line.625"></a>
<FONT color="green">626</FONT>    <a name="line.626"></a>
<FONT color="green">627</FONT>        /**<a name="line.627"></a>
<FONT color="green">628</FONT>         * Assign properties of a bean using an expression.<a name="line.628"></a>
<FONT color="green">629</FONT>         * &lt;p&gt;<a name="line.629"></a>
<FONT color="green">630</FONT>         * jexl.set(myobject, "foo.bar", 10); should equate to<a name="line.630"></a>
<FONT color="green">631</FONT>         * myobject.getFoo().setBar(10); (or myobject.getFoo().put("bar", 10) )<a name="line.631"></a>
<FONT color="green">632</FONT>         * &lt;/p&gt;<a name="line.632"></a>
<FONT color="green">633</FONT>         * &lt;p&gt;<a name="line.633"></a>
<FONT color="green">634</FONT>         * If the JEXL engine is silent, errors will be logged through its logger as warning.<a name="line.634"></a>
<FONT color="green">635</FONT>         * &lt;/p&gt;<a name="line.635"></a>
<FONT color="green">636</FONT>         * @param bean the bean to set properties in<a name="line.636"></a>
<FONT color="green">637</FONT>         * @param expr the property expression<a name="line.637"></a>
<FONT color="green">638</FONT>         * @param value the value of the property<a name="line.638"></a>
<FONT color="green">639</FONT>         * @throws JexlException if there is an error parsing the expression or during evaluation<a name="line.639"></a>
<FONT color="green">640</FONT>         */<a name="line.640"></a>
<FONT color="green">641</FONT>        public void setProperty(Object bean, String expr, Object value) {<a name="line.641"></a>
<FONT color="green">642</FONT>            setProperty(null, bean, expr, value);<a name="line.642"></a>
<FONT color="green">643</FONT>        }<a name="line.643"></a>
<FONT color="green">644</FONT>    <a name="line.644"></a>
<FONT color="green">645</FONT>        /**<a name="line.645"></a>
<FONT color="green">646</FONT>         * Assign properties of a bean using an expression.<a name="line.646"></a>
<FONT color="green">647</FONT>         * &lt;p&gt;<a name="line.647"></a>
<FONT color="green">648</FONT>         * If the JEXL engine is silent, errors will be logged through its logger as warning.<a name="line.648"></a>
<FONT color="green">649</FONT>         * &lt;/p&gt;<a name="line.649"></a>
<FONT color="green">650</FONT>         * @param context the evaluation context<a name="line.650"></a>
<FONT color="green">651</FONT>         * @param bean the bean to set properties in<a name="line.651"></a>
<FONT color="green">652</FONT>         * @param expr the property expression<a name="line.652"></a>
<FONT color="green">653</FONT>         * @param value the value of the property<a name="line.653"></a>
<FONT color="green">654</FONT>         * @throws JexlException if there is an error parsing the expression or during evaluation<a name="line.654"></a>
<FONT color="green">655</FONT>         */<a name="line.655"></a>
<FONT color="green">656</FONT>        public void setProperty(JexlContext context, Object bean, String expr, Object value) {<a name="line.656"></a>
<FONT color="green">657</FONT>            if (context == null) {<a name="line.657"></a>
<FONT color="green">658</FONT>                context = EMPTY_CONTEXT;<a name="line.658"></a>
<FONT color="green">659</FONT>            }<a name="line.659"></a>
<FONT color="green">660</FONT>            // synthetize expr using registers<a name="line.660"></a>
<FONT color="green">661</FONT>            expr = "#0" + (expr.charAt(0) == '[' ? "" : ".") + expr + "=" + "#1" + ";";<a name="line.661"></a>
<FONT color="green">662</FONT>            try {<a name="line.662"></a>
<FONT color="green">663</FONT>                parser.ALLOW_REGISTERS = true;<a name="line.663"></a>
<FONT color="green">664</FONT>                Scope frame = new Scope("#0", "#1");<a name="line.664"></a>
<FONT color="green">665</FONT>                ASTJexlScript script = parse(expr, null, frame);<a name="line.665"></a>
<FONT color="green">666</FONT>                JexlNode node = script.jjtGetChild(0);<a name="line.666"></a>
<FONT color="green">667</FONT>                Interpreter interpreter = createInterpreter(context);<a name="line.667"></a>
<FONT color="green">668</FONT>                // set the registers<a name="line.668"></a>
<FONT color="green">669</FONT>                interpreter.setFrame(script.createFrame(bean, value));<a name="line.669"></a>
<FONT color="green">670</FONT>                node.jjtAccept(interpreter, null);<a name="line.670"></a>
<FONT color="green">671</FONT>            } catch (JexlException xjexl) {<a name="line.671"></a>
<FONT color="green">672</FONT>                if (silent) {<a name="line.672"></a>
<FONT color="green">673</FONT>                    logger.warn(xjexl.getMessage(), xjexl.getCause());<a name="line.673"></a>
<FONT color="green">674</FONT>                    return;<a name="line.674"></a>
<FONT color="green">675</FONT>                }<a name="line.675"></a>
<FONT color="green">676</FONT>                throw xjexl;<a name="line.676"></a>
<FONT color="green">677</FONT>            } finally {<a name="line.677"></a>
<FONT color="green">678</FONT>                parser.ALLOW_REGISTERS = false;<a name="line.678"></a>
<FONT color="green">679</FONT>            }<a name="line.679"></a>
<FONT color="green">680</FONT>        }<a name="line.680"></a>
<FONT color="green">681</FONT>    <a name="line.681"></a>
<FONT color="green">682</FONT>        /**<a name="line.682"></a>
<FONT color="green">683</FONT>         * Invokes an object's method by name and arguments.<a name="line.683"></a>
<FONT color="green">684</FONT>         * @param obj the method's invoker object<a name="line.684"></a>
<FONT color="green">685</FONT>         * @param meth the method's name<a name="line.685"></a>
<FONT color="green">686</FONT>         * @param args the method's arguments<a name="line.686"></a>
<FONT color="green">687</FONT>         * @return the method returned value or null if it failed and engine is silent<a name="line.687"></a>
<FONT color="green">688</FONT>         * @throws JexlException if method could not be found or failed and engine is not silent<a name="line.688"></a>
<FONT color="green">689</FONT>         */<a name="line.689"></a>
<FONT color="green">690</FONT>        public Object invokeMethod(Object obj, String meth, Object... args) {<a name="line.690"></a>
<FONT color="green">691</FONT>            JexlException xjexl = null;<a name="line.691"></a>
<FONT color="green">692</FONT>            Object result = null;<a name="line.692"></a>
<FONT color="green">693</FONT>            JexlInfo info = debugInfo();<a name="line.693"></a>
<FONT color="green">694</FONT>            try {<a name="line.694"></a>
<FONT color="green">695</FONT>                JexlMethod method = uberspect.getMethod(obj, meth, args, info);<a name="line.695"></a>
<FONT color="green">696</FONT>                if (method == null &amp;&amp; arithmetic.narrowArguments(args)) {<a name="line.696"></a>
<FONT color="green">697</FONT>                    method = uberspect.getMethod(obj, meth, args, info);<a name="line.697"></a>
<FONT color="green">698</FONT>                }<a name="line.698"></a>
<FONT color="green">699</FONT>                if (method != null) {<a name="line.699"></a>
<FONT color="green">700</FONT>                    result = method.invoke(obj, args);<a name="line.700"></a>
<FONT color="green">701</FONT>                } else {<a name="line.701"></a>
<FONT color="green">702</FONT>                    xjexl = new JexlException(info, "failed finding method " + meth);<a name="line.702"></a>
<FONT color="green">703</FONT>                }<a name="line.703"></a>
<FONT color="green">704</FONT>            } catch (Exception xany) {<a name="line.704"></a>
<FONT color="green">705</FONT>                xjexl = new JexlException(info, "failed executing method " + meth, xany);<a name="line.705"></a>
<FONT color="green">706</FONT>            } finally {<a name="line.706"></a>
<FONT color="green">707</FONT>                if (xjexl != null) {<a name="line.707"></a>
<FONT color="green">708</FONT>                    if (silent) {<a name="line.708"></a>
<FONT color="green">709</FONT>                        logger.warn(xjexl.getMessage(), xjexl.getCause());<a name="line.709"></a>
<FONT color="green">710</FONT>                        return null;<a name="line.710"></a>
<FONT color="green">711</FONT>                    }<a name="line.711"></a>
<FONT color="green">712</FONT>                    throw xjexl;<a name="line.712"></a>
<FONT color="green">713</FONT>                }<a name="line.713"></a>
<FONT color="green">714</FONT>            }<a name="line.714"></a>
<FONT color="green">715</FONT>            return result;<a name="line.715"></a>
