01: /*
02: * $Id: DefragCommand.java,v 1.7 2004/08/31 02:34:41 ahimanikya Exp $
03: * =======================================================================
04: * Copyright (c) 2002-2004 Axion Development Team. All rights reserved.
05: *
06: * Redistribution and use in source and binary forms, with or without
07: * modification, are permitted provided that the following conditions
08: * are met:
09: *
10: * 1. Redistributions of source code must retain the above
11: * copyright notice, this list of conditions and the following
12: * disclaimer.
13: *
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in
16: * the documentation and/or other materials provided with the
17: * distribution.
18: *
19: * 3. The names "Tigris", "Axion", nor the names of its contributors may
20: * not be used to endorse or promote products derived from this
21: * software without specific prior written permission.
22: *
23: * 4. Products derived from this software may not be called "Axion", nor
24: * may "Tigris" or "Axion" appear in their names without specific prior
25: * written permission.
26: *
27: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
30: * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
31: * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
32: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
33: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
34: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
35: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
36: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
37: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38: * =======================================================================
39: */
40: package org.axiondb.engine.commands;
41:
42: import org.axiondb.AxionException;
43: import org.axiondb.Database;
44: import org.axiondb.engine.DiskDatabase;
45: import org.axiondb.jdbc.AxionResultSet;
46:
47: /**
48: * A <tt>DEFRAG TABLE tableName</tt> command, to compact the a disk resident table
49: *
50: * @version $Revision: 1.7 $ $Date: 2004/08/31 02:34:41 $
51: * @author Sudhendra Seshachala
52: * @author Ahimanikya Satapathy
53: */
54: public class DefragCommand extends BaseAxionCommand {
55:
56: public DefragCommand() {
57: }
58:
59: public int executeUpdate(Database db) throws AxionException {
60: if (_tableName == null) {
61: throw new AxionException("Table name can't be null");
62: }
63:
64: if (db instanceof DiskDatabase) {
65: DiskDatabase diskDB = (DiskDatabase) db;
66: return diskDB.defragTable(_tableName);
67: }
68: return 0;
69: }
70:
71: public boolean execute(Database db) throws AxionException {
72: executeUpdate(db);
73: return false;
74: }
75:
76: /** Unsupported */
77: public AxionResultSet executeQuery(Database database)
78: throws AxionException {
79: throw new UnsupportedOperationException("Use execute.");
80: }
81:
82: public void setObjectName(String tableName) {
83: _tableName = tableName;
84: }
85:
86: private String _tableName;
87: }
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