1    /* ====================================================================
2     * The Apache Software License, Version 1.1
3     *
4     * Copyright (c) 2000 The Apache Software Foundation.  All rights
5     * reserved.
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8     * modification, are permitted provided that the following conditions
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11    * 1. Redistributions of source code must retain the above copyright
12    *    notice, this list of conditions and the following disclaimer.
13    *
14    * 2. Redistributions in binary form must reproduce the above copyright
15    *    notice, this list of conditions and the following disclaimer in
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19    * 3. The end-user documentation included with the redistribution,
20    *    if any, must include the following acknowledgment:
21    *       "This product includes software developed by the
22    *        Apache Software Foundation (http://www.apache.org/)."
23    *    Alternately, this acknowledgment may appear in the software itself,
24    *    if and wherever such third-party acknowledgments normally appear.
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31    * 5. Products derived from this software may not be called "Apache",
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33    *    permission of the Apache Software Foundation.
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35    * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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37    * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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49    * This software consists of voluntary contributions made by many
50    * individuals on behalf of the Apache Software Foundation.  For more
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52    * <http://www.apache.org/>.
53   *
54   * Portions of this software are based upon public domain software
55   * originally written at the National Center for Supercomputing Applications,
56   * University of Illinois, Urbana-Champaign.
57    *
58    * Portions of this software are based upon public domain software
59    * originally written at the National Center for Supercomputing Applications,
60    * University of Illinois, Urbana-Champaign.
61    */
62   
63   package org.apache.poi.hpsf.littleendian;
64   
65   import java.io.*;
66   
67   /**
68    * <p>Represents a class ID (16 bytes). Unlike other little-endian
69    * type the {@link ClassID} is not just 16 bytes stored in the wrong
70    * order. Instead, it is a double word (4 bytes) followed by two words
71    * (2 bytes each) followed by 8 bytes.</p>
72    *
73    * @see LittleEndian
74    *
75    * @author Rainer Klute (klute@rainer-klute.de)
76    * @version $Id: ClassID.java,v 1.2 2002/04/30 03:51:02 acoliver Exp $
77    * @since 2002-02-09
78    */
79   public class ClassID extends LittleEndian
80   {
81   
82       /**
83        * <p>Creates a {@link ClassID} and reads its value from a byte
84        * array.</p>
85        *
86        * @param src The byte array to read from.
87        *
88        * @param offset The offset of the first byte to read.
89        */
90       public ClassID(final byte[] src, final int offset)
91       {
92           super(src, offset);
93       }
94   
95   
96   
97       public final static int LENGTH = 16;
98   
99       public int length()
100      {
101          return LENGTH;
102      }
103  
104  
105  
106      public byte[] read(byte[] src, int offset)
107      {
108          LittleEndian[] b = new LittleEndian[11];
109          b[0] = new DWord(src, offset);
110          b[1] = new Word(src, offset += DWord.LENGTH);
111          b[2] = new Word(src, offset += Word.LENGTH);
112          b[3] = new Byte(src, offset += Word.LENGTH);
113          b[4] = new Byte(src, offset += Byte.LENGTH);
114          b[5] = new Byte(src, offset += Byte.LENGTH);
115          b[6] = new Byte(src, offset += Byte.LENGTH);
116          b[7] = new Byte(src, offset += Byte.LENGTH);
117          b[8] = new Byte(src, offset += Byte.LENGTH);
118          b[9] = new Byte(src, offset += Byte.LENGTH);
119          b[10] = new Byte(src, offset += Byte.LENGTH);
120          int capacity = 0;
121          for (int i = 0; i < b.length; i++)
122              capacity += b[i].getBytes().length;
123          bytes = new byte[capacity];
124          int pos = 0;
125          for (int i = 0; i < b.length; i++)
126          {
127              byte[] s = b[i].getBytes();
128              for (int j = 0; j < s.length; j++)
129                  bytes[pos++] = s[j];
130          }
131          return bytes;
132      }
133  
134  }
135