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Java > Open Source Codes > org > eclipse > debug > internal > ui > viewers > model > provisional > IElementMementoProvider


1 /*******************************************************************************
2  * Copyright (c) 2006, 2007 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * IBM Corporation - initial API and implementation
10  *******************************************************************************/
11 package org.eclipse.debug.internal.ui.viewers.model.provisional;
12
13 /**
14  * Used to save and restore viewer selection/expansion state. A memento
15  * provider adapter should be available from a viewer input element
16  * in order to support viewer state save/restore.
17  *
18  * @since 3.3
19  */
20 public interface IElementMementoProvider {
21     
22     /**
23      * Creates and stores a mementos for the elements specified in the requests.
24      * A request should be cancelled if a memento is not supported for the
25      * specified element or context.
26      *
27      * @param requests specifies elements and provides memento stores
28      */
29     public void encodeElements(IElementMementoRequest[] requests);
30     
31     /**
32      * Determines whether mementos represent associated elements specified in the requests.
33      *
34      * @param requests specifies each element and previously created memento
35      */
36     public void compareElements(IElementCompareRequest[] requests);
37
38 }
39
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