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.util;
  
  import java.util.StringTokenizer;
  
  import org.apache.bcel.generic.Type;
  import org.apache.xalan.xsltc.compiler.Constants;
  import org.apache.xml.utils.XML11Char;
  
  /**
   * @author Jacek Ambroziak
   * @author Santiago Pericas-Geertsen
   */
  public final class Util {
      private static char filesep;
  
      static {
  	String temp = System.getProperty("file.separator", "/");
  	filesep = temp.charAt(0);
      }
  
      public static String noExtName(String name) {
  	final int index = name.lastIndexOf('.');
  	return name.substring(0, index >= 0 ? index : name.length());
      }
  
      /**
       * Search for both slashes in order to support URLs and 
       * files.
       */
      public static String baseName(String name) {
  	int index = name.lastIndexOf('\\');
  	if (index < 0) {
  	    index = name.lastIndexOf('/');
  	}
  	
  	if (index >= 0)
  	    return name.substring(index + 1);
  	else {
  	    int lastColonIndex = name.lastIndexOf(':');
  	    if (lastColonIndex > 0)
  	    	return name.substring(lastColonIndex + 1);
  	    else
  	    	return name;
  	}
      }
  
      /**
       * Search for both slashes in order to support URLs and 
       * files.
       */
      public static String pathName(String name) {
  	int index = name.lastIndexOf('/');
  	if (index < 0) {
  	    index = name.lastIndexOf('\\');
  	}
  	return name.substring(0, index + 1);
      }
  
      /**
       * Replace all illegal Java chars by '_'.
       */
      public static String toJavaName(String name) {
  	if (name.length() > 0) {
  	    final StringBuffer result = new StringBuffer();
  
  	    char ch = name.charAt(0);
  	    result.append(Character.isJavaIdentifierStart(ch) ? ch : '_');
  
  	    final int n = name.length();
  	    for (int i = 1; i < n; i++) {
  		ch = name.charAt(i);
  		result.append(Character.isJavaIdentifierPart(ch)  ? ch : '_');
  	    }
  	    return result.toString();
  	}
  	return name;
      }
  
      public static Type getJCRefType(String signature) {
  	return Type.getType(signature);
      }
  
      public static String internalName(String cname) {
  	return cname.replace('.', filesep);
      }
  
      public static void println(String s) {
  	System.out.println(s);
      }
  
      public static void println(char ch) {
  	System.out.println(ch);
      }
  
      public static void TRACE1() {
  	System.out.println("TRACE1");
      }
  
      public static void TRACE2() {
  	System.out.println("TRACE2");
      }
  
      public static void TRACE3() {
  	System.out.println("TRACE3");
      }
  
      /**
       * Replace a certain character in a string with a new substring.
       */
      public static String replace(String base, char ch, String str) {
  	return (base.indexOf(ch) < 0) ? base : 
  	    replace(base, String.valueOf(ch), new String[] { str });
      }
  
      public static String replace(String base, String delim, String[] str) {
  	final int len = base.length();
  	final StringBuffer result = new StringBuffer();
  
  	for (int i = 0; i < len; i++) {
  	    final char ch = base.charAt(i);
  	    final int k = delim.indexOf(ch);
  
  	    if (k >= 0) {
  		result.append(str[k]);
  	    }
  	    else {
  		result.append(ch);
  	    }
  	}
  	return result.toString();
      }
  
      /**
       * Replace occurances of '.', '-', '/' and ':'
       */
      public static String escape(String input) {
  	return replace(input, ".-/:", 
  	    new String[] { "$dot$", "$dash$", "$slash$", "$colon$" });
      }
  
      public static String getLocalName(String qname) {
  	final int index = qname.lastIndexOf(':');
  	return (index > 0) ? qname.substring(index + 1) : qname;
      }
  
      public static String getPrefix(String qname) {
  	final int index = qname.lastIndexOf(':');
  	return (index > 0) ? qname.substring(0, index) : 
  	    Constants.EMPTYSTRING;
      } 
            
      /**
       * Checks if the string is a literal (i.e. not an AVT) or not.
       */
      public static boolean isLiteral(String str) {
          final int length = str.length();
          for (int i = 0; i < length - 1; i++) {
              if (str.charAt(i) == '{' && str.charAt(i + 1) != '{') {
          	return false;
              }
          }
          return true;
      }
      
      /**
       * Checks if the string is valid list of qnames
       */
      public static boolean isValidQNames(String str) {
          if ((str != null) && (!str.equals(Constants.EMPTYSTRING))) {
              final StringTokenizer tokens = new StringTokenizer(str);
              while (tokens.hasMoreTokens()) {
                  if (!XML11Char.isXML11ValidQName(tokens.nextToken())) {
                      return false;
                  }
              }
          }
          return true;
      }    
        	   
  }
  
  