/*******************************************************************************
 * Copyright (c) 2005-2011
 * University of Augsburg, Germany <www.ds-lab.org>
 *
 * 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:
 *    Christian Seitz, Programming distributed Systems Lab, University of Augsburg - initial API and implementation
 *    Christian Saad, Programming distributed Systems Lab, University of Augsburg - smaller changes
 *******************************************************************************/

package org.eclipse.jwt.we.plugins.doc;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;


/**
 * The activator class controls the plug-in life cycle
 * 
 * @author Christian Seitz (chr.seitz@gmx.de), Programming distributed Systems Lab,
 *         University of Augsburg, Germany, www.ds-lab.org.
 */
public class Activator
		extends AbstractUIPlugin
{

	// The plug-in ID
	public static final String PLUGIN_ID = "org.eclipse.jwt.we.plugins.doc.docplugin"; //$NON-NLS-1$

	// The shared instance
	private static Activator plugin;


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


	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#start(org.osgi.framework.BundleContext)
	 */
	public void start(BundleContext context) throws Exception
	{
		super.start(context);
		plugin = this;
	}


	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#stop(org.osgi.framework.BundleContext)
	 */
	public void stop(BundleContext context) throws Exception
	{
		plugin = null;
		super.stop(context);
	}


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


	/**
	 * Returns an image descriptor for the image file at the given plug-in relative path
	 * 
	 * @param path
	 *            the path
	 * @return the image descriptor
	 */
	public static ImageDescriptor getImageDescriptor(String path)
	{
		return imageDescriptorFromPlugin(PLUGIN_ID, path);

	}
	
	/**
	 * @return The shared instance.
	 */
	public static Activator getInstance()
	{
		return plugin;
	}

	/**
	 * @return The ID of this plugin.
	 */
	public static String getId()
	{
		if (getInstance() == null)
		{
			return Activator.class.getPackage().getName();
		}
		return getInstance().getBundle().getSymbolicName();
	}
}
