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 * @version $Id: ICONST.java 1812166 2017-10-13 23:48:11Z ggregory $ 026 */ 027public class ICONST extends Instruction implements ConstantPushInstruction { 028 029 private int value; 030 031 032 /** 033 * Empty constructor needed for Instruction.readInstruction. 034 * Not to be used otherwise. 035 */ 036 ICONST() { 037 } 038 039 040 public ICONST(final int i) { 041 super(org.apache.bcel.Const.ICONST_0, (short) 1); 042 if ((i >= -1) && (i <= 5)) { 043 super.setOpcode((short) (org.apache.bcel.Const.ICONST_0 + i)); // Even works for i == -1 044 } else { 045 throw new ClassGenException("ICONST can be used only for value between -1 and 5: " + i); 046 } 047 value = i; 048 } 049 050 051 @Override 052 public Number getValue() { 053 return Integer.valueOf(value); 054 } 055 056 057 /** @return Type.INT 058 */ 059 @Override 060 public Type getType( final ConstantPoolGen cp ) { 061 return Type.INT; 062 } 063 064 065 /** 066 * Call corresponding visitor method(s). The order is: 067 * Call visitor methods of implemented interfaces first, then 068 * call methods according to the class hierarchy in descending order, 069 * i.e., the most specific visitXXX() call comes last. 070 * 071 * @param v Visitor object 072 */ 073 @Override 074 public void accept( final Visitor v ) { 075 v.visitPushInstruction(this); 076 v.visitStackProducer(this); 077 v.visitTypedInstruction(this); 078 v.visitConstantPushInstruction(this); 079 v.visitICONST(this); 080 } 081}