1 /***
2 * Redistribution and use in source and binary forms, with or without
3 * modification, are permitted provided that the following conditions are
4 * met :
5 *
6 * . Redistributions of source code must retain the above copyright
7 * notice, this list of conditions and the following disclaimer.
8 *
9 * . Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * . The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
25 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $Id: Output.java,v 1.10 2005/09/10 11:26:47 mat007 Exp $
29 */
30
31 package jtge.engine.io;
32
33 import jtge.engine.command.ICommand;
34
35 /***
36 * Handles the output logics.
37 * <p>
38 * It acts as the abstraction in the bridge pattern.
39 *
40 * @author Mathieu Champlon
41 * @version $Revision: 1.10 $ $Date: 2005/09/10 11:26:47 $
42 */
43 public class Output implements IOutput
44 {
45 private final IDisconnectionObserver observer;
46 private final IOutputImp output;
47
48 /***
49 * Create an output.
50 *
51 * @param observer the observer
52 * @param output the output implementation
53 */
54 public Output( final IDisconnectionObserver observer, final IOutputImp output )
55 {
56 if( observer == null )
57 throw new IllegalArgumentException( "argument 'observer' is null" );
58 if( output == null )
59 throw new IllegalArgumentException( "argument 'output' is null" );
60 this.observer = observer;
61 this.output = output;
62 }
63
64 /***
65 * {@inheritDoc}
66 */
67 public final void handle( final ICommand command )
68 {
69 output.write( command );
70 }
71
72 /***
73 * {@inheritDoc}
74 */
75 public final void close()
76 {
77 if( !isClosed() )
78 {
79 output.close();
80 observer.closed( this );
81 }
82 }
83
84 /***
85 * {@inheritDoc}
86 */
87 public final boolean isClosed()
88 {
89 return output.isClosed();
90 }
91 }