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: UserChannelManager.java,v 1.4 2005/08/29 17:41:32 mat007 Exp $
29 */
30
31 package jtge.engine.security;
32
33 import java.util.Iterator;
34 import java.util.Vector;
35 import jtge.engine.handler.IConsumer;
36 import jtge.engine.io.IChannelObserver;
37 import jtge.engine.io.IInput;
38 import jtge.engine.io.IOutput;
39 import jtge.engine.user.IUser;
40
41 /***
42 * Maintains an association between a channel and a user.
43 *
44 * @author Mathieu Champlon
45 * @version $Revision: 1.4 $ $Date: 2005/08/29 17:41:32 $
46 */
47 public class UserChannelManager implements IUserManager, IChannelObserver
48 {
49 private final Vector inputs;
50 private final Vector outputs;
51 private final Vector users;
52 private final Vector observers;
53
54 /***
55 * Create a user channel manager.
56 */
57 public UserChannelManager()
58 {
59 inputs = new Vector();
60 outputs = new Vector();
61 users = new Vector();
62 observers = new Vector();
63 }
64
65 /***
66 * Register a login observer.
67 *
68 * @param observer the observer to register
69 */
70 public final void register( final ILoginObserver observer )
71 {
72 if( observer != null )
73 observers.add( observer );
74 }
75
76 private void login( final IUser user, final IConsumer consumer )
77 {
78 final Iterator iterator = observers.iterator();
79 while( iterator.hasNext() )
80 ((ILoginObserver)iterator.next()).login( user, consumer );
81 }
82
83 private void logout( final IUser user )
84 {
85 final Iterator iterator = observers.iterator();
86 while( iterator.hasNext() )
87 ((ILoginObserver)iterator.next()).logout( user );
88 }
89
90 /***
91 * {@inheritDoc}
92 */
93 public final void register( final IInput input, final IUser user )
94 {
95 final int index = inputs.indexOf( input );
96 if( index != -1 )
97 {
98 users.set( index, user );
99 login( user, (IOutput)outputs.elementAt( index ) );
100 }
101 }
102
103 /***
104 * {@inheritDoc}
105 */
106 public final void unregister( final IUser user )
107 {
108 throw new UnsupportedOperationException();
109 }
110
111 /***
112 * {@inheritDoc}
113 */
114 public final void connected( final IInput input, final IOutput output )
115 {
116 inputs.add( input );
117 outputs.add( output );
118 users.add( null );
119 }
120
121 /***
122 * {@inheritDoc}
123 */
124 public final void disconnected( final IInput input, final IOutput output )
125 {
126 final int index = inputs.indexOf( input );
127 if( index != -1 )
128 {
129 inputs.remove( index );
130 outputs.remove( index );
131 final IUser user = (IUser)users.remove( index );
132 if( user != null )
133 logout( user );
134 }
135 }
136 }