001/* ========================================================================
002 * JCommon : a free general purpose class library for the Java(tm) platform
003 * ========================================================================
004 *
005 * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
006 *
007 * Project Info:  http://www.jfree.org/jcommon/index.html
008 *
009 * This library is free software; you can redistribute it and/or modify it
010 * under the terms of the GNU Lesser General Public License as published by
011 * the Free Software Foundation; either version 2.1 of the License, or
012 * (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but
015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
017 * License for more details.
018 *
019 * You should have received a copy of the GNU Lesser General Public
020 * License along with this library; if not, write to the Free Software
021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
022 * USA.
023 *
024 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
025 * in the United States and other countries.]
026 *
027 * -------------
028 * BaseBoot.java
029 * -------------
030 * (C)opyright 2004, by Thomas Morgner and Contributors.
031 *
032 * Original Author:  Thomas Morgner;
033 * Contributor(s):   David Gilbert (for Object Refinery Limited);
034 *
035 * $Id: BaseBoot.java,v 1.11 2007/11/02 17:50:34 taqua Exp $
036 *
037 * Changes
038 * -------
039 * 07-Jun-2004 : Added source headers (DG);
040 *
041 */
042
043package org.jfree.base;
044
045import org.jfree.JCommon;
046import org.jfree.base.config.ModifiableConfiguration;
047import org.jfree.base.log.DefaultLogModule;
048import org.jfree.util.Configuration;
049import org.jfree.util.ObjectUtilities;
050
051/**
052 * The base boot class. This initializes the services provided by
053 * JCommon.
054 *
055 * @author Thomas Morgner
056 */
057public class BaseBoot extends AbstractBoot {
058
059    /**
060     * Singleton instance.
061     */
062    private static BaseBoot singleton;
063
064    /**
065     * The project info.
066     */
067    private BootableProjectInfo bootableProjectInfo;
068
069    /**
070     * Default constructor (private).
071     */
072    private BaseBoot() {
073        this.bootableProjectInfo = JCommon.INFO;
074    }
075
076    /**
077     * Returns the global configuration as modifiable configuration reference.
078     *
079     * @return the global configuration
080     */
081    public static ModifiableConfiguration getConfiguration() {
082        return (ModifiableConfiguration) getInstance().getGlobalConfig();
083    }
084
085    /**
086     * Returns the global configuration for JFreeReport.
087     * <p>
088     * In the current implementation, the configuration has no properties defined, but
089     * references a parent configuration that:</p> 
090     * <ul> <li>copies across all the
091     * <code>System</code> properties to use as report configuration properties (obviously
092     * the majority of them will not apply to reports);</li> <li>itself references a parent
093     * configuration that reads its properties from a file <code>jfreereport.properties</code>.
094     * </ul>
095     *
096     * @return the global configuration.
097     */
098    protected synchronized Configuration loadConfiguration() {
099        return createDefaultHierarchicalConfiguration
100            ("/org/jfree/base/jcommon.properties",
101             "/jcommon.properties", true, BaseBoot.class);
102    }
103
104    /**
105     * Returns the boot instance.
106     *
107     * @return The boot instance.
108     */
109    public static synchronized AbstractBoot getInstance() {
110        if (singleton == null) {
111            singleton = new BaseBoot();
112        }
113        return singleton;
114    }
115
116    /**
117     * Performs the boot process.
118     */
119    protected void performBoot() {
120        // configure the classloader from the properties-file.
121        ObjectUtilities.setClassLoaderSource
122                (getConfiguration().getConfigProperty("org.jfree.ClassLoader"));
123
124        getPackageManager().addModule(DefaultLogModule.class.getName());
125        getPackageManager().load("org.jfree.jcommon.modules.");
126        getPackageManager().initializeModules();
127    }
128
129    /**
130     * Returns the project info.
131     *
132     * @return The project info.
133     */
134    protected BootableProjectInfo getProjectInfo() {
135        return this.bootableProjectInfo;
136    }
137}