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Java > Open Source Codes > jxl > write > biff > HeaderRecord


1 /*********************************************************************
2 *
3 * Copyright (C) 2002 Andrew Khan
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 ***************************************************************************/
19
20 package jxl.write.biff;
21
22 import jxl.biff.Type;
23 import jxl.biff.IntegerHelper;
24 import jxl.biff.StringHelper;
25 import jxl.biff.WritableRecordData;
26
27 /**
28  * Record which specifies a print header for a work sheet
29  */
30 class HeaderRecord extends WritableRecordData
31 {
32   /**
33    * The binary data
34    */
35   private byte[] data;
36   /**
37    * The print header string
38    */
39   private String JavaDoc header;
40   
41   /**
42    * Constructor
43    *
44    * @param s the header string
45    */
46   public HeaderRecord(String JavaDoc h)
47   {
48     super(Type.HEADER);
49
50     header = h;
51   }
52
53   /**
54    * Consructor invoked when copying a sheets
55    *
56    * @param hr the read header record
57    */
58   public HeaderRecord(HeaderRecord hr)
59   {
60     super(Type.HEADER);
61
62     header = hr.header;
63   }
64
65   /**
66    * Gets the binary data for output to file
67    *
68    * @return the binary data
69    */
70   public byte[] getData()
71   {
72     if (header == null || header.length() == 0)
73     {
74       data = new byte[0];
75       return data;
76     }
77
78     data = new byte[header.length() * 2 + 3];
79     IntegerHelper.getTwoBytes(header.length(), data, 0);
80     data[2] = (byte) 0x1;
81
82     StringHelper.getUnicodeBytes(header, data, 3);
83
84     return data;
85   }
86 }
87
88
89
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