001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the "License"); 007 * you may not use this file except in compliance with the License. 008 * You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 /* 019 * $Id: FilterGenerator.java 468649 2006-10-28 07:00:55Z minchau $ 020 */ 021 022 package org.apache.xalan.xsltc.compiler.util; 023 024 import org.apache.bcel.generic.ALOAD; 025 import org.apache.bcel.generic.Instruction; 026 import org.apache.xalan.xsltc.compiler.Stylesheet; 027 028 /** 029 * This class implements auxliary classes needed to compile 030 * filters (predicates). These classes defined a single method 031 * of type <tt>TestGenerator</tt>. 032 * @author Jacek Ambroziak 033 * @author Santiago Pericas-Geertsen 034 */ 035 public final class FilterGenerator extends ClassGenerator { 036 private static int TRANSLET_INDEX = 5; // translet 037 private final Instruction _aloadTranslet; 038 039 public FilterGenerator(String className, String superClassName, 040 String fileName, 041 int accessFlags, String[] interfaces, 042 Stylesheet stylesheet) { 043 super(className, superClassName, fileName, 044 accessFlags, interfaces, stylesheet); 045 046 _aloadTranslet = new ALOAD(TRANSLET_INDEX); 047 } 048 049 /** 050 * The index of the translet pointer within the execution of 051 * the test method. 052 */ 053 public final Instruction loadTranslet() { 054 return _aloadTranslet; 055 } 056 057 /** 058 * Returns <tt>true</tt> since this class is external to the 059 * translet. 060 */ 061 public boolean isExternal() { 062 return true; 063 } 064 }