001/**
002 *
003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
004 *
005 * This library is free software; you can redistribute it and/or
006 * modify it under the terms of the GNU Lesser General Public
007 * License as published by the Free Software Foundation; either 
008 * version 2.1 of the License, or (at your option) any later version.
009 * 
010 * This library is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013 * Lesser General Public License for more details.
014 * 
015 * You should have received a copy of the GNU Lesser General Public 
016 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
017 * 
018 **/
019package lucee.transformer.bytecode.visitor;
020
021import lucee.transformer.bytecode.BytecodeContext;
022
023import org.objectweb.asm.Label;
024import org.objectweb.asm.Opcodes;
025
026public final class ConditionVisitor {
027
028        private Label end;
029        private Label endIf;
030
031        public void visitBefore() {
032                end = new Label();
033        }
034        
035        public void visitWhenBeforeExpr() {}
036
037        public void visitWhenAfterExprBeforeBody(BytecodeContext bc){
038                endIf = new Label();
039            bc.getAdapter().ifZCmp(Opcodes.IFEQ, endIf);
040        }
041        
042        public void visitWhenAfterBody(BytecodeContext bc)      {
043        bc.getAdapter().visitJumpInsn(Opcodes.GOTO, end);
044        bc.getAdapter().visitLabel(endIf);
045        }
046
047        public void visitOtherviseBeforeBody(){}
048        
049        public void visitOtherviseAfterBody()   {}
050
051        public void visitAfter(BytecodeContext bc) {
052                bc.getAdapter().visitLabel(end);
053        }
054        
055}