/*******************************************************************************
 * Copyright (c) 2010, 2011 Obeo.
 * 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:
 *     Obeo - initial API and implementation
 *******************************************************************************/
package org.eclipse.mylyn.docs.intent.client.ui.ide;

import org.eclipse.core.resources.IWorkspace;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.mylyn.docs.intent.client.ui.ide.builder.IntentProjectListener;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;

/**
 * The activator class controls the plug-in life cycle.
 * 
 * @author <a href="mailto:alex.lagarde@obeo.fr">Alex Lagarde</a>
 */
public class Activator extends AbstractUIPlugin {

	/**
	 * The plugin ID.
	 */
	public static final String PLUGIN_ID = "org.eclipse.mylyn.docs.intent.client.ui.ide"; //$NON-NLS-1$

	/**
	 * The registered {@link IntentProjectListener}, in charge of handling the workspace's Intent projects.
	 */
	private static IntentProjectListener intentProjectListener;

	/**
	 * The shared instance of this plugin.
	 */
	private static Activator plugin;

	/**
	 * The constructor.
	 */
	public Activator() {
	}

	/**
	 * {@inheritDoc}
	 * 
	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#start(org.osgi.framework.BundleContext)
	 */
	public void start(BundleContext context) throws Exception {
		super.start(context);
		plugin = this;
		intentProjectListener = new IntentProjectListener();
		IWorkspace workspace = ResourcesPlugin.getWorkspace();
		workspace.addResourceChangeListener(intentProjectListener);
	}

	/**
	 * {@inheritDoc}
	 * 
	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#stop(org.osgi.framework.BundleContext)
	 */
	public void stop(BundleContext context) throws Exception {
		IWorkspace workspace = ResourcesPlugin.getWorkspace();
		workspace.removeResourceChangeListener(intentProjectListener);

		plugin = null;
		super.stop(context);
	}

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

	/**
	 * Returns the {@link IntentProjectListener} used to handle the lifecycle of Intent workspace projects.
	 * 
	 * @return the {@link IntentProjectListener} used to handle the lifecycle of Intent workspace projects
	 */
	public IntentProjectListener getIntentProjectListener() {
		return intentProjectListener;
	}

}