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.classfile; 020 021import java.io.DataInput; 022import java.io.DataOutputStream; 023import java.io.IOException; 024 025import org.apache.bcel.Const; 026 027/** 028 * This class is derived from the abstract {@link Constant} and represents a reference to an int object. 029 * 030 * @see Constant 031 */ 032public final class ConstantInteger extends Constant implements ConstantObject { 033 034 private int bytes; 035 036 /** 037 * Initialize from another object. 038 * 039 * @param c Source to copy. 040 */ 041 public ConstantInteger(final ConstantInteger c) { 042 this(c.getBytes()); 043 } 044 045 /** 046 * Initialize instance from file data. 047 * 048 * @param file Input stream 049 * @throws IOException if an I/O error occurs. 050 */ 051 ConstantInteger(final DataInput file) throws IOException { 052 this(file.readInt()); 053 } 054 055 /** 056 * @param bytes Data 057 */ 058 public ConstantInteger(final int bytes) { 059 super(Const.CONSTANT_Integer); 060 this.bytes = bytes; 061 } 062 063 /** 064 * Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class. 065 * I.e., the hierarchy of methods, fields, attributes, etc. spawns a tree of objects. 066 * 067 * @param v Visitor object 068 */ 069 @Override 070 public void accept(final Visitor v) { 071 v.visitConstantInteger(this); 072 } 073 074 /** 075 * Dump constant integer to file stream in binary format. 076 * 077 * @param file Output file stream 078 * @throws IOException if an I/O error occurs. 079 */ 080 @Override 081 public void dump(final DataOutputStream file) throws IOException { 082 file.writeByte(super.getTag()); 083 file.writeInt(bytes); 084 } 085 086 /** 087 * @return data, i.e., 4 bytes. 088 */ 089 public int getBytes() { 090 return bytes; 091 } 092 093 /** 094 * @return Integer object 095 */ 096 @Override 097 public Object getConstantValue(final ConstantPool cp) { 098 return Integer.valueOf(bytes); 099 } 100 101 /** 102 * @param bytes the raw bytes that represent this integer 103 */ 104 public void setBytes(final int bytes) { 105 this.bytes = bytes; 106 } 107 108 /** 109 * @return String representation. 110 */ 111 @Override 112 public String toString() { 113 return super.toString() + "(bytes = " + bytes + ")"; 114 } 115}