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Java > Open Source Codes > smallsql > database > DataSource


1 /* =============================================================
2  * SmallSQL : a free Java DBMS library for the Java(tm) platform
3  * =============================================================
4  *
5  * (C) Copyright 2004-2006, by Volker Berlin.
6  *
7  * Project Info: http://www.smallsql.de/
8  *
9  * This library is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU Lesser General Public License as published by
11  * the Free Software Foundation; either version 2.1 of the License, or
12  * (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful, but
15  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17  * License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
22  * USA.
23  *
24  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
25  * in the United States and other countries.]
26  *
27  * ---------------
28  * DataSource.java
29  * ---------------
30  * Author: Volker Berlin
31  *
32  */
33 package smallsql.database;
34
35
36
37 /**
38  * This class implements the interface to access the data of a RowSource.
39  * It is a top level RowSource
40  * It is a abstact class because interfaces are ever public.
41  *
42  * Know Implementations are:
43  * - TableResult
44  * - GroupResult
45  *
46  * * @author Volker Berlin
47  *
48  */
49 abstract class DataSource extends RowSource{
50
51
52     abstract boolean isNull( int colIdx ) throws Exception JavaDoc;
53     abstract boolean getBoolean( int colIdx ) throws Exception JavaDoc;
54
55     abstract int getInt( int colIdx ) throws Exception JavaDoc;
56
57     abstract long getLong( int colIdx ) throws Exception JavaDoc;
58
59     abstract float getFloat( int colIdx ) throws Exception JavaDoc;
60
61     abstract double getDouble( int colIdx ) throws Exception JavaDoc;
62
63     abstract long getMoney( int colIdx ) throws Exception JavaDoc;
64
65     abstract MutableNumeric getNumeric( int colIdx ) throws Exception JavaDoc;
66
67     abstract Object JavaDoc getObject( int colIdx ) throws Exception JavaDoc;
68
69     abstract String JavaDoc getString( int colIdx ) throws Exception JavaDoc;
70
71     abstract byte[] getBytes( int colIdx ) throws Exception JavaDoc;
72
73     abstract int getDataType( int colIdx );
74
75
76     boolean init( SSConnection con ) throws Exception JavaDoc{return false;}
77     String JavaDoc getAlias(){return null;}
78     
79     abstract TableView getTableView();
80     
81
82     
83 }
84
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