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Java > Open Source Codes > com > mckoi > database > SimpleRowEnumeration


1 /**
2  * com.mckoi.database.SimpleRowEnumeration 19 Sep 2002
3  *
4  * Mckoi SQL Database ( http://www.mckoi.com/database )
5  * Copyright (C) 2000, 2001, 2002 Diehl and Associates, Inc.
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License
9  * Version 2 as published by the Free Software Foundation.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License Version 2 for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * Version 2 along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19  *
20  * Change Log:
21  *
22  *
23  */
24
25 package com.mckoi.database;
26
27 /**
28  * A RowEnumeration implementation that represents a sequence of rows that
29  * can be referenced in incremental order between 0 and row_count (exclusive).
30  * A Table that returns a SimpleRowEnumeration is guarenteed to provide valid
31  * TObject values via the 'getCellContents' method between rows 0 and
32  * getRowCount().
33  *
34  * @author Tobias Downer
35  */
36
37 public final class SimpleRowEnumeration implements RowEnumeration {
38
39   /**
40    * The current index.
41    */
42   private int index = 0;
43   
44   /**
45    * The number of rows in the enumeration.
46    */
47   final int row_count_store;
48
49   /**
50    * Constructs the RowEnumeration.
51    */
52   public SimpleRowEnumeration(int row_count) {
53     row_count_store = row_count;
54   }
55
56   public final boolean hasMoreRows() {
57     return (index < row_count_store);
58   }
59
60   public final int nextRowIndex() {
61     ++index;
62     return index - 1;
63   }
64
65 }
66
67
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