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Java > Open Source Codes > de > nava > informa > utils > manager > memory > Channel


1 //
2 // Informa -- RSS Library for Java
3 // Copyright (c) 2002 by Niko Schmuck
4 //
5 // Niko Schmuck
6 // http://sourceforge.net/projects/informa
7 // mailto:niko_schmuck@users.sourceforge.net
8 //
9 // This library is free software.
10 //
11 // You may redistribute it and/or modify it under the terms of the GNU
12 // Lesser General Public License as published by the Free Software Foundation.
13 //
14 // Version 2.1 of the license should be included with this distribution in
15 // the file LICENSE. If the license is not included with this distribution,
16 // you may find a copy at the FSF web site at 'www.gnu.org' or 'www.fsf.org',
17 // or you may write to the Free Software Foundation, 675 Mass Ave, Cambridge,
18 // MA 02139 USA.
19 //
20 // This library is distributed in the hope that it will be useful,
21 // but WITHOUT ANY WARRANTY; without even the implied waranty of
22 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 // Lesser General Public License for more details.
24 //
25 // $Id: Channel.java,v 1.1 2004/08/23 14:39:08 spyromus Exp $
26 //
27
28 package de.nava.informa.utils.manager.memory;
29
30 import de.nava.informa.core.ChannelGroupIF;
31
32 import java.net.URL JavaDoc;
33 import java.util.ArrayList JavaDoc;
34 import java.util.List JavaDoc;
35
36 /**
37  * Local implementation of <code>ChannelIF</code>.
38  *
39  * @author Aleksey Gureev (spyromus@noizeramp.com)
40  */
41 public class Channel extends de.nava.informa.impl.basic.Channel {
42   private List JavaDoc groups = new ArrayList JavaDoc();
43
44   /**
45    * Creates channel object.
46    *
47    * @param id ID of the channel.
48    * @param title title of the channel.
49    * @param location URL of resource location.
50    */
51   public Channel(long id, String JavaDoc title, URL JavaDoc location) {
52     super(title);
53     setId(id);
54     setLocation(location);
55   }
56
57   /**
58    * Adds parent group to the list when channel is assigned to the new group.
59    *
60    * @param group group to add.
61    */
62   public final void addParentGroup(ChannelGroupIF group) {
63     synchronized (group) {
64       if (!groups.contains(group)) {
65         groups.add(group);
66       }
67     }
68   }
69
70   /**
71    * Removes parent group from the list when channel is unassigned from it.
72    *
73    * @param group group to remove.
74    */
75   public final void removeParentGroup(ChannelGroupIF group) {
76     synchronized (group) {
77       groups.remove(group);
78     }
79   }
80
81   /**
82    * Returns the list of parent groups.
83    *
84    * @return list of groups.
85    */
86   public final ChannelGroupIF[] getParentGroups() {
87     return (ChannelGroupIF[]) groups.toArray(new ChannelGroupIF[0]);
88   }
89 }
90
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