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Java > Open Source Codes > org > apache > cocoon > forms > event > AbstractFormHandler


1 /*
2  * Copyright 1999-2004 The Apache Software Foundation.
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, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package org.apache.cocoon.forms.event;
17
18 /**
19  * Abstract implementation of {@link FormHandler}, which checks the type
20  * of the WidgetEvent and calls the more specific {@link #handleActionEvent(ActionEvent)}
21  * or {@link #handleValueChangedEvent(ValueChangedEvent)} methods.
22  *
23  * @version $Id: AbstractFormHandler.java 151179 2005-02-03 16:55:16Z tim $
24  */
25 public abstract class AbstractFormHandler implements FormHandler {
26
27     public void handleEvent(WidgetEvent widgetEvent) {
28         if (widgetEvent instanceof ActionEvent)
29             handleActionEvent((ActionEvent)widgetEvent);
30         else if (widgetEvent instanceof ValueChangedEvent)
31             handleValueChangedEvent((ValueChangedEvent)widgetEvent);
32     }
33
34     /**
35      * Called when an ActionEvent occured.
36      */
37     public abstract void handleActionEvent(ActionEvent actionEvent);
38
39     /**
40      * Called when an ValueChangedEvent occured.
41      */
42     public abstract void handleValueChangedEvent(ValueChangedEvent valueChangedEvent);
43
44 }
45
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