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/*****************************************************************************
 * Copyright (c) 2011, 2014 CEA LIST, Christian W. Damus, 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:
 *  Remi Schnekenburger (CEA LIST) remi.schnekenburger@cea.fr - Initial API and implementation
 *  Christian W. Damus - bug 399859
 *  
 *****************************************************************************/
package org.eclipse.papyrus.uml.decoratormodel.properties;

import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.papyrus.infra.core.log.LogHelper;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;

/**
 * The activator class controls the plug-in life cycle
 */
public class Activator extends AbstractUIPlugin {

	// The plug-in ID
	public static final String PLUGIN_ID = "org.eclipse.papyrus.uml.decoratormodel.properties"; //$NON-NLS-1$

	// The shared instance
	private static Activator plugin;

	// The log for this plugin
	/**
	 * @since 3.0
	 */
	public static LogHelper log;

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

	@Override
	public void start(BundleContext context) throws Exception {
		super.start(context);
		plugin = this;
		log = new LogHelper(plugin);
	}

	@Override
	public void stop(BundleContext context) throws Exception {
		log = null;
		plugin = null;
		super.stop(context);
	}

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

	/**
	 * Returns the image at the given path from this plugin
	 *
	 * @param path
	 *            the path of the image to be displayed
	 * @return The Image at the given location, or null if it couldn't be found
	 */
	public Image getImage(String path) {
		return getImage(PLUGIN_ID, path);
	}

	/**
	 * Returns the image from the given image descriptor
	 *
	 * @param pluginId
	 *            The plugin in which the image is located
	 * @param path
	 *            The path to the image from the plugin
	 * @return
	 * 		The Image at the given location, or null if it couldn't be found
	 */
	public Image getImage(String pluginId, String path) {
		final ImageRegistry registry = getImageRegistry();
		String key = pluginId + "/" + path; //$NON-NLS-1$
		Image image = registry.get(key);
		if (image == null) {
			registry.put(key, AbstractUIPlugin.imageDescriptorFromPlugin(pluginId, path));
			image = registry.get(key);
		}
		return image;
	}

	public static IWorkbenchWindow getActiveWorkbenchWindow() {
		IWorkbenchWindow result = null;

		IWorkbench bench = PlatformUI.getWorkbench();
		if (bench != null) {
			result = bench.getActiveWorkbenchWindow();
			if (result == null) {
				IWorkbenchWindow[] allWindows = bench.getWorkbenchWindows();
				if (allWindows.length > 0) {
					result = allWindows[0];
				}
			}
		}

		return result;
	}

}

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