EDIT

// $Id$

/**

* Copyright (C) 2007 EDIT

* European Distributed Institute of Taxonomy 

* http://www.e-taxonomy.eu

* 

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.taxeditor.navigation;

import org.apache.log4j.Logger;

import org.eclipse.core.commands.operations.IUndoContext;

import org.eclipse.core.commands.operations.UndoContext;

import org.eclipse.core.runtime.IAdapterFactory;

/**

 * <p>WorkbenchUndoContextAdapterFactory class.</p>

 *

 * @author p.ciardelli

 * @created 04.06.2009

 * @version 1.0

 */

public class WorkbenchUndoContextAdapterFactory implements IAdapterFactory {

	private static final Logger logger = Logger

			.getLogger(WorkbenchUndoContextAdapterFactory.class);

	private UndoContext defaultUndoContext;

	private static final Class[] ADAPTER_LIST = new Class[] { IUndoContext.class };

	/* (non-Javadoc)

	 * @see org.eclipse.core.runtime.IAdapterFactory#getAdapter(java.lang.Object, java.lang.Class)

	 */

	/** {@inheritDoc} */

	public Object getAdapter(Object adaptableObject, Class adapterType) {

		if (IUndoContext.class.equals(adapterType)) {

			return NavigationUtil.getWorkbenchUndoContext();

		}

		return null;

	}

	/**

	 * @return

	 */

	private Object getDefaultUndoContext() {

		if (defaultUndoContext == null) {

			defaultUndoContext = new UndoContext();

		}

		return defaultUndoContext;

	}

	/* (non-Javadoc)

	 * @see org.eclipse.core.runtime.IAdapterFactory#getAdapterList()

	 */

	/**

	 * <p>getAdapterList</p>

	 *

	 * @return an array of {@link java.lang.Class} objects.

	 */

	public Class[] getAdapterList() {

		return ADAPTER_LIST;

	}

}