<FONT color="green">716</FONT>        }<a name="line.716"></a>
<FONT color="green">717</FONT>    <a name="line.717"></a>
<FONT color="green">718</FONT>        /**<a name="line.718"></a>
<FONT color="green">719</FONT>         * Creates a new instance of an object using the most appropriate constructor<a name="line.719"></a>
<FONT color="green">720</FONT>         * based on the arguments.<a name="line.720"></a>
<FONT color="green">721</FONT>         * @param &lt;T&gt; the type of object<a name="line.721"></a>
<FONT color="green">722</FONT>         * @param clazz the class to instantiate<a name="line.722"></a>
<FONT color="green">723</FONT>         * @param args the constructor arguments<a name="line.723"></a>
<FONT color="green">724</FONT>         * @return the created object instance or null on failure when silent<a name="line.724"></a>
<FONT color="green">725</FONT>         */<a name="line.725"></a>
<FONT color="green">726</FONT>        public &lt;T&gt; T newInstance(Class&lt;? extends T&gt; clazz, Object... args) {<a name="line.726"></a>
<FONT color="green">727</FONT>            return clazz.cast(doCreateInstance(clazz, args));<a name="line.727"></a>
<FONT color="green">728</FONT>        }<a name="line.728"></a>
<FONT color="green">729</FONT>    <a name="line.729"></a>
<FONT color="green">730</FONT>        /**<a name="line.730"></a>
<FONT color="green">731</FONT>         * Creates a new instance of an object using the most appropriate constructor<a name="line.731"></a>
<FONT color="green">732</FONT>         * based on the arguments.<a name="line.732"></a>
<FONT color="green">733</FONT>         * @param clazz the name of the class to instantiate resolved through this engine's class loader<a name="line.733"></a>
<FONT color="green">734</FONT>         * @param args the constructor arguments<a name="line.734"></a>
<FONT color="green">735</FONT>         * @return the created object instance or null on failure when silent<a name="line.735"></a>
<FONT color="green">736</FONT>         */<a name="line.736"></a>
<FONT color="green">737</FONT>        public Object newInstance(String clazz, Object... args) {<a name="line.737"></a>
<FONT color="green">738</FONT>            return doCreateInstance(clazz, args);<a name="line.738"></a>
<FONT color="green">739</FONT>        }<a name="line.739"></a>
<FONT color="green">740</FONT>    <a name="line.740"></a>
<FONT color="green">741</FONT>        /**<a name="line.741"></a>
<FONT color="green">742</FONT>         * Creates a new instance of an object using the most appropriate constructor<a name="line.742"></a>
<FONT color="green">743</FONT>         * based on the arguments.<a name="line.743"></a>
<FONT color="green">744</FONT>         * @param clazz the class to instantiate<a name="line.744"></a>
<FONT color="green">745</FONT>         * @param args the constructor arguments<a name="line.745"></a>
<FONT color="green">746</FONT>         * @return the created object instance or null on failure when silent<a name="line.746"></a>
<FONT color="green">747</FONT>         */<a name="line.747"></a>
<FONT color="green">748</FONT>        protected Object doCreateInstance(Object clazz, Object... args) {<a name="line.748"></a>
<FONT color="green">749</FONT>            JexlException xjexl = null;<a name="line.749"></a>
<FONT color="green">750</FONT>            Object result = null;<a name="line.750"></a>
<FONT color="green">751</FONT>            JexlInfo info = debugInfo();<a name="line.751"></a>
<FONT color="green">752</FONT>            try {<a name="line.752"></a>
<FONT color="green">753</FONT>                JexlMethod ctor = uberspect.getConstructorMethod(clazz, args, info);<a name="line.753"></a>
<FONT color="green">754</FONT>                if (ctor == null &amp;&amp; arithmetic.narrowArguments(args)) {<a name="line.754"></a>
<FONT color="green">755</FONT>                    ctor = uberspect.getConstructorMethod(clazz, args, info);<a name="line.755"></a>
<FONT color="green">756</FONT>                }<a name="line.756"></a>
<FONT color="green">757</FONT>                if (ctor != null) {<a name="line.757"></a>
<FONT color="green">758</FONT>                    result = ctor.invoke(clazz, args);<a name="line.758"></a>
<FONT color="green">759</FONT>                } else {<a name="line.759"></a>
<FONT color="green">760</FONT>                    xjexl = new JexlException(info, "failed finding constructor for " + clazz.toString());<a name="line.760"></a>
<FONT color="green">761</FONT>                }<a name="line.761"></a>
<FONT color="green">762</FONT>            } catch (Exception xany) {<a name="line.762"></a>
<FONT color="green">763</FONT>                xjexl = new JexlException(info, "failed executing constructor for " + clazz.toString(), xany);<a name="line.763"></a>
<FONT color="green">764</FONT>            } finally {<a name="line.764"></a>
<FONT color="green">765</FONT>                if (xjexl != null) {<a name="line.765"></a>
<FONT color="green">766</FONT>                    if (silent) {<a name="line.766"></a>
<FONT color="green">767</FONT>                        logger.warn(xjexl.getMessage(), xjexl.getCause());<a name="line.767"></a>
<FONT color="green">768</FONT>                        return null;<a name="line.768"></a>
<FONT color="green">769</FONT>                    }<a name="line.769"></a>
<FONT color="green">770</FONT>                    throw xjexl;<a name="line.770"></a>
<FONT color="green">771</FONT>                }<a name="line.771"></a>
<FONT color="green">772</FONT>            }<a name="line.772"></a>
<FONT color="green">773</FONT>            return result;<a name="line.773"></a>
<FONT color="green">774</FONT>        }<a name="line.774"></a>
<FONT color="green">775</FONT>    <a name="line.775"></a>
<FONT color="green">776</FONT>        /**<a name="line.776"></a>
<FONT color="green">777</FONT>         * Creates an interpreter.<a name="line.777"></a>
<FONT color="green">778</FONT>         * @param context a JexlContext; if null, the EMPTY_CONTEXT is used instead.<a name="line.778"></a>
<FONT color="green">779</FONT>         * @return an Interpreter<a name="line.779"></a>
<FONT color="green">780</FONT>         */<a name="line.780"></a>
<FONT color="green">781</FONT>        protected Interpreter createInterpreter(JexlContext context) {<a name="line.781"></a>
<FONT color="green">782</FONT>            return createInterpreter(context, isStrict(), isSilent());<a name="line.782"></a>
<FONT color="green">783</FONT>        }<a name="line.783"></a>
<FONT color="green">784</FONT>    <a name="line.784"></a>
<FONT color="green">785</FONT>        /**<a name="line.785"></a>
<FONT color="green">786</FONT>         * Creates an interpreter.<a name="line.786"></a>
<FONT color="green">787</FONT>         * @param context a JexlContext; if null, the EMPTY_CONTEXT is used instead.<a name="line.787"></a>
<FONT color="green">788</FONT>         * @param strictFlag whether the interpreter runs in strict mode<a name="line.788"></a>
<FONT color="green">789</FONT>         * @param silentFlag whether the interpreter runs in silent mode<a name="line.789"></a>
<FONT color="green">790</FONT>         * @return an Interpreter<a name="line.790"></a>
<FONT color="green">791</FONT>         * @since 2.1<a name="line.791"></a>
<FONT color="green">792</FONT>         */<a name="line.792"></a>
<FONT color="green">793</FONT>        protected Interpreter createInterpreter(JexlContext context, boolean strictFlag, boolean silentFlag) {<a name="line.793"></a>
<FONT color="green">794</FONT>            return new Interpreter(this, context == null ? EMPTY_CONTEXT : context, strictFlag, silentFlag);<a name="line.794"></a>
<FONT color="green">795</FONT>        }<a name="line.795"></a>
<FONT color="green">796</FONT>    <a name="line.796"></a>
<FONT color="green">797</FONT>        /**<a name="line.797"></a>
<FONT color="green">798</FONT>         * A soft reference on cache.<a name="line.798"></a>
<FONT color="green">799</FONT>         * &lt;p&gt;The cache is held through a soft reference, allowing it to be GCed under<a name="line.799"></a>
<FONT color="green">800</FONT>         * memory pressure.&lt;/p&gt;<a name="line.800"></a>
<FONT color="green">801</FONT>         * @param &lt;K&gt; the cache key entry type<a name="line.801"></a>
<FONT color="green">802</FONT>         * @param &lt;V&gt; the cache key value type<a name="line.802"></a>
<FONT color="green">803</FONT>         */<a name="line.803"></a>
<FONT color="green">804</FONT>        protected class SoftCache&lt;K, V&gt; {<a name="line.804"></a>
<FONT color="green">805</FONT>            /**<a name="line.805"></a>
<FONT color="green">806</FONT>             * The cache size.<a name="line.806"></a>
<FONT color="green">807</FONT>             */<a name="line.807"></a>
