/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.felix.shell.gui.impl;
import java.awt.BorderLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.event.EventListenerList;
import org.apache.felix.shell.gui.Plugin;
import org.osgi.framework.*;
public class Activator implements BundleActivator
{
private BundleContext m_context = null;
private List m_pluginList = null;
private EventListenerList m_listenerList = null;
private JFrame m_frame = null;
public static final String PLUGIN_LIST_PROPERTY = "pluginList";
public Activator()
{
m_pluginList = new ArrayList();
m_listenerList = new EventListenerList();
}
public synchronized int getPluginCount()
{
if (m_pluginList == null)
{
return 0;
}
return m_pluginList.size();
}
public synchronized Plugin getPlugin(int i)
{
if ((i < 0) || (i >= getPluginCount()))
{
return null;
}
return (Plugin) m_pluginList.get(i);
}
public synchronized boolean pluginExists(Plugin plugin)
{
for (int i = 0; i < m_pluginList.size(); i++)
{
if (m_pluginList.get(i) == plugin)
{
return true;
}
}
return false;
}
//
// Bundle activator methods.
//
public void start(BundleContext context)
{
m_context = context;
// Listen for factory service events.
ServiceListener sl = new ServiceListener() {
public void serviceChanged(ServiceEvent event)
{
ServiceReference ref = event.getServiceReference();
Object svcObj = m_context.getService(ref);
if ((event.getType() == ServiceEvent.REGISTERED) &&
(svcObj instanceof Plugin))
{
synchronized (Activator.this)
{
// Check for duplicates.
if (!m_pluginList.contains(svcObj))
{
m_pluginList.add(svcObj);
firePropertyChangedEvent(
PLUGIN_LIST_PROPERTY, null, null);
}
}
}
else if ((event.getType() == ServiceEvent.UNREGISTERING) &&
(svcObj instanceof Plugin))
{
synchronized (Activator.this)
{
m_pluginList.remove(svcObj);
firePropertyChangedEvent(
PLUGIN_LIST_PROPERTY, null, null);
}
}
else
{
m_context.ungetService(ref);
}
}
};
try
{
m_context.addServiceListener(sl,
"(objectClass="
+ org.apache.felix.shell.gui.Plugin.class.getName()
+ ")");
}
catch (InvalidSyntaxException ex)
{
System.err.println("ShellGuiActivator: Cannot add service listener.");
System.err.println("ShellGuiActivator: " + ex);
}
// Now try to manually initialize the plugin list
// since some might already be available.
initializePlugins();
// Create and display the frame.
if (m_frame == null)
{
ShellPanel panel = new ShellPanel(this);
m_frame = new JFrame("Felix GUI Shell");
m_frame.getContentPane().setLayout(new BorderLayout());
m_frame.getContentPane().add(panel);
m_frame.pack();
m_frame.setSize(700, 400);
m_frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
m_frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent event)
{
if (m_context.getBundle().getState() == Bundle.ACTIVE)
{
try
{
m_context.getBundle().stop();
}
catch (Exception ex)
{
System.err.println("ShellGuiActivator: " + ex);
}
}
}
});
}
m_frame.setVisible(true);
}
private synchronized void initializePlugins()
{
try
{
// Get all model services.
ServiceReference refs[] = m_context.getServiceReferences(
org.apache.felix.shell.gui.Plugin.class.getName(), null);
if (refs != null)
{
// Add model services to list, ignore duplicates.
for (int i = 0; i < refs.length; i++)
{
Object svcObj = m_context.getService(refs[i]);
if (!m_pluginList.contains(svcObj))
{
m_pluginList.add(svcObj);
}
}
firePropertyChangedEvent(
PLUGIN_LIST_PROPERTY, null, null);
}
}
catch (Exception ex)
{
System.err.println("ShellGuiActivator: Error initializing model list.");
System.err.println("ShellGuiActivator: " + ex);
ex.printStackTrace();
}
}
public void stop(BundleContext context)
{
if (m_frame != null)
{
m_frame.setVisible(false);
m_frame.dispose();
m_frame = null;
}
}
//
// Event methods.
//
public void addPropertyChangeListener(PropertyChangeListener l)
{
m_listenerList.add(PropertyChangeListener.class, l);
}
public void removeFooListener(PropertyChangeListener l)
{
m_listenerList.remove(PropertyChangeListener.class, l);
}
protected void firePropertyChangedEvent(String name, Object oldValue, Object newValue)
{
PropertyChangeEvent event = null;
// Guaranteed to return a non-null array
Object[] listeners = m_listenerList.getListenerList();
// Process the listeners last to first, notifying
// those that are interested in this event
for (int i = listeners.length - 2; i >= 0; i -= 2)
{
if (listeners[i] == PropertyChangeListener.class)
{
// Lazily create the event:
if (event == null)
{
event = new PropertyChangeEvent(this, name, oldValue, newValue);
}
((PropertyChangeListener) listeners[i + 1]).propertyChange(event);
}
}
}
}