1 /*
   2  * reserved comment block
   3  * DO NOT REMOVE OR ALTER!
   4  */
   5 /*
   6  * Licensed to the Apache Software Foundation (ASF) under one or more
   7  * contributor license agreements.  See the NOTICE file distributed with
   8  * this work for additional information regarding copyright ownership.
   9  * The ASF licenses this file to You under the Apache License, Version 2.0
  10  * (the "License"); you may not use this file except in compliance with
  11  * the License.  You may obtain a copy of the License at
  12  *
  13  *      http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  * Unless required by applicable law or agreed to in writing, software
  16  * distributed under the License is distributed on an "AS IS" BASIS,
  17  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  18  * See the License for the specific language governing permissions and
  19  * limitations under the License.
  20  */
  21 
  22 package com.sun.org.apache.bcel.internal.classfile;
  23 
  24 
  25 
  26 import  com.sun.org.apache.bcel.internal.Constants;
  27 import  java.io.*;
  28 
  29 /**
  30  * This class is derived from the abstract
  31  * <A HREF="com.sun.org.apache.bcel.internal.classfile.Constant.html">Constant</A> class
  32  * and represents a reference to an int object.
  33  *
  34  * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  35  * @see     Constant
  36  */
  37 public final class ConstantInteger extends Constant implements ConstantObject {
  38   private int bytes;
  39 
  40   /**
  41    * @param bytes Data
  42    */
  43   public ConstantInteger(int bytes)
  44   {
  45     super(Constants.CONSTANT_Integer);
  46     this.bytes = bytes;
  47   }
  48 
  49   /**
  50    * Initialize from another object.
  51    */
  52   public ConstantInteger(ConstantInteger c) {
  53     this(c.getBytes());
  54   }
  55 
  56   /**
  57    * Initialize instance from file data.
  58    *
  59    * @param file Input stream
  60    * @throws IOException
  61    */
  62   ConstantInteger(DataInputStream file) throws IOException
  63   {
  64     this(file.readInt());
  65   }
  66 
  67   /**
  68    * Called by objects that are traversing the nodes of the tree implicitely
  69    * defined by the contents of a Java class. I.e., the hierarchy of methods,
  70    * fields, attributes, etc. spawns a tree of objects.
  71    *
  72    * @param v Visitor object
  73    */
  74   public void accept(Visitor v) {
  75     v.visitConstantInteger(this);
  76   }
  77 
  78   /**
  79    * Dump constant integer to file stream in binary format.
  80    *
  81    * @param file Output file stream
  82    * @throws IOException
  83    */
  84   public final void dump(DataOutputStream file) throws IOException
  85   {
  86     file.writeByte(tag);
  87     file.writeInt(bytes);
  88   }
  89 
  90   /**
  91    * @return data, i.e., 4 bytes.
  92    */
  93   public final int getBytes() { return bytes; }
  94 
  95   /**
  96    * @param bytes.
  97    */
  98   public final void setBytes(int bytes) {
  99     this.bytes = bytes;
 100   }
 101 
 102   /**
 103    * @return String representation.
 104    */
 105   public final String toString() {
 106     return super.toString() + "(bytes = " + bytes + ")";
 107   }
 108 
 109   /** @return Integer object
 110    */
 111   public Object getConstantValue(ConstantPool cp) {
 112     return new Integer(bytes);
 113   }
 114 }