| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * 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. |
| */ |
| |
| package com.sun.org.apache.xalan.internal.xsltc.compiler.util; |
| |
| import com.sun.org.apache.bcel.internal.generic.ACONST_NULL; |
| import com.sun.org.apache.bcel.internal.generic.ALOAD; |
| import com.sun.org.apache.bcel.internal.generic.ASTORE; |
| import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen; |
| import com.sun.org.apache.bcel.internal.generic.ILOAD; |
| import com.sun.org.apache.bcel.internal.generic.ISTORE; |
| import com.sun.org.apache.bcel.internal.generic.Instruction; |
| import com.sun.org.apache.bcel.internal.generic.InstructionList; |
| import com.sun.org.apache.bcel.internal.generic.LocalVariableGen; |
| import com.sun.org.apache.bcel.internal.generic.Type; |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.Constants; |
| |
| /** |
| * @author Jacek Ambroziak |
| * @author Santiago Pericas-Geertsen |
| */ |
| public final class CompareGenerator extends MethodGenerator { |
| |
| private static int DOM_INDEX = 1; |
| private static int CURRENT_INDEX = 2; |
| private static int LEVEL_INDEX = 3; |
| private static int TRANSLET_INDEX = 4; |
| private static int LAST_INDEX = 5; |
| private int ITERATOR_INDEX = 6; |
| |
| private final Instruction _iloadCurrent; |
| private final Instruction _istoreCurrent; |
| private final Instruction _aloadDom; |
| private final Instruction _iloadLast; |
| private final Instruction _aloadIterator; |
| private final Instruction _astoreIterator; |
| |
| public CompareGenerator(int access_flags, Type return_type, |
| Type[] arg_types, String[] arg_names, |
| String method_name, String class_name, |
| InstructionList il, ConstantPoolGen cp) { |
| super(access_flags, return_type, arg_types, arg_names, method_name, |
| class_name, il, cp); |
| |
| _iloadCurrent = new ILOAD(CURRENT_INDEX); |
| _istoreCurrent = new ISTORE(CURRENT_INDEX); |
| _aloadDom = new ALOAD(DOM_INDEX); |
| _iloadLast = new ILOAD(LAST_INDEX); |
| |
| LocalVariableGen iterator = |
| addLocalVariable("iterator", |
| Util.getJCRefType(Constants.NODE_ITERATOR_SIG), |
| null, null); |
| ITERATOR_INDEX = iterator.getIndex(); |
| _aloadIterator = new ALOAD(ITERATOR_INDEX); |
| _astoreIterator = new ASTORE(ITERATOR_INDEX); |
| il.append(new ACONST_NULL()); |
| il.append(storeIterator()); |
| } |
| |
| public Instruction loadLastNode() { |
| return _iloadLast; |
| } |
| |
| public Instruction loadCurrentNode() { |
| return _iloadCurrent; |
| } |
| |
| public Instruction storeCurrentNode() { |
| return _istoreCurrent; |
| } |
| |
| public Instruction loadDOM() { |
| return _aloadDom; |
| } |
| |
| public int getHandlerIndex() { |
| return INVALID_INDEX; // not available |
| } |
| |
| public int getIteratorIndex() { |
| return INVALID_INDEX; |
| } |
| |
| public Instruction storeIterator() { |
| return _astoreIterator; |
| } |
| |
| public Instruction loadIterator() { |
| return _aloadIterator; |
| } |
| |
| //??? may not be used anymore |
| public int getLocalIndex(String name) { |
| if (name.equals("current")) { |
| return CURRENT_INDEX; |
| } |
| return super.getLocalIndex(name); |
| } |
| } |