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/*******************************************************************************
* Copyright (c) 2000, 2011 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.compare.structuremergeviewer;
import org.eclipse.compare.ITypedElement;
/**
* An <code>IDiffElement</code> is used in the <code>DiffTreeViewer</code>
* to display the kind of change detected as the result of a two-way or three-way compare.
* <p>
* The base interface <code>ITypedElement</code> provides a name, a type, and an image.
* <code>IDiffElement</code> adds API for maintaining a parent relationship.
* <p>
* <code>DiffTreeViewer</code> works on a tree of <code>IDiffElements</code>.
* Leaf elements must implement the
* <code>IDiffElement</code> interface, inner nodes the <code>IDiffContainer</code> interface.
* <p>
* <code>IDiffElement</code>s are typically created as the result of performing
* a compare with the <code>Differencer</code>.
* <p>
* Clients may implement this interface, or use one of the standard implementations,
* <code>DiffElement</code>, <code>DiffContainer</code>, or <code>DiffNode</code>.
*
* @see DiffTreeViewer
* @see DiffElement
* @see DiffContainer
* @see DiffNode
*/
public interface IDiffElement extends ITypedElement {
/**
* Returns the kind of difference as defined in <code>Differencer</code>.
*
* @return the kind of difference as defined in <code>Differencer</code>
*/
int getKind();
/**
* Returns the parent of this element.
* If the object is the root of a hierarchy <code>null</code> is returned.
*
* @return the parent of this element, or <code>null</code> if the element has no parent
*/
IDiffContainer getParent();
/**
* Sets the parent of this element.
*
* @param parent the new parent of this element, or <code>null</code> if this
* element is to have no parent
*/
void setParent(IDiffContainer parent);
}
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