1 /*
2 * Copyright 2004-2008 the Seasar Foundation and the Others.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
13 * either express or implied. See the License for the specific language
14 * governing permissions and limitations under the License.
15 */
16 package org.seasar.uruma.rcp.binding;
17
18 import java.util.ArrayList;
19 import java.util.List;
20
21 import org.eclipse.core.commands.AbstractHandler;
22 import org.eclipse.core.commands.ExecutionEvent;
23 import org.eclipse.core.commands.ExecutionException;
24 import org.eclipse.core.commands.HandlerEvent;
25 import org.eclipse.core.commands.IHandler;
26 import org.eclipse.swt.widgets.Event;
27 import org.eclipse.swt.widgets.Listener;
28 import org.seasar.uruma.log.UrumaLogger;
29 import org.seasar.uruma.util.AssertionUtil;
30
31 /**
32 * 任意のメソッドを呼び出すことができる、汎用的な {@link IHandler} の実装クラスです。<br />
33 *
34 * @author y-komori
35 */
36 public class GenericHandler extends AbstractHandler {
37 protected static final UrumaLogger logger = UrumaLogger
38 .getLogger(GenericHandler.class);
39
40 protected List<Listener> listeners = new ArrayList<Listener>();
41
42 protected boolean enabled = true;
43
44 /*
45 * @see org.eclipse.core.commands.AbstractHandler#execute(org.eclipse.core.commands.ExecutionEvent)
46 */
47 @Override
48 public Object execute(final ExecutionEvent event) throws ExecutionException {
49 int size = listeners.size();
50 for (int i = 0; i < size; i++) {
51 try {
52 listeners.get(i).handleEvent((Event) event.getTrigger());
53 } catch (Throwable ex) {
54 logger.log(ex);
55 }
56 }
57 return null;
58 }
59
60 /**
61 * {@link Listener} を追加します。<br />
62 *
63 * @param listener
64 * {@link Listener} オブジェクト
65 */
66 public void addListener(final Listener listener) {
67 AssertionUtil.assertNotNull("listener", listener);
68 this.listeners.add(listener);
69 }
70
71 /*
72 * @see org.eclipse.core.commands.AbstractHandler#isEnabled()
73 */
74 @Override
75 public boolean isEnabled() {
76 return enabled;
77 }
78
79 /**
80 * ハンドラのイネーブル状態を変更します。<br />
81 *
82 * @param enabled
83 * <code>true</code> の場合、イネーブル。<code>false</code>
84 * の場合、ディスエーブル。
85 */
86 public void setEnabled(final boolean enabled) {
87 if (this.enabled != enabled) {
88 this.enabled = enabled;
89 fireHandlerChanged(new HandlerEvent(this, true, false));
90 }
91 }
92 }