<FONT color="green">808</FONT>            private final int size;<a name="line.808"></a>
<FONT color="green">809</FONT>            /**<a name="line.809"></a>
<FONT color="green">810</FONT>             * The soft reference to the cache map.<a name="line.810"></a>
<FONT color="green">811</FONT>             */<a name="line.811"></a>
<FONT color="green">812</FONT>            private SoftReference&lt;Map&lt;K, V&gt;&gt; ref = null;<a name="line.812"></a>
<FONT color="green">813</FONT>    <a name="line.813"></a>
<FONT color="green">814</FONT>            /**<a name="line.814"></a>
<FONT color="green">815</FONT>             * Creates a new instance of a soft cache.<a name="line.815"></a>
<FONT color="green">816</FONT>             * @param theSize the cache size<a name="line.816"></a>
<FONT color="green">817</FONT>             */<a name="line.817"></a>
<FONT color="green">818</FONT>            SoftCache(int theSize) {<a name="line.818"></a>
<FONT color="green">819</FONT>                size = theSize;<a name="line.819"></a>
<FONT color="green">820</FONT>            }<a name="line.820"></a>
<FONT color="green">821</FONT>    <a name="line.821"></a>
<FONT color="green">822</FONT>            /**<a name="line.822"></a>
<FONT color="green">823</FONT>             * Returns the cache size.<a name="line.823"></a>
<FONT color="green">824</FONT>             * @return the cache size<a name="line.824"></a>
<FONT color="green">825</FONT>             */<a name="line.825"></a>
<FONT color="green">826</FONT>            int size() {<a name="line.826"></a>
<FONT color="green">827</FONT>                return size;<a name="line.827"></a>
<FONT color="green">828</FONT>            }<a name="line.828"></a>
<FONT color="green">829</FONT>    <a name="line.829"></a>
<FONT color="green">830</FONT>            /**<a name="line.830"></a>
<FONT color="green">831</FONT>             * Clears the cache.<a name="line.831"></a>
<FONT color="green">832</FONT>             */<a name="line.832"></a>
<FONT color="green">833</FONT>            void clear() {<a name="line.833"></a>
<FONT color="green">834</FONT>                ref = null;<a name="line.834"></a>
<FONT color="green">835</FONT>            }<a name="line.835"></a>
<FONT color="green">836</FONT>    <a name="line.836"></a>
<FONT color="green">837</FONT>            /**<a name="line.837"></a>
<FONT color="green">838</FONT>             * Produces the cache entry set.<a name="line.838"></a>
<FONT color="green">839</FONT>             * @return the cache entry set<a name="line.839"></a>
<FONT color="green">840</FONT>             */<a name="line.840"></a>
<FONT color="green">841</FONT>            Set&lt;Entry&lt;K, V&gt;&gt; entrySet() {<a name="line.841"></a>
<FONT color="green">842</FONT>                Map&lt;K, V&gt; map = ref != null ? ref.get() : null;<a name="line.842"></a>
<FONT color="green">843</FONT>                return map != null ? map.entrySet() : Collections.&lt;Entry&lt;K, V&gt;&gt;emptySet();<a name="line.843"></a>
<FONT color="green">844</FONT>            }<a name="line.844"></a>
<FONT color="green">845</FONT>    <a name="line.845"></a>
<FONT color="green">846</FONT>            /**<a name="line.846"></a>
<FONT color="green">847</FONT>             * Gets a value from cache.<a name="line.847"></a>
<FONT color="green">848</FONT>             * @param key the cache entry key<a name="line.848"></a>
<FONT color="green">849</FONT>             * @return the cache entry value<a name="line.849"></a>
<FONT color="green">850</FONT>             */<a name="line.850"></a>
<FONT color="green">851</FONT>            V get(K key) {<a name="line.851"></a>
<FONT color="green">852</FONT>                final Map&lt;K, V&gt; map = ref != null ? ref.get() : null;<a name="line.852"></a>
<FONT color="green">853</FONT>                return map != null ? map.get(key) : null;<a name="line.853"></a>
<FONT color="green">854</FONT>            }<a name="line.854"></a>
<FONT color="green">855</FONT>    <a name="line.855"></a>
<FONT color="green">856</FONT>            /**<a name="line.856"></a>
<FONT color="green">857</FONT>             * Puts a value in cache.<a name="line.857"></a>
<FONT color="green">858</FONT>             * @param key the cache entry key<a name="line.858"></a>
<FONT color="green">859</FONT>             * @param script the cache entry value<a name="line.859"></a>
<FONT color="green">860</FONT>             */<a name="line.860"></a>
<FONT color="green">861</FONT>            void put(K key, V script) {<a name="line.861"></a>
<FONT color="green">862</FONT>                Map&lt;K, V&gt; map = ref != null ? ref.get() : null;<a name="line.862"></a>
<FONT color="green">863</FONT>                if (map == null) {<a name="line.863"></a>
<FONT color="green">864</FONT>                    map = createCache(size);<a name="line.864"></a>
<FONT color="green">865</FONT>                    ref = new SoftReference&lt;Map&lt;K, V&gt;&gt;(map);<a name="line.865"></a>
<FONT color="green">866</FONT>                }<a name="line.866"></a>
<FONT color="green">867</FONT>                map.put(key, script);<a name="line.867"></a>
<FONT color="green">868</FONT>            }<a name="line.868"></a>
<FONT color="green">869</FONT>        }<a name="line.869"></a>
<FONT color="green">870</FONT>    <a name="line.870"></a>
<FONT color="green">871</FONT>        /**<a name="line.871"></a>
<FONT color="green">872</FONT>         * Creates a cache.<a name="line.872"></a>
<FONT color="green">873</FONT>         * @param &lt;K&gt; the key type<a name="line.873"></a>
<FONT color="green">874</FONT>         * @param &lt;V&gt; the value type<a name="line.874"></a>
<FONT color="green">875</FONT>         * @param cacheSize the cache size, must be &gt; 0<a name="line.875"></a>
<FONT color="green">876</FONT>         * @return a Map usable as a cache bounded to the given size<a name="line.876"></a>
<FONT color="green">877</FONT>         */<a name="line.877"></a>
<FONT color="green">878</FONT>        protected &lt;K, V&gt; Map&lt;K, V&gt; createCache(final int cacheSize) {<a name="line.878"></a>
<FONT color="green">879</FONT>            return new java.util.LinkedHashMap&lt;K, V&gt;(cacheSize, LOAD_FACTOR, true) {<a name="line.879"></a>
<FONT color="green">880</FONT>                /** Serial version UID. */<a name="line.880"></a>
<FONT color="green">881</FONT>                private static final long serialVersionUID = 1L;<a name="line.881"></a>
<FONT color="green">882</FONT>    <a name="line.882"></a>
<FONT color="green">883</FONT>                @Override<a name="line.883"></a>
<FONT color="green">884</FONT>                protected boolean removeEldestEntry(Map.Entry&lt;K, V&gt; eldest) {<a name="line.884"></a>
<FONT color="green">885</FONT>                    return size() &gt; cacheSize;<a name="line.885"></a>
<FONT color="green">886</FONT>                }<a name="line.886"></a>
<FONT color="green">887</FONT>            };<a name="line.887"></a>
<FONT color="green">888</FONT>        }<a name="line.888"></a>
<FONT color="green">889</FONT>    <a name="line.889"></a>
<FONT color="green">890</FONT>        /**<a name="line.890"></a>
<FONT color="green">891</FONT>         * Clears the expression cache.<a name="line.891"></a>
<FONT color="green">892</FONT>         * @since 2.1<a name="line.892"></a>
<FONT color="green">893</FONT>         */<a name="line.893"></a>
<FONT color="green">894</FONT>        public void clearCache() {<a name="line.894"></a>
<FONT color="green">895</FONT>            synchronized (parser) {<a name="line.895"></a>
<FONT color="green">896</FONT>                cache.clear();<a name="line.896"></a>
<FONT color="green">897</FONT>            }<a name="line.897"></a>
<FONT color="green">898</FONT>        }<a name="line.898"></a>
<FONT color="green">899</FONT>    <a name="line.899"></a>
<FONT color="green">900</FONT>        /**<a name="line.900"></a>
<FONT color="green">901</FONT>         * Gets the list of variables accessed by a script.<a name="line.901"></a>
<FONT color="green">902</FONT>         * &lt;p&gt;This method will visit all nodes of a script and extract all variables whether they<a name="line.902"></a>
<FONT color="green">903</FONT>         * are written in 'dot' or 'bracketed' notation. (a.b is equivalent to a['b']).&lt;/p&gt;<a name="line.903"></a>
<FONT color="green">904</FONT>         * @param script the script<a name="line.904"></a>
<FONT color="green">905</FONT>         * @return the set of variables, each as a list of strings (ant-ish variables use more than 1 string)<a name="line.905"></a>
<FONT color="green">906</FONT>         *         or the empty set if no variables are used<a name="line.906"></a>
<FONT color="green">907</FONT>         * @since 2.1<a name="line.907"></a>
