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/*******************************************************************************
* Copyright (c) 2006, 2007 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.debug.internal.ui.viewers.model.provisional;
/**
* Used to save and restore viewer selection/expansion state. A memento
* provider adapter should be available from a viewer input element
* in order to support viewer state save/restore.
*
* @since 3.3
*/
public interface IElementMementoProvider {
/**
* Creates and stores a mementos for the elements specified in the requests.
* A request should be cancelled if a memento is not supported for the
* specified element or context.
*
* @param requests specifies elements and provides memento stores
*/
public void encodeElements(IElementMementoRequest[] requests);
/**
* Determines whether mementos represent associated elements specified in the requests.
*
* @param requests specifies each element and previously created memento
*/
public void compareElements(IElementCompareRequest[] requests);
}
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