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 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * https://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019package org.apache.bcel.generic; 020 021/** 022 * LCONST - Push 0 or 1, other values cause an exception 023 * 024 * <PRE> 025 * Stack: ... -> ..., 026 * </PRE> 027 */ 028public class LCONST extends Instruction implements ConstantPushInstruction { 029 030 private final long value; 031 032 /** 033 * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise. 034 */ 035 LCONST() { 036 this(0); 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 * Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call 053 * methods according to the class hierarchy in descending order, i.e., the most specific visitXXX() call comes last. 054 * 055 * @param v Visitor object 056 */ 057 @Override 058 public void accept(final Visitor v) { 059 v.visitPushInstruction(this); 060 v.visitStackProducer(this); 061 v.visitTypedInstruction(this); 062 v.visitConstantPushInstruction(this); 063 v.visitLCONST(this); 064 } 065 066 /** 067 * @return Type.LONG 068 */ 069 @Override 070 public Type getType(final ConstantPoolGen cp) { 071 return Type.LONG; 072 } 073 074 @Override 075 public Number getValue() { 076 return Long.valueOf(value); 077 } 078}