<FONT color="green">908</FONT>         */<a name="line.908"></a>
<FONT color="green">909</FONT>        public Set&lt;List&lt;String&gt;&gt; getVariables(Script script) {<a name="line.909"></a>
<FONT color="green">910</FONT>            if (script instanceof ExpressionImpl) {<a name="line.910"></a>
<FONT color="green">911</FONT>                Set&lt;List&lt;String&gt;&gt; refs = new LinkedHashSet&lt;List&lt;String&gt;&gt;();<a name="line.911"></a>
<FONT color="green">912</FONT>                getVariables(((ExpressionImpl) script).script, refs, null);<a name="line.912"></a>
<FONT color="green">913</FONT>                return refs;<a name="line.913"></a>
<FONT color="green">914</FONT>            } else {<a name="line.914"></a>
<FONT color="green">915</FONT>                return Collections.&lt;List&lt;String&gt;&gt;emptySet();<a name="line.915"></a>
<FONT color="green">916</FONT>            }<a name="line.916"></a>
<FONT color="green">917</FONT>        }<a name="line.917"></a>
<FONT color="green">918</FONT>    <a name="line.918"></a>
<FONT color="green">919</FONT>        /**<a name="line.919"></a>
<FONT color="green">920</FONT>         * Fills up the list of variables accessed by a node.<a name="line.920"></a>
<FONT color="green">921</FONT>         * @param node the node<a name="line.921"></a>
<FONT color="green">922</FONT>         * @param refs the set of variable being filled<a name="line.922"></a>
<FONT color="green">923</FONT>         * @param ref the current variable being filled<a name="line.923"></a>
<FONT color="green">924</FONT>         * @since 2.1<a name="line.924"></a>
<FONT color="green">925</FONT>         */<a name="line.925"></a>
<FONT color="green">926</FONT>        protected void getVariables(JexlNode node, Set&lt;List&lt;String&gt;&gt; refs, List&lt;String&gt; ref) {<a name="line.926"></a>
<FONT color="green">927</FONT>            boolean array = node instanceof ASTArrayAccess;<a name="line.927"></a>
<FONT color="green">928</FONT>            boolean reference = node instanceof ASTReference;<a name="line.928"></a>
<FONT color="green">929</FONT>            int num = node.jjtGetNumChildren();<a name="line.929"></a>
<FONT color="green">930</FONT>            if (array || reference) {<a name="line.930"></a>
<FONT color="green">931</FONT>                List&lt;String&gt; var = ref != null ? ref : new ArrayList&lt;String&gt;();<a name="line.931"></a>
<FONT color="green">932</FONT>                boolean varf = true;<a name="line.932"></a>
<FONT color="green">933</FONT>                for (int i = 0; i &lt; num; ++i) {<a name="line.933"></a>
<FONT color="green">934</FONT>                    JexlNode child = node.jjtGetChild(i);<a name="line.934"></a>
<FONT color="green">935</FONT>                    if (array) {<a name="line.935"></a>
<FONT color="green">936</FONT>                        if (child instanceof ASTReference &amp;&amp; child.jjtGetNumChildren() == 1) {<a name="line.936"></a>
<FONT color="green">937</FONT>                            JexlNode desc = child.jjtGetChild(0);<a name="line.937"></a>
<FONT color="green">938</FONT>                            if (varf &amp;&amp; desc.isConstant()) {<a name="line.938"></a>
<FONT color="green">939</FONT>                                String image = desc.image;<a name="line.939"></a>
<FONT color="green">940</FONT>                                if (image == null) {<a name="line.940"></a>
<FONT color="green">941</FONT>                                    var.add(new Debugger().data(desc));<a name="line.941"></a>
<FONT color="green">942</FONT>                                } else {<a name="line.942"></a>
<FONT color="green">943</FONT>                                    var.add(image); <a name="line.943"></a>
<FONT color="green">944</FONT>                                }<a name="line.944"></a>
<FONT color="green">945</FONT>                            } else if (desc instanceof ASTIdentifier) {<a name="line.945"></a>
<FONT color="green">946</FONT>                                if (((ASTIdentifier) desc).getRegister() &lt; 0) {<a name="line.946"></a>
<FONT color="green">947</FONT>                                    List&lt;String&gt; di = new ArrayList&lt;String&gt;(1);<a name="line.947"></a>
<FONT color="green">948</FONT>                                    di.add(desc.image);<a name="line.948"></a>
<FONT color="green">949</FONT>                                    refs.add(di);<a name="line.949"></a>
<FONT color="green">950</FONT>                                }<a name="line.950"></a>
<FONT color="green">951</FONT>                                var = new ArrayList&lt;String&gt;();<a name="line.951"></a>
<FONT color="green">952</FONT>                                varf = false;<a name="line.952"></a>
<FONT color="green">953</FONT>                            }<a name="line.953"></a>
<FONT color="green">954</FONT>                            continue;<a name="line.954"></a>
<FONT color="green">955</FONT>                        } else if (child instanceof ASTIdentifier) {<a name="line.955"></a>
<FONT color="green">956</FONT>                            if (i == 0 &amp;&amp; (((ASTIdentifier) child).getRegister() &lt; 0)) {<a name="line.956"></a>
<FONT color="green">957</FONT>                                var.add(child.image);<a name="line.957"></a>
<FONT color="green">958</FONT>                            }<a name="line.958"></a>
<FONT color="green">959</FONT>                            continue;<a name="line.959"></a>
<FONT color="green">960</FONT>                        }<a name="line.960"></a>
<FONT color="green">961</FONT>                    } else {//if (reference) {<a name="line.961"></a>
<FONT color="green">962</FONT>                        if (child instanceof ASTIdentifier) {<a name="line.962"></a>
<FONT color="green">963</FONT>                            if (((ASTIdentifier) child).getRegister() &lt; 0) {<a name="line.963"></a>
<FONT color="green">964</FONT>                                var.add(child.image);<a name="line.964"></a>
<FONT color="green">965</FONT>                            }<a name="line.965"></a>
<FONT color="green">966</FONT>                            continue;<a name="line.966"></a>
<FONT color="green">967</FONT>                        }<a name="line.967"></a>
<FONT color="green">968</FONT>                    }<a name="line.968"></a>
<FONT color="green">969</FONT>                    getVariables(child, refs, var);<a name="line.969"></a>
<FONT color="green">970</FONT>                }<a name="line.970"></a>
<FONT color="green">971</FONT>                if (!var.isEmpty() &amp;&amp; var != ref) {<a name="line.971"></a>
<FONT color="green">972</FONT>                    refs.add(var);<a name="line.972"></a>
<FONT color="green">973</FONT>                }<a name="line.973"></a>
<FONT color="green">974</FONT>            } else {<a name="line.974"></a>
<FONT color="green">975</FONT>                for (int i = 0; i &lt; num; ++i) {<a name="line.975"></a>
<FONT color="green">976</FONT>                    getVariables(node.jjtGetChild(i), refs, null);<a name="line.976"></a>
<FONT color="green">977</FONT>                }<a name="line.977"></a>
<FONT color="green">978</FONT>            }<a name="line.978"></a>
<FONT color="green">979</FONT>        }<a name="line.979"></a>
<FONT color="green">980</FONT>    <a name="line.980"></a>
<FONT color="green">981</FONT>        /**<a name="line.981"></a>
<FONT color="green">982</FONT>         * Gets the array of parameters from a script.<a name="line.982"></a>
<FONT color="green">983</FONT>         * @param script the script<a name="line.983"></a>
<FONT color="green">984</FONT>         * @return the parameters which may be empty (but not null) if no parameters were defined<a name="line.984"></a>
<FONT color="green">985</FONT>         * @since 2.1<a name="line.985"></a>
<FONT color="green">986</FONT>         */<a name="line.986"></a>
<FONT color="green">987</FONT>        protected String[] getParameters(Script script) {<a name="line.987"></a>
<FONT color="green">988</FONT>            if (script instanceof ExpressionImpl) {<a name="line.988"></a>
<FONT color="green">989</FONT>                return ((ExpressionImpl) script).getParameters();<a name="line.989"></a>
<FONT color="green">990</FONT>            } else {<a name="line.990"></a>
<FONT color="green">991</FONT>                return new String[0];<a name="line.991"></a>
<FONT color="green">992</FONT>            }<a name="line.992"></a>
<FONT color="green">993</FONT>        }<a name="line.993"></a>
<FONT color="green">994</FONT>    <a name="line.994"></a>
<FONT color="green">995</FONT>        /**<a name="line.995"></a>
<FONT color="green">996</FONT>         * Gets the array of local variable from a script.<a name="line.996"></a>
