1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 */ 4 /* 5 * Licensed to the Apache Software Foundation (ASF) under one or more 6 * contributor license agreements. See the NOTICE file distributed with 7 * this work for additional information regarding copyright ownership. 8 * The ASF licenses this file to You under the Apache License, Version 2.0 9 * (the "License"); you may not use this file except in compliance with 10 * the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 package com.sun.org.apache.bcel.internal.generic; 21 22 /** 23 * ICONST - Push value between -1, ..., 5, other values cause an exception 24 * 25 * <PRE>Stack: ... -> ..., </PRE> 26 * 27 */ 28 public class ICONST extends Instruction implements ConstantPushInstruction { 29 30 private int value; 31 32 33 /** 34 * Empty constructor needed for Instruction.readInstruction. 35 * Not to be used otherwise. 36 */ 37 ICONST() { 38 } 39 40 41 public ICONST(final int i) { 42 super(com.sun.org.apache.bcel.internal.Const.ICONST_0, (short) 1); 43 if ((i >= -1) && (i <= 5)) { 44 super.setOpcode((short) (com.sun.org.apache.bcel.internal.Const.ICONST_0 + i)); // Even works for i == -1 45 } else { 46 throw new ClassGenException("ICONST can be used only for value between -1 and 5: " + i); 47 } 48 value = i; 49 } 50 51 52 @Override 53 public Number getValue() { 54 return Integer.valueOf(value); 55 } 56 57 58 /** @return Type.INT 59 */ 60 @Override 61 public Type getType( final ConstantPoolGen cp ) { 62 return Type.INT; 63 } 64 65 66 /** 67 * Call corresponding visitor method(s). The order is: 68 * Call visitor methods of implemented interfaces first, then 69 * call methods according to the class hierarchy in descending order, 70 * i.e., the most specific visitXXX() call comes last. 71 * 72 * @param v Visitor object 73 */ 74 @Override 75 public void accept( final Visitor v ) { 76 v.visitPushInstruction(this); 77 v.visitStackProducer(this); 78 v.visitTypedInstruction(this); 79 v.visitConstantPushInstruction(this); 80 v.visitICONST(this); 81 } 82 }