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/*****************************************************************************
* Copyright (c) 2010 Atos Origin.
*
*
* 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:
* Mathieu Velten (Atos Origin) mathieu.velten@atosorigin.com - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.infra.gmfdiag.navigation;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
/**
* This class represents an element which can be accessed from an other element
* throught a feature using defined navigation rules.
*
* @author mvelten
*
*/
public abstract class NavigableElement implements Comparable<NavigableElement> {
private EObject element = null;
private EStructuralFeature feature = null;
private int depth = 0;
public NavigableElement(EObject element, EStructuralFeature feature) {
this.element = element;
this.feature = feature;
}
public NavigableElement(EObject element, NavigableElement previousNavigableElement, EStructuralFeature feature) {
this(element, feature);
if(previousNavigableElement != null) {
this.depth = previousNavigableElement.getDepth() + 1;
}
}
public EObject getElement() {
return element;
}
public EStructuralFeature getFeature() {
return feature;
}
/**
* Retrieve the navigation depth.
*
* @return the navigation depth
*/
public int getDepth() {
return depth;
}
public int compareTo(NavigableElement o) {
return getDepth() - o.getDepth();
}
}
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