<FONT color="green">997</FONT>         * @param script the script<a name="line.997"></a>
<FONT color="green">998</FONT>         * @return the local variables array which may be empty (but not null) if no local variables were defined<a name="line.998"></a>
<FONT color="green">999</FONT>         * @since 2.1<a name="line.999"></a>
<FONT color="green">1000</FONT>         */<a name="line.1000"></a>
<FONT color="green">1001</FONT>        protected String[] getLocalVariables(Script script) {<a name="line.1001"></a>
<FONT color="green">1002</FONT>            if (script instanceof ExpressionImpl) {<a name="line.1002"></a>
<FONT color="green">1003</FONT>                return ((ExpressionImpl) script).getLocalVariables();<a name="line.1003"></a>
<FONT color="green">1004</FONT>            } else {<a name="line.1004"></a>
<FONT color="green">1005</FONT>                return new String[0];<a name="line.1005"></a>
<FONT color="green">1006</FONT>            }<a name="line.1006"></a>
<FONT color="green">1007</FONT>        }<a name="line.1007"></a>
<FONT color="green">1008</FONT>    <a name="line.1008"></a>
<FONT color="green">1009</FONT>        /**<a name="line.1009"></a>
<FONT color="green">1010</FONT>         * A script scope, stores the declaration of parameters and local variables.<a name="line.1010"></a>
<FONT color="green">1011</FONT>         * @since 2.1<a name="line.1011"></a>
<FONT color="green">1012</FONT>         */<a name="line.1012"></a>
<FONT color="green">1013</FONT>        public static final class Scope {<a name="line.1013"></a>
<FONT color="green">1014</FONT>            /**<a name="line.1014"></a>
<FONT color="green">1015</FONT>             * The number of parameters.<a name="line.1015"></a>
<FONT color="green">1016</FONT>             */<a name="line.1016"></a>
<FONT color="green">1017</FONT>            private final int parms;<a name="line.1017"></a>
<FONT color="green">1018</FONT>            /**<a name="line.1018"></a>
<FONT color="green">1019</FONT>             * The map of named registers aka script parameters.<a name="line.1019"></a>
<FONT color="green">1020</FONT>             * Each parameter is associated to a register and is materialized as an offset in the registers array used<a name="line.1020"></a>
<FONT color="green">1021</FONT>             * during evaluation.<a name="line.1021"></a>
<FONT color="green">1022</FONT>             */<a name="line.1022"></a>
<FONT color="green">1023</FONT>            private Map&lt;String, Integer&gt; namedRegisters = null;<a name="line.1023"></a>
<FONT color="green">1024</FONT>    <a name="line.1024"></a>
<FONT color="green">1025</FONT>            /**<a name="line.1025"></a>
<FONT color="green">1026</FONT>             * Creates a new scope with a list of parameters.<a name="line.1026"></a>
<FONT color="green">1027</FONT>             * @param parameters the list of parameters<a name="line.1027"></a>
<FONT color="green">1028</FONT>             */<a name="line.1028"></a>
<FONT color="green">1029</FONT>            public Scope(String... parameters) {<a name="line.1029"></a>
<FONT color="green">1030</FONT>                if (parameters != null) {<a name="line.1030"></a>
<FONT color="green">1031</FONT>                    parms = parameters.length;<a name="line.1031"></a>
<FONT color="green">1032</FONT>                    namedRegisters = new LinkedHashMap&lt;String, Integer&gt;();<a name="line.1032"></a>
<FONT color="green">1033</FONT>                    for (int p = 0; p &lt; parms; ++p) {<a name="line.1033"></a>
<FONT color="green">1034</FONT>                        namedRegisters.put(parameters[p], Integer.valueOf(p));<a name="line.1034"></a>
<FONT color="green">1035</FONT>                    }<a name="line.1035"></a>
<FONT color="green">1036</FONT>                } else {<a name="line.1036"></a>
<FONT color="green">1037</FONT>                    parms = 0;<a name="line.1037"></a>
<FONT color="green">1038</FONT>                }<a name="line.1038"></a>
<FONT color="green">1039</FONT>            }<a name="line.1039"></a>
<FONT color="green">1040</FONT>    <a name="line.1040"></a>
<FONT color="green">1041</FONT>            @Override<a name="line.1041"></a>
<FONT color="green">1042</FONT>            public int hashCode() {<a name="line.1042"></a>
<FONT color="green">1043</FONT>                return namedRegisters == null ? 0 : parms ^ namedRegisters.hashCode();<a name="line.1043"></a>
<FONT color="green">1044</FONT>            }<a name="line.1044"></a>
<FONT color="green">1045</FONT>    <a name="line.1045"></a>
<FONT color="green">1046</FONT>            @Override<a name="line.1046"></a>
<FONT color="green">1047</FONT>            public boolean equals(Object o) {<a name="line.1047"></a>
<FONT color="green">1048</FONT>                return o instanceof Scope &amp;&amp; equals((Scope) o);<a name="line.1048"></a>
<FONT color="green">1049</FONT>            }<a name="line.1049"></a>
<FONT color="green">1050</FONT>    <a name="line.1050"></a>
<FONT color="green">1051</FONT>            /**<a name="line.1051"></a>
<FONT color="green">1052</FONT>             * Whether this frame is equal to another.<a name="line.1052"></a>
<FONT color="green">1053</FONT>             * @param frame the frame to compare to<a name="line.1053"></a>
<FONT color="green">1054</FONT>             * @return true if equal, false otherwise<a name="line.1054"></a>
<FONT color="green">1055</FONT>             */<a name="line.1055"></a>
<FONT color="green">1056</FONT>            public boolean equals(Scope frame) {<a name="line.1056"></a>
<FONT color="green">1057</FONT>                if (this == frame) {<a name="line.1057"></a>
<FONT color="green">1058</FONT>                    return true;<a name="line.1058"></a>
<FONT color="green">1059</FONT>                } else if (frame == null || parms != frame.parms) {<a name="line.1059"></a>
<FONT color="green">1060</FONT>                    return false;<a name="line.1060"></a>
<FONT color="green">1061</FONT>                } else if (namedRegisters == null) {<a name="line.1061"></a>
<FONT color="green">1062</FONT>                    return frame.namedRegisters == null;<a name="line.1062"></a>
<FONT color="green">1063</FONT>                } else {<a name="line.1063"></a>
<FONT color="green">1064</FONT>                    return namedRegisters.equals(frame.namedRegisters);<a name="line.1064"></a>
<FONT color="green">1065</FONT>                }<a name="line.1065"></a>
<FONT color="green">1066</FONT>            }<a name="line.1066"></a>
<FONT color="green">1067</FONT>    <a name="line.1067"></a>
<FONT color="green">1068</FONT>            /**<a name="line.1068"></a>
<FONT color="green">1069</FONT>             * Checks whether an identifier is a local variable or argument, ie stored in a register. <a name="line.1069"></a>
<FONT color="green">1070</FONT>             * @param name the register name<a name="line.1070"></a>
<FONT color="green">1071</FONT>             * @return the register index<a name="line.1071"></a>
<FONT color="green">1072</FONT>             */<a name="line.1072"></a>
<FONT color="green">1073</FONT>            public Integer getRegister(String name) {<a name="line.1073"></a>
<FONT color="green">1074</FONT>                return namedRegisters != null ? namedRegisters.get(name) : null;<a name="line.1074"></a>
<FONT color="green">1075</FONT>            }<a name="line.1075"></a>
<FONT color="green">1076</FONT>    <a name="line.1076"></a>
<FONT color="green">1077</FONT>            /**<a name="line.1077"></a>
<FONT color="green">1078</FONT>             * Declares a local variable.<a name="line.1078"></a>
<FONT color="green">1079</FONT>             * &lt;p&gt;<a name="line.1079"></a>
<FONT color="green">1080</FONT>             * This method creates an new entry in the named register map.<a name="line.1080"></a>
<FONT color="green">1081</FONT>             * &lt;/p&gt;<a name="line.1081"></a>
<FONT color="green">1082</FONT>             * @param name the variable name<a name="line.1082"></a>
<FONT color="green">1083</FONT>             * @return the register index storing this variable<a name="line.1083"></a>
<FONT color="green">1084</FONT>             */<a name="line.1084"></a>
<FONT color="green">1085</FONT>            public Integer declareVariable(String name) {<a name="line.1085"></a>
<FONT color="green">1086</FONT>                if (namedRegisters == null) {<a name="line.1086"></a>
<FONT color="green">1087</FONT>                    namedRegisters = new LinkedHashMap&lt;String, Integer&gt;();<a name="line.1087"></a>
<FONT color="green">1088</FONT>                }<a name="line.1088"></a>
<FONT color="green">1089</FONT>                Integer register = namedRegisters.get(name);<a name="line.1089"></a>
