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