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 
  21 package com.sun.org.apache.bcel.internal.classfile;
  22 
  23 
  24 import  com.sun.org.apache.bcel.internal.Constants;
  25 import  java.io.*;
  26 
  27 /**
  28  * This class is derived from the abstract
  29  * <A HREF="com.sun.org.apache.bcel.internal.classfile.Constant.html">Constant</A> class
  30  * and represents a reference to a long object.
  31  *
  32  * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  33  * @see     Constant
  34  */
  35 public final class ConstantLong extends Constant implements ConstantObject {
  36   private long bytes;
  37 
  38   /**
  39    * @param bytes Data
  40    */
  41   public ConstantLong(long bytes)
  42   {
  43     super(Constants.CONSTANT_Long);
  44     this.bytes = bytes;
  45   }
  46   /**
  47    * Initialize from another object.
  48    */
  49   public ConstantLong(ConstantLong c) {
  50     this(c.getBytes());
  51   }
  52   /**
  53    * Initialize instance from file data.
  54    *
  55    * @param file Input stream
  56    * @throws IOException
  57    */
  58   ConstantLong(DataInputStream file) throws IOException
  59   {
  60     this(file.readLong());
  61   }
  62   /**
  63    * Called by objects that are traversing the nodes of the tree implicitely
  64    * defined by the contents of a Java class. I.e., the hierarchy of methods,
  65    * fields, attributes, etc. spawns a tree of objects.
  66    *
  67    * @param v Visitor object
  68    */
  69   public void accept(Visitor v) {
  70     v.visitConstantLong(this);
  71   }
  72   /**
  73    * Dump constant long to file stream in binary format.
  74    *
  75    * @param file Output file stream
  76    * @throws IOException
  77    */
  78   public final void dump(DataOutputStream file) throws IOException
  79   {
  80     file.writeByte(tag);
  81     file.writeLong(bytes);
  82   }
  83   /**
  84    * @return data, i.e., 8 bytes.
  85    */
  86   public final long getBytes() { return bytes; }
  87   /**
  88    * @param bytes.
  89    */
  90   public final void setBytes(long bytes) {
  91     this.bytes = bytes;
  92   }
  93   /**
  94    * @return String representation.
  95    */
  96   public final String toString() {
  97     return super.toString() + "(bytes = " + bytes + ")";
  98   }
  99 
 100   /** @return Long object
 101    */
 102   public Object getConstantValue(ConstantPool cp) {
 103     return bytes;
 104   }
 105 }