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Java > Open Source Codes > org > riotfamily > forms > controller > NamedMethodHandler


1 /* ***** BEGIN LICENSE BLOCK *****
2  * Version: MPL 1.1
3  * The contents of this file are subject to the Mozilla Public License Version
4  * 1.1 (the "License"); you may not use this file except in compliance with
5  * the License. You may obtain a copy of the License at
6  * http://www.mozilla.org/MPL/
7  *
8  * Software distributed under the License is distributed on an "AS IS" basis,
9  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
10  * for the specific language governing rights and limitations under the
11  * License.
12  *
13  * The Original Code is Riot.
14  *
15  * The Initial Developer of the Original Code is
16  * Neteye GmbH.
17  * Portions created by the Initial Developer are Copyright (C) 2006
18  * the Initial Developer. All Rights Reserved.
19  *
20  * Contributor(s):
21  * Felix Gnass [fgnass at neteye dot de]
22  *
23  * ***** END LICENSE BLOCK ***** */

24 package org.riotfamily.forms.controller;
25
26 import java.lang.reflect.Method JavaDoc;
27
28 import javax.servlet.http.HttpServletRequest JavaDoc;
29 import javax.servlet.http.HttpServletResponse JavaDoc;
30
31 import org.riotfamily.forms.Form;
32 import org.springframework.util.Assert;
33 import org.springframework.web.servlet.ModelAndView;
34 import org.springframework.web.servlet.mvc.Controller;
35
36 public class NamedMethodHandler implements FormSubmissionHandler {
37     
38     private static final Class JavaDoc[] HANDLER_PARAM_TYPES = new Class JavaDoc[] {
39         Form.class, HttpServletRequest JavaDoc.class, HttpServletResponse JavaDoc.class
40     };
41     
42     private Controller controller;
43     
44     private Method JavaDoc handlerMethod;
45     
46     public NamedMethodHandler(Controller controller, String JavaDoc methodName) {
47         this.controller = controller;
48         try {
49             handlerMethod = controller.getClass().getMethod(
50                     methodName, HANDLER_PARAM_TYPES);
51         }
52         catch (SecurityException JavaDoc e) {
53             throw new RuntimeException JavaDoc(e);
54         }
55         catch (NoSuchMethodException JavaDoc e) {
56             throw new RuntimeException JavaDoc(e);
57         }
58         
59         Assert.isTrue(ModelAndView.class.isAssignableFrom(
60                 handlerMethod.getReturnType()),
61                 "Handler method must return a ModelAndView");
62     }
63
64     public ModelAndView handleFormSubmission(Form form,
65             HttpServletRequest JavaDoc request, HttpServletResponse JavaDoc response)
66             throws Exception JavaDoc {
67         
68         Object JavaDoc[] args = new Object JavaDoc[] {form, request, response};
69         return (ModelAndView) handlerMethod.invoke(controller, args);
70     }
71
72 }
73
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