<FONT color="green">1090</FONT>                if (register == null) {<a name="line.1090"></a>
<FONT color="green">1091</FONT>                    register = Integer.valueOf(namedRegisters.size());<a name="line.1091"></a>
<FONT color="green">1092</FONT>                    namedRegisters.put(name, register);<a name="line.1092"></a>
<FONT color="green">1093</FONT>                }<a name="line.1093"></a>
<FONT color="green">1094</FONT>                return register;<a name="line.1094"></a>
<FONT color="green">1095</FONT>            }<a name="line.1095"></a>
<FONT color="green">1096</FONT>    <a name="line.1096"></a>
<FONT color="green">1097</FONT>            /**<a name="line.1097"></a>
<FONT color="green">1098</FONT>             * Creates a frame by copying values up to the number of parameters.<a name="line.1098"></a>
<FONT color="green">1099</FONT>             * @param values the argument values<a name="line.1099"></a>
<FONT color="green">1100</FONT>             * @return the arguments array<a name="line.1100"></a>
<FONT color="green">1101</FONT>             */<a name="line.1101"></a>
<FONT color="green">1102</FONT>            public Frame createFrame(Object... values) {<a name="line.1102"></a>
<FONT color="green">1103</FONT>                if (namedRegisters != null) {<a name="line.1103"></a>
<FONT color="green">1104</FONT>                    Object[] arguments = new Object[namedRegisters.size()];<a name="line.1104"></a>
<FONT color="green">1105</FONT>                    if (values != null) {<a name="line.1105"></a>
<FONT color="green">1106</FONT>                        System.arraycopy(values, 0, arguments, 0, Math.min(parms, values.length));<a name="line.1106"></a>
<FONT color="green">1107</FONT>                    }<a name="line.1107"></a>
<FONT color="green">1108</FONT>                    return new Frame(arguments, namedRegisters.keySet().toArray(new String[0]));<a name="line.1108"></a>
<FONT color="green">1109</FONT>                } else {<a name="line.1109"></a>
<FONT color="green">1110</FONT>                    return null;<a name="line.1110"></a>
<FONT color="green">1111</FONT>                }<a name="line.1111"></a>
<FONT color="green">1112</FONT>            }<a name="line.1112"></a>
<FONT color="green">1113</FONT>    <a name="line.1113"></a>
<FONT color="green">1114</FONT>            /**<a name="line.1114"></a>
<FONT color="green">1115</FONT>             * Gets the (maximum) number of arguments this script expects.<a name="line.1115"></a>
<FONT color="green">1116</FONT>             * @return the number of parameters<a name="line.1116"></a>
<FONT color="green">1117</FONT>             */<a name="line.1117"></a>
<FONT color="green">1118</FONT>            public int getArgCount() {<a name="line.1118"></a>
<FONT color="green">1119</FONT>                return parms;<a name="line.1119"></a>
<FONT color="green">1120</FONT>            }<a name="line.1120"></a>
<FONT color="green">1121</FONT>    <a name="line.1121"></a>
<FONT color="green">1122</FONT>            /**<a name="line.1122"></a>
<FONT color="green">1123</FONT>             * Gets this script registers, i.e. parameters and local variables.<a name="line.1123"></a>
<FONT color="green">1124</FONT>             * @return the register names<a name="line.1124"></a>
<FONT color="green">1125</FONT>             */<a name="line.1125"></a>
<FONT color="green">1126</FONT>            public String[] getRegisters() {<a name="line.1126"></a>
<FONT color="green">1127</FONT>                return namedRegisters != null ? namedRegisters.keySet().toArray(new String[0]) : new String[0];<a name="line.1127"></a>
<FONT color="green">1128</FONT>            }<a name="line.1128"></a>
<FONT color="green">1129</FONT>    <a name="line.1129"></a>
<FONT color="green">1130</FONT>            /**<a name="line.1130"></a>
<FONT color="green">1131</FONT>             * Gets this script parameters, i.e. registers assigned before creating local variables.<a name="line.1131"></a>
<FONT color="green">1132</FONT>             * @return the parameter names<a name="line.1132"></a>
<FONT color="green">1133</FONT>             */<a name="line.1133"></a>
<FONT color="green">1134</FONT>            public String[] getParameters() {<a name="line.1134"></a>
<FONT color="green">1135</FONT>                if (namedRegisters != null &amp;&amp; parms &gt; 0) {<a name="line.1135"></a>
<FONT color="green">1136</FONT>                    String[] pa = new String[parms];<a name="line.1136"></a>
<FONT color="green">1137</FONT>                    int p = 0;<a name="line.1137"></a>
<FONT color="green">1138</FONT>                    for (Map.Entry&lt;String, Integer&gt; entry : namedRegisters.entrySet()) {<a name="line.1138"></a>
<FONT color="green">1139</FONT>                        if (entry.getValue().intValue() &lt; parms) {<a name="line.1139"></a>
<FONT color="green">1140</FONT>                            pa[p++] = entry.getKey();<a name="line.1140"></a>
<FONT color="green">1141</FONT>                        }<a name="line.1141"></a>
<FONT color="green">1142</FONT>                    }<a name="line.1142"></a>
<FONT color="green">1143</FONT>                    return pa;<a name="line.1143"></a>
<FONT color="green">1144</FONT>                } else {<a name="line.1144"></a>
<FONT color="green">1145</FONT>                    return null;<a name="line.1145"></a>
<FONT color="green">1146</FONT>                }<a name="line.1146"></a>
<FONT color="green">1147</FONT>            }<a name="line.1147"></a>
<FONT color="green">1148</FONT>    <a name="line.1148"></a>
<FONT color="green">1149</FONT>            /**<a name="line.1149"></a>
<FONT color="green">1150</FONT>             * Gets this script local variable, i.e. registers assigned to local variables.<a name="line.1150"></a>
<FONT color="green">1151</FONT>             * @return the parameter names<a name="line.1151"></a>
<FONT color="green">1152</FONT>             */<a name="line.1152"></a>
<FONT color="green">1153</FONT>            public String[] getLocalVariables() {<a name="line.1153"></a>
<FONT color="green">1154</FONT>                if (namedRegisters != null &amp;&amp; parms &gt; 0) {<a name="line.1154"></a>
<FONT color="green">1155</FONT>                    String[] pa = new String[parms];<a name="line.1155"></a>
<FONT color="green">1156</FONT>                    int p = 0;<a name="line.1156"></a>
<FONT color="green">1157</FONT>                    for (Map.Entry&lt;String, Integer&gt; entry : namedRegisters.entrySet()) {<a name="line.1157"></a>
<FONT color="green">1158</FONT>                        if (entry.getValue().intValue() &gt;= parms) {<a name="line.1158"></a>
<FONT color="green">1159</FONT>                            pa[p++] = entry.getKey();<a name="line.1159"></a>
<FONT color="green">1160</FONT>                        }<a name="line.1160"></a>
<FONT color="green">1161</FONT>                    }<a name="line.1161"></a>
<FONT color="green">1162</FONT>                    return pa;<a name="line.1162"></a>
<FONT color="green">1163</FONT>                } else {<a name="line.1163"></a>
<FONT color="green">1164</FONT>                    return null;<a name="line.1164"></a>
<FONT color="green">1165</FONT>                }<a name="line.1165"></a>
<FONT color="green">1166</FONT>            }<a name="line.1166"></a>
<FONT color="green">1167</FONT>        }<a name="line.1167"></a>
<FONT color="green">1168</FONT>    <a name="line.1168"></a>
<FONT color="green">1169</FONT>        /**<a name="line.1169"></a>
<FONT color="green">1170</FONT>         * A call frame, created from a scope, stores the arguments and local variables as "registers".<a name="line.1170"></a>
<FONT color="green">1171</FONT>         * @since 2.1<a name="line.1171"></a>
<FONT color="green">1172</FONT>         */<a name="line.1172"></a>
<FONT color="green">1173</FONT>        public static final class Frame {<a name="line.1173"></a>
<FONT color="green">1174</FONT>            /** Registers or arguments. */<a name="line.1174"></a>
<FONT color="green">1175</FONT>            private Object[] registers = null;<a name="line.1175"></a>
<FONT color="green">1176</FONT>            /** Parameter and argument names if any. */<a name="line.1176"></a>
<FONT color="green">1177</FONT>            private String[] parameters = null;<a name="line.1177"></a>
<FONT color="green">1178</FONT>            <a name="line.1178"></a>
<FONT color="green">1179</FONT>            /**<a name="line.1179"></a>
<FONT color="green">1180</FONT>             * Creates a new frame.<a name="line.1180"></a>
<FONT color="green">1181</FONT>             * @param r the registers<a name="line.1181"></a>
<FONT color="green">1182</FONT>             * @param p the parameters<a name="line.1182"></a>
<FONT color="green">1183</FONT>             */<a name="line.1183"></a>
