/*

* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

* Wrapper for a trace view extension

*

*/

package com.nokia.tracebuilder.view;

import java.util.Iterator;

import com.nokia.tracebuilder.engine.TraceViewExtension;

import com.nokia.tracebuilder.model.TraceModelExtensionUpdateListener;

/**

 * Wrapper for a trace view extension

 * 

 */

final class TraceViewExtensionWrapper extends ListWrapper implements

		TraceModelExtensionUpdateListener {

	/**

	 * The wrapped extension

	 */

	private TraceViewExtension extension;

	/**

	 * Creates a new extension wrapper.

	 * 

	 * @param extension

	 *            the extension to be shown in the view

	 * @param parent

	 *            parent wrapper

	 * @param updater

	 *            the update notifier

	 */

	TraceViewExtensionWrapper(TraceViewExtension extension, WrapperBase parent,

			WrapperUpdater updater) {

		super(parent, updater);

		this.extension = extension;

		extension.addUpdateListener(this);

		extension.setViewReference(this);

		createChildren();

	}

	/**

	 * Returns the wrapped extension

	 * 

	 * @return the extension

	 */

	TraceViewExtension getExtension() {

		return extension;

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see com.nokia.tracebuilder.view.ListWrapper#delete()

	 */

	@Override

	void delete() {

		extension.setViewReference(null);

		extension.removeUpdateListener(this);

		extension = null;

		super.delete();

	}

	/**

	 * Creates the child wrappers

	 */

	private void createChildren() {

		Iterator<?> itr = extension.getChildren();

		while (itr.hasNext()) {

			ObjectWrapper wrapper = new ObjectWrapper(itr.next(), this,

					getUpdater());

			add(wrapper);

		}

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see com.nokia.tracebuilder.model.TraceModelExtensionUpdateListener#extensionUpdated()

	 */

	public void extensionUpdated() {

		clear();

		createChildren();

		getUpdater().update(

				((TraceObjectWrapper) getParent()).updateExtension(extension));

	}

}