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: LoginHandler.java,v 1.7 2005/09/10 23:59:42 mat007 Exp $
29 */
30
31 package jtge.engine.security;
32
33 import jtge.engine.command.ICommand;
34 import jtge.engine.command.IFilter;
35 import jtge.engine.command.ReverseFilter;
36 import jtge.engine.command.TypeFilter;
37 import jtge.engine.data.Context;
38 import jtge.engine.handler.Executor;
39 import jtge.engine.handler.Filter;
40 import jtge.engine.handler.IConsumer;
41 import jtge.engine.io.IInput;
42 import jtge.engine.user.IUser;
43
44 /***
45 * Implements a security handler to handle login commands and logout events for a given input.
46 * <p>
47 * TODO abtract dispatching based on a filter
48 *
49 * @author Mathieu Champlon
50 * @version $Revision: 1.7 $ $Date: 2005/09/10 23:59:42 $
51 */
52 public class LoginHandler implements IConsumer, ILoginView
53 {
54 private final IInput input;
55 private final IUserManager manager;
56 private final IUserHandlerFactory factory;
57 private final IFilter filter;
58 private IConsumer consumer;
59
60 /***
61 * Create a login handler.
62 *
63 * @param input the input to watch
64 * @param manager the user manager
65 * @param factory the user handler factory
66 */
67 public LoginHandler( final IInput input, final IUserManager manager, final IUserHandlerFactory factory )
68 {
69 if( input == null )
70 throw new IllegalArgumentException( "argument 'input' is null" );
71 if( manager == null )
72 throw new IllegalArgumentException( "argument 'manager' is null" );
73 if( factory == null )
74 throw new IllegalArgumentException( "argument 'factory' is null" );
75 this.input = input;
76 this.manager = manager;
77 this.factory = factory;
78 filter = new TypeFilter( ILoginCommand.class );
79 final Context context = new Context();
80 context.put( ILoginView.class, this );
81 consumer = new Filter( new Executor( context ), filter );
82 }
83
84 /***
85 * {@inheritDoc}
86 */
87 public final void handle( final ICommand command )
88 {
89 consumer.handle( command );
90 }
91
92 /***
93 * {@inheritDoc}
94 */
95 public final void login( final IUser user )
96 {
97 manager.register( input, user );
98 consumer = new Filter( factory.create( user ), new ReverseFilter( filter ) );
99 }
100
101 /***
102 * {@inheritDoc}
103 */
104 public final void logout( final IUser user )
105 {
106
107 }
108 }