<FONT color="green">1184</FONT>            Frame(Object[] r, String[] p) {<a name="line.1184"></a>
<FONT color="green">1185</FONT>                registers = r;<a name="line.1185"></a>
<FONT color="green">1186</FONT>                parameters = p;<a name="line.1186"></a>
<FONT color="green">1187</FONT>            }<a name="line.1187"></a>
<FONT color="green">1188</FONT>            <a name="line.1188"></a>
<FONT color="green">1189</FONT>            /**<a name="line.1189"></a>
<FONT color="green">1190</FONT>             * @return the registers<a name="line.1190"></a>
<FONT color="green">1191</FONT>             */<a name="line.1191"></a>
<FONT color="green">1192</FONT>            public Object[] getRegisters() {<a name="line.1192"></a>
<FONT color="green">1193</FONT>                return registers;<a name="line.1193"></a>
<FONT color="green">1194</FONT>            }<a name="line.1194"></a>
<FONT color="green">1195</FONT>                    <a name="line.1195"></a>
<FONT color="green">1196</FONT>            /**<a name="line.1196"></a>
<FONT color="green">1197</FONT>             * @return the parameters<a name="line.1197"></a>
<FONT color="green">1198</FONT>             */<a name="line.1198"></a>
<FONT color="green">1199</FONT>            public String[] getParameters() {<a name="line.1199"></a>
<FONT color="green">1200</FONT>                return parameters;<a name="line.1200"></a>
<FONT color="green">1201</FONT>            }<a name="line.1201"></a>
<FONT color="green">1202</FONT>        }<a name="line.1202"></a>
<FONT color="green">1203</FONT>    <a name="line.1203"></a>
<FONT color="green">1204</FONT>        /**<a name="line.1204"></a>
<FONT color="green">1205</FONT>         * Parses an expression.<a name="line.1205"></a>
<FONT color="green">1206</FONT>         * @param expression the expression to parse<a name="line.1206"></a>
<FONT color="green">1207</FONT>         * @param info debug information structure<a name="line.1207"></a>
<FONT color="green">1208</FONT>         * @return the parsed tree<a name="line.1208"></a>
<FONT color="green">1209</FONT>         * @throws JexlException if any error occured during parsing<a name="line.1209"></a>
<FONT color="green">1210</FONT>         * @deprecated Use {@link #parse(CharSequence, JexlInfo, Scope)} instead<a name="line.1210"></a>
<FONT color="green">1211</FONT>         */<a name="line.1211"></a>
<FONT color="green">1212</FONT>        @Deprecated<a name="line.1212"></a>
<FONT color="green">1213</FONT>        protected ASTJexlScript parse(CharSequence expression, JexlInfo info) {<a name="line.1213"></a>
<FONT color="green">1214</FONT>            return parse(expression, info, null);<a name="line.1214"></a>
<FONT color="green">1215</FONT>        }<a name="line.1215"></a>
<FONT color="green">1216</FONT>    <a name="line.1216"></a>
<FONT color="green">1217</FONT>        /**<a name="line.1217"></a>
<FONT color="green">1218</FONT>         * Parses an expression.<a name="line.1218"></a>
<FONT color="green">1219</FONT>         * @param expression the expression to parse<a name="line.1219"></a>
<FONT color="green">1220</FONT>         * @param info debug information structure<a name="line.1220"></a>
<FONT color="green">1221</FONT>         * @param frame the script frame to use<a name="line.1221"></a>
<FONT color="green">1222</FONT>         * @return the parsed tree<a name="line.1222"></a>
<FONT color="green">1223</FONT>         * @throws JexlException if any error occured during parsing<a name="line.1223"></a>
<FONT color="green">1224</FONT>         */<a name="line.1224"></a>
<FONT color="green">1225</FONT>        protected ASTJexlScript parse(CharSequence expression, JexlInfo info, Scope frame) {<a name="line.1225"></a>
<FONT color="green">1226</FONT>            String expr = cleanExpression(expression);<a name="line.1226"></a>
<FONT color="green">1227</FONT>            ASTJexlScript script = null;<a name="line.1227"></a>
<FONT color="green">1228</FONT>            JexlInfo dbgInfo = null;<a name="line.1228"></a>
<FONT color="green">1229</FONT>            synchronized (parser) {<a name="line.1229"></a>
<FONT color="green">1230</FONT>                if (cache != null) {<a name="line.1230"></a>
<FONT color="green">1231</FONT>                    script = cache.get(expr);<a name="line.1231"></a>
<FONT color="green">1232</FONT>                    if (script != null) {<a name="line.1232"></a>
<FONT color="green">1233</FONT>                        Scope f = script.getScope();<a name="line.1233"></a>
<FONT color="green">1234</FONT>                        if ((f == null &amp;&amp; frame == null) || (f != null &amp;&amp; f.equals(frame))) {<a name="line.1234"></a>
<FONT color="green">1235</FONT>                            return script;<a name="line.1235"></a>
<FONT color="green">1236</FONT>                        }<a name="line.1236"></a>
<FONT color="green">1237</FONT>                    }<a name="line.1237"></a>
<FONT color="green">1238</FONT>                }<a name="line.1238"></a>
<FONT color="green">1239</FONT>                try {<a name="line.1239"></a>
<FONT color="green">1240</FONT>                    Reader reader = new StringReader(expr);<a name="line.1240"></a>
<FONT color="green">1241</FONT>                    // use first calling method of JexlEngine as debug info<a name="line.1241"></a>
<FONT color="green">1242</FONT>                    if (info == null) {<a name="line.1242"></a>
<FONT color="green">1243</FONT>                        dbgInfo = debugInfo();<a name="line.1243"></a>
<FONT color="green">1244</FONT>                    } else {<a name="line.1244"></a>
<FONT color="green">1245</FONT>                        dbgInfo = info.debugInfo();<a name="line.1245"></a>
<FONT color="green">1246</FONT>                    }<a name="line.1246"></a>
<FONT color="green">1247</FONT>                    parser.setFrame(frame);<a name="line.1247"></a>
<FONT color="green">1248</FONT>                    script = parser.parse(reader, dbgInfo);<a name="line.1248"></a>
<FONT color="green">1249</FONT>                    // reaccess in case local variables have been declared<a name="line.1249"></a>
<FONT color="green">1250</FONT>                    frame = parser.getFrame();<a name="line.1250"></a>
<FONT color="green">1251</FONT>                    if (frame != null) {<a name="line.1251"></a>
<FONT color="green">1252</FONT>                        script.setScope(frame);<a name="line.1252"></a>
<FONT color="green">1253</FONT>                    }<a name="line.1253"></a>
<FONT color="green">1254</FONT>                    if (cache != null) {<a name="line.1254"></a>
<FONT color="green">1255</FONT>                        cache.put(expr, script);<a name="line.1255"></a>
<FONT color="green">1256</FONT>                    }<a name="line.1256"></a>
<FONT color="green">1257</FONT>                } catch (TokenMgrError xtme) {<a name="line.1257"></a>
<FONT color="green">1258</FONT>                    throw new JexlException.Tokenization(dbgInfo, expression, xtme);<a name="line.1258"></a>
<FONT color="green">1259</FONT>                } catch (ParseException xparse) {<a name="line.1259"></a>
<FONT color="green">1260</FONT>                    throw new JexlException.Parsing(dbgInfo, expression, xparse);<a name="line.1260"></a>
<FONT color="green">1261</FONT>                } finally {<a name="line.1261"></a>
<FONT color="green">1262</FONT>                    parser.setFrame(null);<a name="line.1262"></a>
<FONT color="green">1263</FONT>                }<a name="line.1263"></a>
<FONT color="green">1264</FONT>            }<a name="line.1264"></a>
<FONT color="green">1265</FONT>            return script;<a name="line.1265"></a>
<FONT color="green">1266</FONT>        }<a name="line.1266"></a>
<FONT color="green">1267</FONT>    <a name="line.1267"></a>
<FONT color="green">1268</FONT>        /**<a name="line.1268"></a>
<FONT color="green">1269</FONT>         * Creates a JexlInfo instance.<a name="line.1269"></a>
<FONT color="green">1270</FONT>         * @param fn url/file name<a name="line.1270"></a>
<FONT color="green">1271</FONT>         * @param l line number<a name="line.1271"></a>
<FONT color="green">1272</FONT>         * @param c column number<a name="line.1272"></a>
<FONT color="green">1273</FONT>         * @return a JexlInfo instance<a name="line.1273"></a>
<FONT color="green">1274</FONT>         */<a name="line.1274"></a>
<FONT color="green">1275</FONT>        protected JexlInfo createInfo(String fn, int l, int c) {<a name="line.1275"></a>
<FONT color="green">1276</FONT>            return new DebugInfo(fn, l, c);<a name="line.1276"></a>
<FONT color="green">1277</FONT>        }<a name="line.1277"></a>
<FONT color="green">1278</FONT>    <a name="line.1278"></a>
