1 //----------------------------------------------------------------------
2 //
3 // PerfectJPattern: "Design patterns are good but components are better!"
4 // AbstractParameterlessHandler.java Copyright (c) 2009 Giovanni Azua Garcia
5 // bravegag@hotmail.com
6 //
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License
9 // as published by the Free Software Foundation; either version 3
10 // of the License, or (at your option) any later version.
11 //
12 // This program 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
15 // GNU General Public License for more details.
16 //
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, see <http://www.gnu.org/licenses/>.
19 //
20 //----------------------------------------------------------------------
21 package org.perfectjpattern.core.behavioral.chainofresponsibility;
22
23 import org.perfectjpattern.core.api.behavioral.chainofresponsibility.*;
24
25 /**
26 * Abstract reusable implementation of <code>IParameterlessHandler</code>
27 * interface.
28 * <br/>
29 *
30 * @see IParameterlessHandler
31 * @see NullRequest
32 *
33 * @author <a href="mailto:bravegag@hotmail.com">Giovanni Azua</a>
34 * @version $Revision: 1.0 $ $Date: Nov 6, 2007 6:15:59 PM $
35 */
36 public abstract
37 class AbstractParameterlessHandler
38 extends AbstractHandler<NullRequest>
39 implements IParameterlessHandler
40 {
41 //------------------------------------------------------------------------
42 // public
43 //------------------------------------------------------------------------
44 /**
45 * Constructs new instance of AbstractParameterlessHandler
46 */
47 public
48 AbstractParameterlessHandler()
49 {
50 super();
51 }
52
53 //------------------------------------------------------------------------
54 /**
55 * Constructs new instance of AbstractParameterlessHandler specifying the
56 * Successor Element.
57 *
58 * @param aSuccessor The Successor Element.
59 */
60 public
61 AbstractParameterlessHandler(IParameterlessHandler aSuccessor)
62 {
63 super(aSuccessor);
64 }
65
66 //------------------------------------------------------------------------
67 /**
68 * {@inheritDoc}
69 */
70 public final void
71 start()
72 {
73 super.start(NullRequest.getInstance());
74 }
75
76 //------------------------------------------------------------------------
77 /**
78 * {@inheritDoc}
79 */
80 @Override
81 public boolean
82 canHandle(NullRequest aRequest)
83 throws IllegalArgumentException
84 {
85 return true;
86 }
87
88 //------------------------------------------------------------------------
89 /**
90 * {@inheritDoc}
91 */
92 @Override
93 public final void
94 handle(NullRequest aRequest)
95 throws IllegalArgumentException
96 {
97 handle();
98 }
99 }