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Java > Open Source Codes > org > jfree > base > modules > SubSystem


1 /* ========================================================================
2  * JCommon : a free general purpose class library for the Java(tm) platform
3  * ========================================================================
4  *
5  * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
6  *
7  * Project Info: http://www.jfree.org/jcommon/index.html
8  *
9  * This library is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU Lesser General Public License as published by
11  * the Free Software Foundation; either version 2.1 of the License, or
12  * (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful, but
15  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17  * License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
22  * USA.
23  *
24  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
25  * in the United States and other countries.]
26  *
27  * --------------
28  * SubSystem.java
29  * --------------
30  * (C)opyright 2003, 2004, by Thomas Morgner and Contributors.
31  *
32  * Original Author: Thomas Morgner;
33  * Contributor(s): David Gilbert (for Object Refinery Limited);
34  *
35  * $Id: SubSystem.java,v 1.5 2005/10/18 13:14:50 mungady Exp $
36  *
37  * Changes
38  * -------
39  * 10-Jul-2003 : Initial version
40  * 07-Jun-2004 : Added JCommon header (DG);
41  *
42  */
43
44 package org.jfree.base.modules;
45
46 import org.jfree.util.Configuration;
47 import org.jfree.util.ExtendedConfiguration;
48
49 /**
50  * A sub-system holds a separate collection of modules.
51  * <p>
52  * On a simple level, subsystems can be just libraries.
53  * Libraries offering services need a controlled way to
54  * initialize these services before dependent code starts
55  * using the library. This can be achived by embedding the
56  * library services into an own subsystem.
57  *
58  * @author Thomas Morgner
59  */
60 public interface SubSystem {
61
62     /**
63      * Returns the global configuration.
64      *
65      * @return The global configuration.
66      */
67     public Configuration getGlobalConfig();
68
69     /**
70      * Returns the global configuration as ExtendedConfiguration instance.
71      *
72      * @return the extended configuration.
73      */
74     public ExtendedConfiguration getExtendedConfig ();
75
76     /**
77      * Returns the package manager.
78      *
79      * @return The package manager.
80      */
81     public PackageManager getPackageManager();
82
83 }
84
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