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Java > Open Source Codes > org > jboss > aspects > patterns > observable > Observer


1 /*
2   * JBoss, Home of Professional Open Source
3   * Copyright 2005, JBoss Inc., and individual contributors as indicated
4   * by the @authors tag. See the copyright.txt in the distribution for a
5   * full listing of individual contributors.
6   *
7   * This is free software; you can redistribute it and/or modify it
8   * under the terms of the GNU Lesser General Public License as
9   * published by the Free Software Foundation; either version 2.1 of
10   * the License, or (at your option) any later version.
11   *
12   * This software 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 GNU
15   * Lesser General Public License for more details.
16   *
17   * You should have received a copy of the GNU Lesser General Public
18   * License along with this software; if not, write to the Free
19   * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20   * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21   */
22 package org.jboss.aspects.patterns.observable;
23
24 /**
25  * An Observer. Implement this interface to register
26  * for subject changes.
27  *
28  * @author <a HREF="adrian@jboss.com">Adrian Brock</a>
29  * @version $Revision: 37406 $
30  */
31 public interface Observer
32 {
33    /**
34     * Notification that a subject has changed
35     *
36     * @param subject the subject
37     */
38    void fireChange(Subject subject);
39 }
40
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