1 /*
2 * $Source$
3 * $Revision$
4 *
5 * Copyright (C) 2000 Chris Kimpton
6 *
7 * Part of Melati (http://melati.org), a framework for the rapid
8 * development of clean, maintainable web applications.
9 *
10 * Melati is free software; Permission is granted to copy, distribute
11 * and/or modify this software under the terms either:
12 *
13 * a) the GNU General Public License as published by the Free Software
14 * Foundation; either version 2 of the License, or (at your option)
15 * any later version,
16 *
17 * or
18 *
19 * b) any version of the Melati Software License, as published
20 * at http://melati.org
21 *
22 * You should have received a copy of the GNU General Public License and
23 * the Melati Software License along with this program;
24 * if not, write to the Free Software Foundation, Inc.,
25 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the
26 * GNU General Public License and visit http://melati.org to obtain the
27 * Melati Software License.
28 *
29 * Feel free to contact the Developers of Melati (http://melati.org),
30 * if you would like to work out a different arrangement than the options
31 * outlined here. It is our intention to allow Melati to be used by as
32 * wide an audience as possible.
33 *
34 * This program is distributed in the hope that it will be useful,
35 * but WITHOUT ANY WARRANTY; without even the implied warranty of
36 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
37 * GNU General Public License for more details.
38 *
39 * Contact details for copyright holder:
40 *
41 * Chris Kimpton (kimtoc@techie.com)
42 *
43 */
44 package org.melati.poem.odmg;
45
46 /**
47 * Factory object for getting new ODMG/poem related objects
48 **/
49 public final class ODMGFactory {
50 private ODMGFactory() {}
51
52 private static Database _db = Database.getNewDatabase();
53
54 /**
55 * @return a new database
56 */
57 public static org.odmg.Database getNewDatabase() { return getDb(); }
58
59 /**
60 * Get a new database.
61 */
62 public static org.melati.poem.Database getPoemDatabase()
63 throws org.odmg.ODMGRuntimeException {
64 return getDb().getPoemDatabase(); }
65
66 /**
67 * Get a new Transaction.
68 */
69 public static org.odmg.Transaction getNewTransaction(
70 org.odmg.Database db) {
71 return Transaction.getNewTransaction(db);
72 }
73
74 static void resetDb() {
75 _db = null;
76 }
77
78 private static synchronized Database getDb() {
79 if (_db == null) {
80 _db = Database.getNewDatabase();
81 }
82 return _db;
83 }
84 }