KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > smallsql > database > Store


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  * Store.java
29  * ---------------
30  * Author: Volker Berlin
31  *
32  */
33 package smallsql.database;
34
35 import java.sql.*;
36 /**
37  * @author Volker Berlin
38  *
39  */
40 abstract class Store {
41     
42     static final Store NULL = new StoreNull();
43     static final Store NOROW= new StoreNoCurrentRow();
44     
45     abstract boolean isNull(int offset) throws Exception JavaDoc;
46     
47     abstract boolean getBoolean( int offset, int dataType) throws Exception JavaDoc;
48     
49     abstract byte[] getBytes( int offset, int dataType) throws Exception JavaDoc;
50     
51     abstract double getDouble( int offset, int dataType) throws Exception JavaDoc;
52     
53     abstract float getFloat( int offset, int dataType) throws Exception JavaDoc;
54     
55     abstract int getInt( int offset, int dataType) throws Exception JavaDoc;
56     
57     abstract long getLong( int offset, int dataType) throws Exception JavaDoc;
58     
59     abstract long getMoney( int offset, int dataType) throws Exception JavaDoc;
60     
61     abstract MutableNumeric getNumeric( int offset, int dataType) throws Exception JavaDoc;
62     
63     abstract Object JavaDoc getObject( int offset, int dataType) throws Exception JavaDoc;
64     
65     abstract String JavaDoc getString( int offset, int dataType) throws Exception JavaDoc;
66     
67     
68     
69     /**
70      * Get the status of the current page.
71      * @return true if the current row valid. false if deleted or updated data.
72      */
73     boolean isValidPage(){
74         return false;
75     }
76     
77     abstract void scanObjectOffsets( int[] offsets, int dataTypes[] );
78     
79     abstract int getUsedSize();
80     
81     abstract long getNextPagePos();
82     
83     abstract void deleteRow(SSConnection con) throws SQLException;
84 }
Popular Tags