CallMethod


1   /*====================================================================
2   
3   OpenCCM: The Open CORBA Component Model Platform
4   Copyright (C) 2000-2004 INRIA - USTL - LIFL - GOAL
5   Contact: openccm@objectweb.org
6   
7   This library is free software; you can redistribute it and/or
8   modify it under the terms of the GNU Lesser General Public
9   License as published by the Free Software Foundation; either
10  version 2.1 of the License, or any later version.
11  
12  This library is distributed in the hope that it will be useful,
13  but WITHOUT ANY WARRANTY; without even the implied warranty of
14  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  Lesser General Public License for more details.
16  
17  You should have received a copy of the GNU Lesser General Public
18  License along with this library; if not, write to the Free Software
19  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
20  USA
21  
22  Initial developer(s): Pierre Carpentier.
23  Contributor(s): Philippe Merle.
24  
25  ---------------------------------------------------------------------
26  $Id: CallMethod.java,v 1.1 2004/05/26 11:25:35 carpentier Exp $
27  ====================================================================*/
28  
29  package org.objectweb.openccm.uml.transformation.rules.xml;
30  
31  import ispuml.mdaTransformation.RuleContext;
32  import ispuml.mdaTransformation.TransformationException;
33  import ispuml.mdaTransformation.ActionBase;
34  import ispuml.mdaTransformation.rules.xml.CompositeXmlAction;
35  
36  
37  /**
38   * This action calls a method to the bean.
39   */
40  public class CallMethod extends CompositeXmlAction {
41      
42      /** The name of the method to call. */
43      private String   methodName;
44  
45      /**
46       * Constructor.
47       */
48      public CallMethod() {
49          // The src property is not required. If it is not set, use the bean provided
50          // as parameter.
51          isSrcPropertyRequired = false;
52          isDstPropertyRequired = false;
53          action = new TransformAction();
54      }
55      
56      /**
57       * Sets the name of the method to call.
58       * @param methodName The method name.
59       */
60      public void setMethodName (String   methodName) {
61          this.methodName = methodName;
62      }
63  
64      /**
65       * Inner class
66       */
67      class TransformAction extends ActionBase {
68          /**
69           * Calls the method to the bean.
70           * @param bean The bean which contains the method to invoke.
71           * @param request The context.
72           * @return Object The result of the method invocation.
73           */
74          public Object   execute(Object   bean, RuleContext request) throws TransformationException {
75              try {
76                  Class   param [] = new Class  [0];
77                  java.lang.reflect.Method   method = bean.getClass().getMethod(methodName, param);
78                  return method.invoke(bean, null);
79              } catch (Exception   exc) {
80                  throw new TransformationException("The method " + methodName + "() does not exist on this bean.");
81              }
82          }
83  
84      } // end class
85  }
86
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