Clover Coverage Report - perfectjpattern(Aggregated)
Coverage timestamp: Sat Feb 28 2009 14:35:07 CET
../../../../../img/srcFileCovDistChart10.png 0% of files have more coverage
4   82   4   1.33
2   28   1   3
3     1.33  
1    
 
  OnlyOneHandleStrategy       Line # 37 4 0% 4 0 100% 1.0
 
  (1)
 
1    //----------------------------------------------------------------------
2    //
3    // PerfectJPattern: "Design patterns are good but components are better!"
4    // FirstNHandleStrategy.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    * Concrete implementation of <code>IChainStrategy</code> that allows
27    * only one <code>IHandler</code> to handle the given request then stops the
28    * processing of the chain.
29    * <br/><br/>
30    * <code>OnlyOneHandleStrategy</code> is stateless, reentrant and a Singleton
31    * therefore it may not be directly instantiated, neither it may be extended.
32    *
33    * @author <a href="mailto:bravegag@hotmail.com">Giovanni Azua</a>
34    * @version $Revision: 1.0 $ $Date: Nov 8, 2007 9:57:12 PM $
35    */
36    public final
 
37    class OnlyOneHandleStrategy
38    implements IChainStrategy
39    {
40    //------------------------------------------------------------------------
41    /**
42    * Returns Singleton instance of <code>OnlyOneHandlesStrategy</code>.
43    *
44    * @return Singleton instance of <code>OnlyOneHandlesStrategy</code>.
45    */
 
46  26 toggle public static IChainStrategy
47    getInstance()
48    {
49  26 return INSTANCE;
50    }
51   
52    //------------------------------------------------------------------------
53    /**
54    * {@inheritDoc}
55    */
 
56  9 toggle public void
57    process(IHandler<Object> aHandler, Object aRequest)
58    {
59  9 if (aHandler.canHandle(aRequest))
60    {
61  6 aHandler.handle(aRequest);
62    }
63    else
64    {
65  3 aHandler.getSuccessor().start(aRequest);
66    }
67    }
68   
69    //------------------------------------------------------------------------
70    // private
71    //------------------------------------------------------------------------
 
72  2 toggle private
73    OnlyOneHandleStrategy()
74    {
75    // do nothing
76    }
77   
78    //------------------------------------------------------------------------
79    // members
80    //------------------------------------------------------------------------
81    private static final IChainStrategy INSTANCE = new OnlyOneHandleStrategy();
82    }