KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > jfree > base > BaseBoot


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  * BaseBoot.java
29  * -------------
30  * (C)opyright 2004, by Thomas Morgner and Contributors.
31  *
32  * Original Author: Thomas Morgner;
33  * Contributor(s): David Gilbert (for Object Refinery Limited);
34  *
35  * $Id: BaseBoot.java,v 1.9 2006/02/19 21:10:47 taqua Exp $
36  *
37  * Changes
38  * -------
39  * 07-Jun-2004 : Added source headers (DG);
40  *
41  */
42
43 package org.jfree.base;
44
45 import org.jfree.JCommon;
46 import org.jfree.base.config.ModifiableConfiguration;
47 import org.jfree.base.log.DefaultLogModule;
48 import org.jfree.util.Configuration;
49 import org.jfree.util.ObjectUtilities;
50
51 /**
52  * The base boot class. This initializes the services provided by
53  * JCommon.
54  *
55  * @author Thomas Morgner
56  */
57 public class BaseBoot extends AbstractBoot {
58
59     /**
60      * Singleton instance.
61      */
62     private static BaseBoot singleton;
63
64     /**
65      * The project info.
66      */
67     private BootableProjectInfo bootableProjectInfo;
68
69     /**
70      * Default constructor (private).
71      */
72     private BaseBoot() {
73         this.bootableProjectInfo = JCommon.INFO;
74     }
75
76     /**
77      * Returns the global configuration as modifiable configuration reference.
78      *
79      * @return the global configuration
80      */
81     public static ModifiableConfiguration getConfiguration() {
82         return (ModifiableConfiguration) getInstance().getGlobalConfig();
83     }
84
85     /**
86      * Returns the global configuration for JFreeReport.
87      * <p/>
88      * In the current implementation, the configuration has no properties defined, but
89      * references a parent configuration that: <ul> <li>copies across all the
90      * <code>System</code> properties to use as report configuration properties (obviously
91      * the majority of them will not apply to reports);</li> <li>itself references a parent
92      * configuration that reads its properties from a file <code>jfreereport.properties</code>.
93      * </ul>
94      *
95      * @return the global configuration.
96      */
97     protected synchronized Configuration loadConfiguration() {
98         return createDefaultHierarchicalConfiguration
99             ("/org/jfree/base/jcommon.properties",
100              "/jcommon.properties", true);
101     }
102
103     /**
104      * Returns the boot instance.
105      *
106      * @return The boot instance.
107      */
108     public static synchronized AbstractBoot getInstance() {
109         if (singleton == null) {
110             singleton = new BaseBoot();
111         }
112         return singleton;
113     }
114
115     /**
116      * Performs the boot process.
117      */
118     protected void performBoot() {
119         // configure the classloader from the properties-file.
120 ObjectUtilities.setClassLoaderSource
121                 (getConfiguration().getConfigProperty("org.jfree.ClassLoader"));
122
123         getPackageManager().addModule(DefaultLogModule.class.getName());
124         getPackageManager().load("org.jfree.jcommon.modules.");
125         getPackageManager().initializeModules();
126     }
127
128     /**
129      * Returns the project info.
130      *
131      * @return The project info.
132      */
133     protected BootableProjectInfo getProjectInfo() {
134         return this.bootableProjectInfo;
135     }
136 }
137
Popular Tags