1 /*
   2  * reserved comment block
   3  * DO NOT REMOVE OR ALTER!
   4  */
   5 /*
   6  * Copyright 2001-2004 The Apache Software Foundation.
   7  *
   8  * Licensed under the Apache License, Version 2.0 (the "License");
   9  * you may not use this file except in compliance with the License.
  10  * You may obtain a copy of the License at
  11  *
  12  *     http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  * Unless required by applicable law or agreed to in writing, software
  15  * distributed under the License is distributed on an "AS IS" BASIS,
  16  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17  * See the License for the specific language governing permissions and
  18  * limitations under the License.
  19  */
  20 /*
  21  * $Id: FilterGenerator.java,v 1.2.4.1 2005/09/05 11:13:52 pvedula Exp $
  22  */
  23 
  24 package com.sun.org.apache.xalan.internal.xsltc.compiler.util;
  25 
  26 import com.sun.org.apache.bcel.internal.generic.ALOAD;
  27 import com.sun.org.apache.bcel.internal.generic.Instruction;
  28 import com.sun.org.apache.xalan.internal.xsltc.compiler.Stylesheet;
  29 
  30 /**
  31  * This class implements auxliary classes needed to compile
  32  * filters (predicates). These classes defined a single method
  33  * of type <tt>TestGenerator</tt>.
  34  * @author Jacek Ambroziak
  35  * @author Santiago Pericas-Geertsen
  36  */
  37 public final class FilterGenerator extends ClassGenerator {
  38     private static int TRANSLET_INDEX = 5;   // translet
  39     private final Instruction _aloadTranslet;
  40 
  41     public FilterGenerator(String className, String superClassName,
  42                            String fileName,
  43                            int accessFlags, String[] interfaces,
  44                            Stylesheet stylesheet) {
  45         super(className, superClassName, fileName,
  46               accessFlags, interfaces, stylesheet);
  47 
  48         _aloadTranslet = new ALOAD(TRANSLET_INDEX);
  49     }
  50 
  51     /**
  52      * The index of the translet pointer within the execution of
  53      * the test method.
  54      */
  55     public final Instruction loadTranslet() {
  56         return _aloadTranslet;
  57     }
  58 
  59     /**
  60      * Returns <tt>true</tt> since this class is external to the
  61      * translet.
  62      */
  63     public boolean isExternal() {
  64         return true;
  65     }
  66 }