1 /*
2 * (C) 2002 David Carr david@carr.name
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18
19 package net.sourceforge.mflow.api;
20
21 /***
22 * @author carrd
23 */
24 public abstract class MsgFactory {
25 /***
26 * The instance to return from {@link #getInstance()}
27 */
28 private static MsgFactory sInstance;
29
30 /***
31 * Sets the passed instance to be returned by {@link #getInstance()}
32 *
33 * @param aInstance the new instance to use
34 */
35 protected final void register(final MsgFactory aInstance) {
36 sInstance = aInstance;
37 }
38
39 /***
40 * @return an instance of {@link MsgFactory}
41 */
42 public static MsgFactory getInstance() {
43 return sInstance;
44 }
45
46 /***
47 * Creates an instance of {@link Msg}
48 *
49 * @return a new instance of {@link Msg}
50 */
51 public abstract Msg createMsg();
52 }
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