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 org.apache.bcel.classfile.Method;
  import org.apache.bcel.generic.ALOAD;
  import org.apache.bcel.generic.ClassGen;
  import org.apache.bcel.generic.Instruction;
  import org.apache.xalan.xsltc.compiler.Constants;
  import org.apache.xalan.xsltc.compiler.Parser;
  import org.apache.xalan.xsltc.compiler.Stylesheet;
  
  /**
   * The class that implements any class that inherits from 
   * <tt>AbstractTranslet</tt>, i.e. any translet. Methods in this 
   * class may be of the following kinds: 
   *
   * 1. Main method: applyTemplates, implemented by intances of 
   * <tt>MethodGenerator</tt>.
   *
   * 2. Named methods: for named templates, implemented by instances 
   * of <tt>NamedMethodGenerator</tt>.
   *
   * 3. Rt methods: for result tree fragments, implemented by 
   * instances of <tt>RtMethodGenerator</tt>.
   * @author Jacek Ambroziak
   * @author Santiago Pericas-Geertsen
   */
  public class ClassGenerator extends ClassGen {
      protected final static int TRANSLET_INDEX = 0;
  
      private Stylesheet _stylesheet;
      private final Parser _parser;		// --> can be moved to XSLT
      // a  single instance cached here
      private final Instruction _aloadTranslet;
      private final String _domClass;
      private final String _domClassSig;
      private final String _applyTemplatesSig;
  	private final String _applyTemplatesSigForImport;
      
      public ClassGenerator(String class_name, String super_class_name,
  			  String file_name,
  			  int access_flags, String[] interfaces,
  			  Stylesheet stylesheet) {
  	super(class_name, super_class_name, file_name,
  	      access_flags, interfaces);
  	_stylesheet = stylesheet;
  	_parser = stylesheet.getParser();
  	_aloadTranslet = new ALOAD(TRANSLET_INDEX);
  	
  	if (stylesheet.isMultiDocument()) {
  	    _domClass = "org.apache.xalan.xsltc.dom.MultiDOM";
  	    _domClassSig = "Lorg/apache/xalan/xsltc/dom/MultiDOM;";
  	}
  	else {
  	    _domClass = "org.apache.xalan.xsltc.dom.DOMAdapter";
  	    _domClassSig = "Lorg/apache/xalan/xsltc/dom/DOMAdapter;";
  	}
  	_applyTemplatesSig = "(" 
  	    + Constants.DOM_INTF_SIG
  	    + Constants.NODE_ITERATOR_SIG
  	    + Constants.TRANSLET_OUTPUT_SIG
  	    + ")V";
  
      _applyTemplatesSigForImport = "(" 
          + Constants.DOM_INTF_SIG
          + Constants.NODE_ITERATOR_SIG
          + Constants.TRANSLET_OUTPUT_SIG
          + Constants.NODE_FIELD_SIG
          + ")V";  
      }
  
      public final Parser getParser() {
  	return _parser;
      }
  
      public final Stylesheet getStylesheet() {
  	return _stylesheet;
      }
  
      /**
       * Pretend this is the stylesheet class. Useful when compiling 
       * references to global variables inside a predicate.
       */
      public final String getClassName() {
  	return _stylesheet.getClassName();
      }
  
      public Instruction loadTranslet() {
  	return _aloadTranslet;
      }
  
      public final String getDOMClass() {
  	return _domClass;
      }
  
      public final String getDOMClassSig() {
  	return _domClassSig;
      }
  
      public final String getApplyTemplatesSig() {
  	return _applyTemplatesSig;
      }
      
      public final String getApplyTemplatesSigForImport() {
      return _applyTemplatesSigForImport;
      }
  
      /**
       * Returns <tt>true</tt> or <tt>false</tt> depending on whether
       * this class inherits from <tt>AbstractTranslet</tt> or not.
       */
      public boolean isExternal() {
  	return false;
      }
  
      public void addMethod(MethodGenerator methodGen) {
          Method[] methodsToAdd = methodGen.getGeneratedMethods(this);
          for (int i = 0; i < methodsToAdd.length; i++) {
              addMethod(methodsToAdd[i]);
          }
      }
  }
  