<FONT color="green">1279</FONT>        /**<a name="line.1279"></a>
<FONT color="green">1280</FONT>         * Creates and fills up debugging information.<a name="line.1280"></a>
<FONT color="green">1281</FONT>         * &lt;p&gt;This gathers the class, method and line number of the first calling method<a name="line.1281"></a>
<FONT color="green">1282</FONT>         * not owned by JexlEngine, UnifiedJEXL or {Script,Expression}Factory.&lt;/p&gt;<a name="line.1282"></a>
<FONT color="green">1283</FONT>         * @return an Info if debug is set, null otherwise<a name="line.1283"></a>
<FONT color="green">1284</FONT>         */<a name="line.1284"></a>
<FONT color="green">1285</FONT>        protected JexlInfo debugInfo() {<a name="line.1285"></a>
<FONT color="green">1286</FONT>            DebugInfo info = null;<a name="line.1286"></a>
<FONT color="green">1287</FONT>            if (debug) {<a name="line.1287"></a>
<FONT color="green">1288</FONT>                Throwable xinfo = new Throwable();<a name="line.1288"></a>
<FONT color="green">1289</FONT>                xinfo.fillInStackTrace();<a name="line.1289"></a>
<FONT color="green">1290</FONT>                StackTraceElement[] stack = xinfo.getStackTrace();<a name="line.1290"></a>
<FONT color="green">1291</FONT>                StackTraceElement se = null;<a name="line.1291"></a>
<FONT color="green">1292</FONT>                Class&lt;?&gt; clazz = getClass();<a name="line.1292"></a>
<FONT color="green">1293</FONT>                for (int s = 1; s &lt; stack.length; ++s, se = null) {<a name="line.1293"></a>
<FONT color="green">1294</FONT>                    se = stack[s];<a name="line.1294"></a>
<FONT color="green">1295</FONT>                    String className = se.getClassName();<a name="line.1295"></a>
<FONT color="green">1296</FONT>                    if (!className.equals(clazz.getName())) {<a name="line.1296"></a>
<FONT color="green">1297</FONT>                        // go deeper if called from JexlEngine or UnifiedJEXL<a name="line.1297"></a>
<FONT color="green">1298</FONT>                        if (className.equals(JexlEngine.class.getName())) {<a name="line.1298"></a>
<FONT color="green">1299</FONT>                            clazz = JexlEngine.class;<a name="line.1299"></a>
<FONT color="green">1300</FONT>                        } else if (className.equals(UnifiedJEXL.class.getName())) {<a name="line.1300"></a>
<FONT color="green">1301</FONT>                            clazz = UnifiedJEXL.class;<a name="line.1301"></a>
<FONT color="green">1302</FONT>                        } else {<a name="line.1302"></a>
<FONT color="green">1303</FONT>                            break;<a name="line.1303"></a>
<FONT color="green">1304</FONT>                        }<a name="line.1304"></a>
<FONT color="green">1305</FONT>                    }<a name="line.1305"></a>
<FONT color="green">1306</FONT>                }<a name="line.1306"></a>
<FONT color="green">1307</FONT>                if (se != null) {<a name="line.1307"></a>
<FONT color="green">1308</FONT>                    info = createInfo(se.getClassName() + "." + se.getMethodName(), se.getLineNumber(), 0).debugInfo();<a name="line.1308"></a>
<FONT color="green">1309</FONT>                }<a name="line.1309"></a>
<FONT color="green">1310</FONT>            }<a name="line.1310"></a>
<FONT color="green">1311</FONT>            return info;<a name="line.1311"></a>
<FONT color="green">1312</FONT>        }<a name="line.1312"></a>
<FONT color="green">1313</FONT>    <a name="line.1313"></a>
<FONT color="green">1314</FONT>        /**<a name="line.1314"></a>
<FONT color="green">1315</FONT>         * Trims the expression from front &amp; ending spaces.<a name="line.1315"></a>
<FONT color="green">1316</FONT>         * @param str expression to clean<a name="line.1316"></a>
<FONT color="green">1317</FONT>         * @return trimmed expression ending in a semi-colon<a name="line.1317"></a>
<FONT color="green">1318</FONT>         */<a name="line.1318"></a>
<FONT color="green">1319</FONT>        public static String cleanExpression(CharSequence str) {<a name="line.1319"></a>
<FONT color="green">1320</FONT>            if (str != null) {<a name="line.1320"></a>
<FONT color="green">1321</FONT>                int start = 0;<a name="line.1321"></a>
<FONT color="green">1322</FONT>                int end = str.length();<a name="line.1322"></a>
<FONT color="green">1323</FONT>                if (end &gt; 0) {<a name="line.1323"></a>
<FONT color="green">1324</FONT>                    // trim front spaces<a name="line.1324"></a>
<FONT color="green">1325</FONT>                    while (start &lt; end &amp;&amp; str.charAt(start) == ' ') {<a name="line.1325"></a>
<FONT color="green">1326</FONT>                        ++start;<a name="line.1326"></a>
<FONT color="green">1327</FONT>                    }<a name="line.1327"></a>
<FONT color="green">1328</FONT>                    // trim ending spaces<a name="line.1328"></a>
<FONT color="green">1329</FONT>                    while (end &gt; 0 &amp;&amp; str.charAt(end - 1) == ' ') {<a name="line.1329"></a>
<FONT color="green">1330</FONT>                        --end;<a name="line.1330"></a>
<FONT color="green">1331</FONT>                    }<a name="line.1331"></a>
<FONT color="green">1332</FONT>                    return str.subSequence(start, end).toString();<a name="line.1332"></a>
<FONT color="green">1333</FONT>                }<a name="line.1333"></a>
<FONT color="green">1334</FONT>                return "";<a name="line.1334"></a>
<FONT color="green">1335</FONT>            }<a name="line.1335"></a>
<FONT color="green">1336</FONT>            return null;<a name="line.1336"></a>
<FONT color="green">1337</FONT>        }<a name="line.1337"></a>
<FONT color="green">1338</FONT>    <a name="line.1338"></a>
<FONT color="green">1339</FONT>        /**<a name="line.1339"></a>
<FONT color="green">1340</FONT>         * Read from a reader into a local buffer and return a String with<a name="line.1340"></a>
<FONT color="green">1341</FONT>         * the contents of the reader.<a name="line.1341"></a>
<FONT color="green">1342</FONT>         * @param scriptReader to be read.<a name="line.1342"></a>
<FONT color="green">1343</FONT>         * @return the contents of the reader as a String.<a name="line.1343"></a>
<FONT color="green">1344</FONT>         * @throws IOException on any error reading the reader.<a name="line.1344"></a>
<FONT color="green">1345</FONT>         */<a name="line.1345"></a>
<FONT color="green">1346</FONT>        public static String readerToString(Reader scriptReader) throws IOException {<a name="line.1346"></a>
<FONT color="green">1347</FONT>            StringBuilder buffer = new StringBuilder();<a name="line.1347"></a>
<FONT color="green">1348</FONT>            BufferedReader reader;<a name="line.1348"></a>
<FONT color="green">1349</FONT>            if (scriptReader instanceof BufferedReader) {<a name="line.1349"></a>
<FONT color="green">1350</FONT>                reader = (BufferedReader) scriptReader;<a name="line.1350"></a>
<FONT color="green">1351</FONT>            } else {<a name="line.1351"></a>
<FONT color="green">1352</FONT>                reader = new BufferedReader(scriptReader);<a name="line.1352"></a>
<FONT color="green">1353</FONT>            }<a name="line.1353"></a>
<FONT color="green">1354</FONT>            try {<a name="line.1354"></a>
<FONT color="green">1355</FONT>                String line;<a name="line.1355"></a>
<FONT color="green">1356</FONT>                while ((line = reader.readLine()) != null) {<a name="line.1356"></a>
<FONT color="green">1357</FONT>                    buffer.append(line).append('\n');<a name="line.1357"></a>
<FONT color="green">1358</FONT>                }<a name="line.1358"></a>
<FONT color="green">1359</FONT>                return buffer.toString();<a name="line.1359"></a>
<FONT color="green">1360</FONT>            } finally {<a name="line.1360"></a>
<FONT color="green">1361</FONT>                try {<a name="line.1361"></a>
<FONT color="green">1362</FONT>                    reader.close();<a name="line.1362"></a>
<FONT color="green">1363</FONT>                } catch (IOException xio) {<a name="line.1363"></a>
<FONT color="green">1364</FONT>                    // ignore<a name="line.1364"></a>
<FONT color="green">1365</FONT>                }<a name="line.1365"></a>
<FONT color="green">1366</FONT>            }<a name="line.1366"></a>
<FONT color="green">1367</FONT>    <a name="line.1367"></a>
<FONT color="green">1368</FONT>        }<a name="line.1368"></a>
<FONT color="green">1369</FONT>    }<a name="line.1369"></a>




























































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