Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
InvokeListener |
|
| 1.25;1.25 |
1 | // Copyright 2005 The Apache Software Foundation | |
2 | // | |
3 | // Licensed under the Apache License, Version 2.0 (the "License"); | |
4 | // you may not use this file except in compliance with the License. | |
5 | // You may obtain a copy of the License at | |
6 | // | |
7 | // http://www.apache.org/licenses/LICENSE-2.0 | |
8 | // | |
9 | // Unless required by applicable law or agreed to in writing, software | |
10 | // distributed under the License is distributed on an "AS IS" BASIS, | |
11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
12 | // See the License for the specific language governing permissions and | |
13 | // limitations under the License. | |
14 | ||
15 | package org.apache.tapestry.components; | |
16 | ||
17 | import org.apache.tapestry.AbstractComponent; | |
18 | import org.apache.tapestry.IActionListener; | |
19 | import org.apache.tapestry.IMarkupWriter; | |
20 | import org.apache.tapestry.IRequestCycle; | |
21 | import org.apache.tapestry.link.DirectLink; | |
22 | import org.apache.tapestry.listener.ListenerInvoker; | |
23 | ||
24 | /** | |
25 | * Invokes a listener method, passing listener parameters. This is used when a | |
26 | * page or component needs some setup logic that can be best accomplished in | |
27 | * Java code. If the listener parameter is not bound, attempt to locate an | |
28 | * implicit listener named by the capitalized component id, prefixed by "do". | |
29 | * | |
30 | * @author Howard M. Lewis Ship | |
31 | * @since 4.0 | |
32 | */ | |
33 | 0 | public abstract class InvokeListener extends AbstractComponent |
34 | { | |
35 | ||
36 | protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle) | |
37 | { | |
38 | 0 | Object[] parameters = DirectLink |
39 | .constructServiceParameters(getParameters()); | |
40 | ||
41 | try | |
42 | { | |
43 | 0 | cycle.setListenerParameters(parameters); |
44 | ||
45 | 0 | IActionListener listener = getListener(); |
46 | ||
47 | 0 | if (listener == null) |
48 | 0 | listener = getContainer().getListeners().getImplicitListener(this); |
49 | ||
50 | 0 | getListenerInvoker().invokeListener(listener, this, cycle); |
51 | } | |
52 | finally | |
53 | { | |
54 | 0 | cycle.setListenerParameters(null); |
55 | 0 | } |
56 | 0 | } |
57 | ||
58 | /** Parameter. */ | |
59 | public abstract IActionListener getListener(); | |
60 | ||
61 | /** Parameter. */ | |
62 | public abstract Object getParameters(); | |
63 | ||
64 | /** Injected. */ | |
65 | public abstract ListenerInvoker getListenerInvoker(); | |
66 | } |