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Java > Open Source Codes > org > apache > tapestry > wml > OnEvent


1 // Copyright 2004, 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.wml;
16
17 import org.apache.tapestry.AbstractComponent;
18 import org.apache.tapestry.IMarkupWriter;
19 import org.apache.tapestry.IRequestCycle;
20
21 /**
22  * The onevent element binds a task to a particular intrinsic event for the immediately enclosing element, ie,
23  * specifying an onevent element inside an "XYZ" element associates an intrinsic event binding with the "XYZ" element.
24  * The user agent must ignore any onevent element specifying a type that does not correspond to a legal intrinsic event
25  * for the immediately enclosing element.
26  *
27  * @author David Solis
28  * @since 3.0
29  *
30  **/
31
32 public abstract class OnEvent extends AbstractComponent
33 {
34     /**
35      * @see AbstractComponent#renderComponent(IMarkupWriter, IRequestCycle)
36      **/
37
38     protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle)
39     {
40         boolean render = !cycle.isRewinding();
41
42         if (render)
43         {
44             writer.begin("onevent");
45
46             writer.attribute("type", getType());
47
48             renderInformalParameters(writer, cycle);
49         }
50
51         renderBody(writer, cycle);
52
53         if (render)
54         {
55             writer.end();
56         }
57     }
58
59     public abstract String JavaDoc getType();
60
61 }
62
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