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Java > Open Source Codes > net > sf > jga > swing > GenericAction


1 // ============================================================================
2 // $Id: GenericAction.java,v 1.4 2005/08/02 23:45:21 davidahall Exp $
3 // Copyright (c) 2004-2005 David A. Hall
4 // ============================================================================
5 // The contents of this file are subject to the Common Development and
6 // Distribution License (CDDL), Version 1.0 (the License); you may not use this
7 // file except in compliance with the License. You should have received a copy
8 // of the the License along with this file: if not, a copy of the License is
9 // available from Sun Microsystems, Inc.
10 //
11 // http://www.sun.com/cddl/cddl.html
12 //
13 // From time to time, the license steward (initially Sun Microsystems, Inc.) may
14 // publish revised and/or new versions of the License. You may not use,
15 // distribute, or otherwise make this file available under subsequent versions
16 // of the License.
17 //
18 // Alternatively, the contents of this file may be used under the terms of the
19 // GNU Lesser General Public License Version 2.1 or later (the "LGPL"), in which
20 // case the provisions of the LGPL are applicable instead of those above. If you
21 // wish to allow use of your version of this file only under the terms of the
22 // LGPL, and not to allow others to use your version of this file under the
23 // terms of the CDDL, indicate your decision by deleting the provisions above
24 // and replace them with the notice and other provisions required by the LGPL.
25 // If you do not delete the provisions above, a recipient may use your version
26 // of this file under the terms of either the CDDL or the LGPL.
27 //
28 // This library is distributed in the hope that it will be useful,
29 // but WITHOUT ANY WARRANTY; without even the implied warranty of
30 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
31 // ============================================================================
32
33 package net.sf.jga.swing;
34
35 import java.awt.event.ActionEvent JavaDoc;
36 import javax.swing.AbstractAction JavaDoc;
37 import javax.swing.Icon JavaDoc;
38 import net.sf.jga.fn.UnaryFunctor;
39 import net.sf.jga.fn.adaptor.Identity;
40
41 /**
42  * Action that invokes a functor given at construction.
43  * <p>
44  * Copyright &copy; 2004-2005 David A. Hall
45  * @author <a HREF="mailto:davidahall@users.sf.net">David A. Hall</a>
46  */
47
48 public class GenericAction extends AbstractAction JavaDoc {
49
50     static final long serialVersionUID = 7439713855391597694L;
51
52     // The functor to execute
53 private UnaryFunctor<ActionEvent JavaDoc,?> _fn;
54
55     /**
56      * Builds a GenericAction with the default label and no icon.
57      */
58     public GenericAction(UnaryFunctor<ActionEvent JavaDoc,?> fn) {
59         super();
60         setFunctor(fn);
61     }
62
63     /**
64      * Builds a GenericAction with the given label and no icon.
65      */
66     public GenericAction(UnaryFunctor<ActionEvent JavaDoc,?> fn, String JavaDoc name) {
67         super(name);
68         setFunctor(fn);
69     }
70     
71
72     /**
73      * Builds a GenericAction with the given label and no icon.
74      */
75     public GenericAction(UnaryFunctor<ActionEvent JavaDoc,?> fn, String JavaDoc name, Icon JavaDoc icon) {
76         super(name, icon);
77         setFunctor(fn);
78     }
79
80     
81     /**
82      * Sets the functor: if null, uses a rational default functor, otherwise uses
83      * the given functor.
84      */
85     private final void setFunctor(UnaryFunctor<ActionEvent JavaDoc,?> fn) {
86         if (fn == null)
87             _fn = new Identity<ActionEvent JavaDoc>();
88         else
89             _fn = fn;
90     }
91
92     
93     /**
94      * Passes the action event to the functor given at construction. The
95      * result of the functor, if any, is discareded.
96      */
97     public void actionPerformed(ActionEvent JavaDoc e) {
98         _fn.fn(e);
99     }
100 }
101
102
103
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