/*******************************************************************************
 * Copyright (c) 2007, 2008 IBM Corporation and Others
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Hisashi MIYASHITA - initial API and implementation
 *******************************************************************************/
package org.eclipse.actf.ai.internal.navigator;

import org.eclipse.actf.ai.navigator.extension.MetadataCacheCleanerExtension;
import org.eclipse.actf.ai.navigator.views.NavigatorTreeView;
import org.eclipse.actf.ai.tts.AbstractUIPluginForTTS;
import org.osgi.framework.BundleContext;

/**
 * The main plugin class to be used in the desktop.
 */
public class NavigatorPlugin extends AbstractUIPluginForTTS {

	public static final String ID = "org.eclipse.actf.ai.navigator";
	// The shared instance.
	private static NavigatorPlugin plugin;

	/**
	 * The constructor.
	 */
	public NavigatorPlugin() {
		plugin = this;
	}

	/**
	 * This method is called upon plug-in activation
	 */
	@Override
	public void start(BundleContext context) throws Exception {
		super.start(context);
	}

	/**
	 * This method is called when the plug-in is stopped
	 */
	@Override
	public void stop(BundleContext context) throws Exception {
		super.stop(context);
		plugin = null;
	}

	/**
	 * Returns the shared instance.
	 */
	public static NavigatorPlugin getDefault() {
		return plugin;
	}

	private NavigatorTreeView navigatorTreeView;

	/**
	 * To share the instance of the Navigator Tree View in this plug-in.
	 * 
	 * @param navigatorTreeView
	 *            An instance of the Navigator Tree View.
	 */
	public void setNavigatorTreeView(NavigatorTreeView navigatorTreeView) {
		this.navigatorTreeView = navigatorTreeView;
	}

	/**
	 * @return The shared instance of the Navigator Tree View.
	 */
	public NavigatorTreeView getNavigatorTreeView() {
		return navigatorTreeView;
	}

	/**
	 * Clear the memory cache of the metadata.
	 */
	public void clearMetadataCache() {
		MetadataCacheCleanerExtension.clearCache();
	}
}