/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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: 

*

*/

package com.nokia.carbide.internal.cpp.epoc.engine.model;

import com.nokia.carbide.internal.api.cpp.epoc.engine.dom.IASTNode;

import com.nokia.carbide.internal.api.cpp.epoc.engine.dom.ITranslationUnitListener;

import com.nokia.cpp.internal.api.utils.core.*;

/**

 * Listen to unauthorized external changes to the TU

 */

class TranslationUnitListener implements ITranslationUnitListener {

	private boolean changesAllowed;

	public void allowChanges(boolean allowed) {

		Check.checkState(allowed != changesAllowed);

		changesAllowed = allowed;

	}

	/* (non-Javadoc)

	 * @see com.nokia.carbide.internal.api.cpp.epoc.engine.dom.ITranslationUnitListener#changedNode(com.nokia.carbide.internal.api.cpp.epoc.engine.dom.IASTNode)

	 */

	public void changedNode(IASTNode node) {

		if (!changesAllowed)

			throw new IllegalStateException("illegal change to translation unit outside model or view"); //$NON-NLS-1$

	}

}