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.impl;
20
21 import java.util.ArrayList;
22 import java.util.List;
23
24 import net.sourceforge.mflow.api.MFlowUI;
25 import net.sourceforge.mflow.api.MFlowUIManager;
26
27 /***
28 * A class for managing instances of MFlowUI
29 *
30 * @author <a href="mailto:david@carr.name">David Carr</a>
31 * @version $Revision: 1.4 $
32 */
33 public class MFlowUIManagerImpl implements MFlowUIManager {
34 /***
35 * Private storage for all MFlowUI instances
36 */
37 private List instances = new ArrayList();
38
39 private MFlowUI currentUI = null;
40
41 MFlowUIManagerImpl() {
42 //No data needed
43 }
44
45 public synchronized void addInstance(MFlowUI instance) {
46 if (!this.instances.contains(instance)) {
47 this.instances.add(instance);
48 }
49 if (this.currentUI == null) {
50 this.currentUI = instance;
51 }
52 }
53
54 public synchronized MFlowUI[] getInstances() {
55 return (MFlowUI[]) this.instances.toArray(
56 new MFlowUI[this.instances.size()]);
57 }
58
59 public synchronized void removeInstance(MFlowUI ui) {
60 this.instances.remove(ui);
61 }
62
63 public void setCurrentInstance(MFlowUI ui) {
64 this.currentUI = ui;
65 }
66
67 public MFlowUI getCurrentInstance() {
68 return this.currentUI;
69 }
70 }
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