code: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements. See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership. The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the  "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  /*
   * $Id$
   */
  
  package org.apache.xalan.xsltc.compiler;
  
  import org.apache.bcel.generic.ConstantPoolGen;
  import org.apache.bcel.generic.GETSTATIC;
  import org.apache.bcel.generic.INVOKESPECIAL;
  import org.apache.bcel.generic.INVOKEVIRTUAL;
  import org.apache.bcel.generic.InstructionList;
  import org.apache.bcel.generic.NEW;
  import org.apache.bcel.generic.PUSH;
  import org.apache.xalan.xsltc.compiler.util.ClassGenerator;
  import org.apache.xalan.xsltc.compiler.util.ErrorMsg;
  import org.apache.xalan.xsltc.compiler.util.MethodGenerator;
  import org.apache.xalan.xsltc.compiler.util.Type;
  import org.apache.xalan.xsltc.compiler.util.TypeCheckError;
  import org.apache.xml.utils.XML11Char;
  
  /**
   * @author Jacek Ambroziak
   * @author Santiago Pericas-Geertsen
   * @author Morten Jorgensen
   */
  final class DecimalFormatting extends TopLevelElement {
  
      private static final String DFS_CLASS = "java.text.DecimalFormatSymbols";
      private static final String DFS_SIG   = "Ljava/text/DecimalFormatSymbols;";
  
      private QName _name = null;
  
      /**
       * No type check needed for the <xsl:decimal-formatting/> element
       */
      public Type typeCheck(SymbolTable stable) throws TypeCheckError {
  	return Type.Void;
      }
  
      /**
       * Parse the name of the <xsl:decimal-formatting/> element
       */
      public void parseContents(Parser parser) {
  	// Get the name of these decimal formatting symbols
          final String name = getAttribute("name");
          if (name.length() > 0) {
              if (!XML11Char.isXML11ValidQName(name)){
                  ErrorMsg err = new ErrorMsg(ErrorMsg.INVALID_QNAME_ERR, name, this);
                  parser.reportError(Constants.ERROR, err);           
              }
          }
          _name = parser.getQNameIgnoreDefaultNs(name);
          if (_name == null) {
              _name = parser.getQNameIgnoreDefaultNs(EMPTYSTRING);
          }         
  
  	// Check if a set of symbols has already been registered under this name
  	SymbolTable stable = parser.getSymbolTable();
  	if (stable.getDecimalFormatting(_name) != null) {
  	    reportWarning(this, parser, ErrorMsg.SYMBOLS_REDEF_ERR,
  		_name.toString());
  	}
  	else {
  	    stable.addDecimalFormatting(_name, this);
  	}
      }
  
      /**
       * This method is called when the constructor is compiled in
       * Stylesheet.compileConstructor() and not as the syntax tree is traversed.
       */
      public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
  
  	ConstantPoolGen cpg = classGen.getConstantPool();
  	InstructionList il = methodGen.getInstructionList();
  	
  	// DecimalFormatSymbols.<init>(Locale);
          // xsl:decimal-format - except for the NaN and infinity attributes.
  	final int init = cpg.addMethodref(DFS_CLASS, "<init>",
                                            "("+LOCALE_SIG+")V");
  
  	// Push the format name on the stack for call to addDecimalFormat()
  	il.append(classGen.loadTranslet());
  	il.append(new PUSH(cpg, _name.toString()));
  
  	// Manufacture a DecimalFormatSymbols on the stack
  	// for call to addDecimalFormat()
          // Use the US Locale as the default, as most of its settings
          // are equivalent to the default settings required of
  	il.append(new NEW(cpg.addClass(DFS_CLASS)));
  	il.append(DUP);
          il.append(new GETSTATIC(cpg.addFieldref(LOCALE_CLASS, "US",
                                                  LOCALE_SIG)));
  	il.append(new INVOKESPECIAL(init));
  
  	String tmp = getAttribute("NaN");
  	if ((tmp == null) || (tmp.equals(EMPTYSTRING))) {
  	    int nan = cpg.addMethodref(DFS_CLASS,
  				       "setNaN", "(Ljava/lang/String;)V");
  	    il.append(DUP);
  	    il.append(new PUSH(cpg, "NaN"));
  	    il.append(new INVOKEVIRTUAL(nan));
  	}
  
  	tmp = getAttribute("infinity");
  	if ((tmp == null) || (tmp.equals(EMPTYSTRING))) {
  	    int inf = cpg.addMethodref(DFS_CLASS,
  				       "setInfinity",
  				       "(Ljava/lang/String;)V");
  	    il.append(DUP);
  	    il.append(new PUSH(cpg, "Infinity"));
  	    il.append(new INVOKEVIRTUAL(inf));
  	}
  	    
  	final int nAttributes = _attributes.getLength();
  	for (int i = 0; i < nAttributes; i++) {
  	    final String name = _attributes.getQName(i);
  	    final String value = _attributes.getValue(i);
  
