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; 025import org.objectweb.asm.commons.GeneratorAdapter; 026 027public final class DecisionObjectVisitor { 028 029 public static final int EQ=Opcodes.IF_ACMPEQ; 030 public static final int NEQ=Opcodes.IF_ACMPNE; 031 032 private int operation; 033 public void visitBegin() { 034 035 } 036 public void visitMiddle(int operation) { 037 this.operation=operation; 038 } 039 public void visitEQ() { 040 this.operation=EQ; 041 } 042 public void visitNEQ() { 043 this.operation=NEQ; 044 } 045 public void visitEnd(BytecodeContext bc) { 046 GeneratorAdapter adapter = bc.getAdapter(); 047 048 Label l1 = new Label(); 049 adapter.visitJumpInsn(operation, l1); 050 //mv.visitJumpInsn(IF_ICMPGT, l1); 051 adapter.visitInsn(Opcodes.ICONST_0); 052 Label l2 = new Label(); 053 adapter.visitJumpInsn(Opcodes.GOTO, l2); 054 adapter.visitLabel(l1); 055 adapter.visitInsn(Opcodes.ICONST_1); 056 adapter.visitLabel(l2); 057 058 } 059}