01: /*
02: * $Id: ConstraintCommand.java,v 1.3 2005/12/20 18:32:28 ahimanikya Exp $
03: * =======================================================================
04: * Copyright (c) 2003 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:
41: package org.axiondb.engine.commands;
42:
43: import org.axiondb.AxionException;
44: import org.axiondb.Database;
45: import org.axiondb.Table;
46: import org.axiondb.jdbc.AxionResultSet;
47:
48: /**
49: * @version $Revision: 1.3 $ $Date: 2005/12/20 18:32:28 $
50: * @author Rodney Waldhoff
51: * @author Ahimanikya Satapathy
52: */
53: public abstract class ConstraintCommand extends BaseAxionCommand {
54: public ConstraintCommand(String tableName) {
55: setTableName(tableName);
56: }
57:
58: public void setTableName(String name) {
59: _tableName = name;
60: }
61:
62: public String getTableName() {
63: return _tableName;
64: }
65:
66: public boolean execute(Database db) throws AxionException {
67: assertNotReadOnly(db);
68: if (null == _tableName) {
69: throw new AxionException("Table name must not be null.");
70: }
71:
72: Table table = db.getTable(_tableName);
73: if (null == table) {
74: throw new AxionException("Table " + _tableName
75: + " not found.");
76: }
77:
78: execute(db, table);
79: db.tableAltered(table);
80: return false;
81: }
82:
83: /** Unsupported */
84: public AxionResultSet executeQuery(Database database)
85: throws AxionException {
86: throw new UnsupportedOperationException("Use execute.");
87: }
88:
89: public int executeUpdate(Database database) throws AxionException {
90: execute(database);
91: return 0;
92: }
93:
94: protected abstract void execute(Database db, Table table)
95: throws AxionException;
96:
97: private String _tableName;
98: }
|