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 * ICONST - Push value between -1, ..., 5, other values cause an exception 022 * 023 * <PRE>Stack: ... -> ..., </PRE> 024 * 025 */ 026public class ICONST extends Instruction implements ConstantPushInstruction { 027 028 private int value; 029 030 031 /** 032 * Empty constructor needed for Instruction.readInstruction. 033 * Not to be used otherwise. 034 */ 035 ICONST() { 036 } 037 038 039 public ICONST(final int i) { 040 super(org.apache.bcel.Const.ICONST_0, (short) 1); 041 if ((i >= -1) && (i <= 5)) { 042 super.setOpcode((short) (org.apache.bcel.Const.ICONST_0 + i)); // Even works for i == -1 043 } else { 044 throw new ClassGenException("ICONST can be used only for value between -1 and 5: " + i); 045 } 046 value = i; 047 } 048 049 050 @Override 051 public Number getValue() { 052 return Integer.valueOf(value); 053 } 054 055 056 /** @return Type.INT 057 */ 058 @Override 059 public Type getType( final ConstantPoolGen cp ) { 060 return Type.INT; 061 } 062 063 064 /** 065 * Call corresponding visitor method(s). The order is: 066 * Call visitor methods of implemented interfaces first, then 067 * call methods according to the class hierarchy in descending order, 068 * i.e., the most specific visitXXX() call comes last. 069 * 070 * @param v Visitor object 071 */ 072 @Override 073 public void accept( final Visitor v ) { 074 v.visitPushInstruction(this); 075 v.visitStackProducer(this); 076 v.visitTypedInstruction(this); 077 v.visitConstantPushInstruction(this); 078 v.visitICONST(this); 079 } 080}