xpluginmanager.java

XBrowser是一个完全免费并且开源的Web浏览器

/****************************************************************
*              XBrowser  -  eXtended web Browser                *
*                                                               *
*           Copyright (c) 2000-2001  Armond Avanes              *
*     Refer to ReadMe & License files for more information      *
*                                                               *
*                                                               *
*                      By: Armond Avanes                        *
*       [e-mail]     &    [e-mail]        *
*                http://xbrowser.sourceforge.net/               *
*****************************************************************/
package xbrowser.plugin;

import java.util.*;

import xbrowser.*;
import xbrowser.util.*;
import xbrowser.plugin.event.*;

public final class XPluginManager
{
	public void load()
	{
		try
		{
		String file_name = XProjectConstants.CONFIG_DIR+XRepository.getConfiguration().getPluginFileName();

			XRepository.getConfiguration().getActivePluginSerializer().getSerializer().importPlugins(file_name, this);
		}
		catch( Exception e )
		{
			XRepository.getLogger().error(this, "An error occured on loading the plugins list!");
			XRepository.getLogger().error(this, e);

			plugins.clear();
			//save();
		}
	}

	public void save()
	{
		try
		{
		String file_name = XProjectConstants.CONFIG_DIR+XRepository.getConfiguration().getPluginFileName();

			XRepository.getConfiguration().getActivePluginSerializer().getSerializer().exportPlugins(file_name, this);
		}
		catch( Exception e )
		{
			XRepository.getLogger().warning(this, "An error occured while saving the plugins list!");
			XRepository.getLogger().warning(this, e);
		}
	}

	public void addPlugin(XPluginObject plugin)
	{
		if( plugins.contains(plugin) )
			return;

		plugins.add(plugin);
		plugin.init();

		for( int i=0; i<pluginListeners.size(); i++ )
			((XPluginListener)pluginListeners.get(i)).pluginAdded(plugin);
	}

	public void removePlugin(XPluginObject plugin)
	{
		if( !plugins.contains(plugin) )
			return;

		plugin.stop();
		plugin.destroy();
		plugins.remove(plugin);

		for( int i=0; i<pluginListeners.size(); i++ )
			((XPluginListener)pluginListeners.get(i)).pluginRemoved(plugin);
	}

	public Iterator getPlugins()
	{
		return plugins.iterator();
	}

	public void addPluginListener(XPluginListener listener)
	{
		if( !pluginListeners.contains(listener) )
		{
			pluginListeners.add(listener);
			updateListener(listener);
		}
	}

	public void removePluginListener(XPluginListener listener)
	{
		pluginListeners.remove(listener);
	}

	public void destroyAllPlugins()
	{
	Iterator it = plugins.iterator();
	XPluginObject plugin;

		while( it.hasNext() )
		{
			plugin = (XPluginObject)it.next();
			plugin.stop();
			plugin.destroy();
		}
	}

	public void checkAutoStartPlugins()
	{
	Iterator it = plugins.iterator();
	XPluginObject plugin;

		while( it.hasNext() )
		{
			plugin = (XPluginObject)it.next();
			if( plugin.isAutoStart() )
				plugin.start();
		}
	}

	private void updateListener(XPluginListener listener)
	{
	Iterator it = plugins.iterator();

		while( it.hasNext() )
			listener.pluginAdded( (XPluginObject)it.next() );
	}

// Attributes:
    private LinkedList pluginListeners = new LinkedList();
    private LinkedList plugins = new LinkedList();
}