001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 * 017 */ 018package org.apache.bcel.generic; 019 020/** 021 * LCONST - Push 0 or 1, other values cause an exception 022 * 023 * <PRE>Stack: ... -> ..., </PRE> 024 * 025 */ 026public class LCONST extends Instruction implements ConstantPushInstruction { 027 028 private long value; 029 030 031 /** 032 * Empty constructor needed for Instruction.readInstruction. 033 * Not to be used otherwise. 034 */ 035 LCONST() { 036 } 037 038 039 public LCONST(final long l) { 040 super(org.apache.bcel.Const.LCONST_0, (short) 1); 041 if (l == 0) { 042 super.setOpcode(org.apache.bcel.Const.LCONST_0); 043 } else if (l == 1) { 044 super.setOpcode(org.apache.bcel.Const.LCONST_1); 045 } else { 046 throw new ClassGenException("LCONST can be used only for 0 and 1: " + l); 047 } 048 value = l; 049 } 050 051 052 @Override 053 public Number getValue() { 054 return Long.valueOf(value); 055 } 056 057 058 /** @return Type.LONG 059 */ 060 @Override 061 public Type getType( final ConstantPoolGen cp ) { 062 return Type.LONG; 063 } 064 065 066 /** 067 * Call corresponding visitor method(s). The order is: 068 * Call visitor methods of implemented interfaces first, then 069 * call methods according to the class hierarchy in descending order, 070 * i.e., the most specific visitXXX() call comes last. 071 * 072 * @param v Visitor object 073 */ 074 @Override 075 public void accept( final Visitor v ) { 076 v.visitPushInstruction(this); 077 v.visitStackProducer(this); 078 v.visitTypedInstruction(this); 079 v.visitConstantPushInstruction(this); 080 v.visitLCONST(this); 081 } 082}