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: NotCall.java 468650 2006-10-28 07:03:30Z minchau $
020     */
021    
022    package org.apache.xalan.xsltc.compiler;
023    
024    import java.util.Vector;
025    
026    import org.apache.bcel.generic.BranchHandle;
027    import org.apache.bcel.generic.GOTO;
028    import org.apache.bcel.generic.InstructionList;
029    import org.apache.xalan.xsltc.compiler.util.ClassGenerator;
030    import org.apache.xalan.xsltc.compiler.util.MethodGenerator;
031    
032    /**
033     * @author Jacek Ambroziak
034     * @author Santiago Pericas-Geertsen
035     */
036    final class NotCall extends FunctionCall {
037        public NotCall(QName fname, Vector arguments) {
038            super(fname, arguments);
039        }
040    
041        public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
042            final InstructionList il = methodGen.getInstructionList();
043            argument().translate(classGen, methodGen);
044            il.append(ICONST_1);
045            il.append(IXOR);
046        }
047    
048        public void translateDesynthesized(ClassGenerator classGen,
049                                           MethodGenerator methodGen) {
050            final InstructionList il = methodGen.getInstructionList();
051            final Expression exp = argument();
052            exp.translateDesynthesized(classGen, methodGen);
053            final BranchHandle gotoh = il.append(new GOTO(null));
054            _trueList = exp._falseList;     // swap flow lists
055            _falseList = exp._trueList;
056            _falseList.add(gotoh);
057        }
058    }