  	    boolean valid = true;
  	    int method = 0;
  
  	    if (name.equals("decimal-separator")) {
  		// DecimalFormatSymbols.setDecimalSeparator();
  		method = cpg.addMethodref(DFS_CLASS,
  					  "setDecimalSeparator", "(C)V");
  	    }
  	    else if (name.equals("grouping-separator")) {
  		method =  cpg.addMethodref(DFS_CLASS,
  					   "setGroupingSeparator", "(C)V");
  	    }
  	    else if (name.equals("minus-sign")) {
  		method = cpg.addMethodref(DFS_CLASS,
  					  "setMinusSign", "(C)V");
  	    }
  	    else if (name.equals("percent")) {
  		method = cpg.addMethodref(DFS_CLASS,
  					  "setPercent", "(C)V");
  	    }
  	    else if (name.equals("per-mille")) {
  		method = cpg.addMethodref(DFS_CLASS,
  					  "setPerMill", "(C)V");
  	    }
  	    else if (name.equals("zero-digit")) {
  		method = cpg.addMethodref(DFS_CLASS,
  					  "setZeroDigit", "(C)V");
  	    }
  	    else if (name.equals("digit")) {
  		method = cpg.addMethodref(DFS_CLASS,
  					  "setDigit", "(C)V");
  	    }
  	    else if (name.equals("pattern-separator")) {
  		method = cpg.addMethodref(DFS_CLASS,
  					  "setPatternSeparator", "(C)V");
  	    }
  	    else if (name.equals("NaN")) {
  		method = cpg.addMethodref(DFS_CLASS,
  					  "setNaN", "(Ljava/lang/String;)V");
  	        il.append(DUP);
  		il.append(new PUSH(cpg, value));
  		il.append(new INVOKEVIRTUAL(method));
  		valid = false;
  	    }
  	    else if (name.equals("infinity")) {
  		method = cpg.addMethodref(DFS_CLASS,
  					  "setInfinity",
  					  "(Ljava/lang/String;)V");
  	        il.append(DUP);
  		il.append(new PUSH(cpg, value));
  		il.append(new INVOKEVIRTUAL(method));
  		valid = false;
  	    }
  	    else {
  		valid = false;
  	    }
  
  	    if (valid) {
  		il.append(DUP);
  		il.append(new PUSH(cpg, value.charAt(0)));
  		il.append(new INVOKEVIRTUAL(method));
  	    }
  
  	}
  
  	final int put = cpg.addMethodref(TRANSLET_CLASS,
  					 "addDecimalFormat",
  					 "("+STRING_SIG+DFS_SIG+")V");
  	il.append(new INVOKEVIRTUAL(put));
      }
  
      /**
       * Creates the default, nameless, DecimalFormat object in
       * AbstractTranslet's format_symbols hashtable.
       * This should be called for every stylesheet, and the entry
       * may be overridden by later nameless xsl:decimal-format instructions.
       */
      public static void translateDefaultDFS(ClassGenerator classGen,
  					   MethodGenerator methodGen) {
  
  	ConstantPoolGen cpg = classGen.getConstantPool();
  	InstructionList il = methodGen.getInstructionList();
  	final int init = cpg.addMethodref(DFS_CLASS, "<init>",
                                            "("+LOCALE_SIG+")V");
  
  	// Push the format name, which is empty, on the stack
  	// for call to addDecimalFormat()
  	il.append(classGen.loadTranslet());
  	il.append(new PUSH(cpg, EMPTYSTRING));
  
  	// Manufacture a DecimalFormatSymbols on the stack for
  	// call to addDecimalFormat().  Use the US Locale as the
          // default, as most of its settings are equivalent to
          // the default settings required of xsl:decimal-format -
          // except for the NaN and infinity attributes.
  	il.append(new NEW(cpg.addClass(DFS_CLASS)));
  	il.append(DUP);
          il.append(new GETSTATIC(cpg.addFieldref(LOCALE_CLASS, "US",
                                                  LOCALE_SIG)));
  	il.append(new INVOKESPECIAL(init));
  
  	int nan = cpg.addMethodref(DFS_CLASS,
  				   "setNaN", "(Ljava/lang/String;)V");
  	il.append(DUP);
  	il.append(new PUSH(cpg, "NaN"));
  	il.append(new INVOKEVIRTUAL(nan));
  
  	int inf = cpg.addMethodref(DFS_CLASS,
  				   "setInfinity",
  				   "(Ljava/lang/String;)V");
  	il.append(DUP);
  	il.append(new PUSH(cpg, "Infinity"));
  	il.append(new INVOKEVIRTUAL(inf));
  
  	final int put = cpg.addMethodref(TRANSLET_CLASS,
  					 "addDecimalFormat",
  					 "("+STRING_SIG+DFS_SIG+")V");
  	il.append(new INVOKEVIRTUAL(put));
      }
  }
  