001 /**
002 * ========================================
003 * JFreeReport : a free Java report library
004 * ========================================
005 *
006 * Project Info: http://reporting.pentaho.org/
007 *
008 * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
009 *
010 * This library is free software; you can redistribute it and/or modify it under the terms
011 * of the GNU Lesser General Public License as published by the Free Software Foundation;
012 * either version 2.1 of the License, or (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
015 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016 * See the GNU Lesser General Public License for more details.
017 *
018 * You should have received a copy of the GNU Lesser General Public License along with this
019 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020 * Boston, MA 02111-1307, USA.
021 *
022 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023 * in the United States and other countries.]
024 *
025 * ------------
026 * $Id: DefaultActionFactory.java,v 1.5 2007/06/10 15:54:22 taqua Exp $
027 * ------------
028 * (C) Copyright 2000-2005, by Object Refinery Limited.
029 * (C) Copyright 2005-2007, by Pentaho Corporation.
030 */
031
032 package org.jfree.report.modules.gui.swing.common;
033
034 import java.util.HashMap;
035 import java.util.Iterator;
036
037 import org.jfree.util.Configuration;
038 import org.jfree.util.Log;
039 import org.jfree.util.ObjectUtilities;
040
041 /**
042 * Creation-Date: 16.11.2006, 16:28:03
043 *
044 * @author Thomas Morgner
045 */
046 public class DefaultActionFactory implements ActionFactory
047 {
048 private static final String PREFIX =
049 "org.jfree.report.modules.gui.swing.actions.";
050
051 public DefaultActionFactory()
052 {
053 }
054
055 public ActionPlugin[] getActions(SwingGuiContext context, String category)
056 {
057 final Configuration configuration = context.getConfiguration();
058 final String prefix = PREFIX + category;
059 final Iterator keys = configuration.findPropertyKeys(prefix);
060 if (keys.hasNext() == false)
061 {
062 Log.debug("Returning : NO actions for " + category);
063 return new ActionPlugin[0];
064 }
065
066 final HashMap plugins = new HashMap();
067 while (keys.hasNext())
068 {
069 final String key = (String) keys.next();
070 final String base = key.substring(prefix.length());
071 if (isPluginKey(base) == false)
072 {
073 continue;
074 }
075
076 final String clazz = configuration.getConfigProperty(key);
077 final Object maybeActionPlugin = ObjectUtilities.loadAndInstantiate
078 (clazz, DefaultActionFactory.class, ActionPlugin.class);
079 if (maybeActionPlugin == null)
080 {
081 Log.debug("Error : " + category + ": " + clazz + " is no action plugin");
082 continue;
083 }
084
085 final ActionPlugin plugin = (ActionPlugin) maybeActionPlugin;
086 if (plugin.initialize(context) == false)
087 {
088 continue;
089 }
090 final String role = plugin.getRole();
091 if (role == null)
092 {
093 plugins.put(plugin, plugin);
094 }
095 else
096 {
097 final ActionPlugin otherPlugin = (ActionPlugin) plugins.get(role);
098 if (otherPlugin != null)
099 {
100 if (plugin.getRolePreference() > otherPlugin.getRolePreference())
101 {
102 plugins.put(role, plugin);
103 }
104 else
105 {
106 Log.debug("Loaded : " + category + ": " + clazz + ": Overridden by " + otherPlugin.getClass().getName());
107 }
108 }
109 else
110 {
111 plugins.put(role, plugin);
112 }
113 }
114 }
115
116 Log.debug("Returning : " + plugins.size() + " actions for " + category);
117
118 return (ActionPlugin[]) plugins.values().toArray
119 (new ActionPlugin[plugins.size()]);
120 }
121
122 private boolean isPluginKey(final String base)
123 {
124 if (base.length() < 1)
125 {
126 return false;
127 }
128 if (base.indexOf('.', 1) > 0)
129 {
130 return false;
131 }
132 return true;
133 }
134 }