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Java > Open Source Codes > jxl > read > biff > BiffRecordReader


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.read.biff;
21
22 /**
23  * Serves up Record objects from a biff file. This object is used by the
24  * demo programs BiffDump and ... only and has no influence whatsoever on
25  * the JExcelApi reading and writing of excel sheets
26  */
27 public class BiffRecordReader
28 {
29   /**
30    * The biff file
31    */
32   private File file;
33
34   /**
35    * The current record retrieved
36    */
37   private Record record;
38
39   /**
40    * Constructor
41    *
42    * @param f the biff file
43    */
44   public BiffRecordReader(File f)
45   {
46     file = f;
47   }
48
49   /**
50    * Sees if there are any more records to read
51    *
52    * @return TRUE if there are more records, FALSE otherwise
53    */
54   public boolean hasNext()
55   {
56     return file.hasNext();
57   }
58
59   /**
60    * Gets the next record
61    *
62    * @return the next record
63    */
64   public Record next()
65   {
66     record = file.next();
67     return record;
68   }
69
70   /**
71    * Gets the position of the current record in the biff file
72    *
73    * @return the position
74    */
75   public int getPos()
76   {
77     return file.getPos() - record.getLength() - 4;
78   }
79 }
80
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