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/*******************************************************************************
* Copyright (c) 2007, 2009 THALES GLOBAL SERVICES.
* 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:
* Obeo - initial API and implementation
*******************************************************************************/
package org.eclipse.sirius.diagram.ui.tools.api.layout.ordering;
import org.eclipse.gmf.runtime.notation.Node;
import org.eclipse.sirius.diagram.AbstractDNode;
/**
* This class orders a list of {@link AbstractDNode}s.
*
*
* @author ymortier
*/
public abstract class AbstractViewNodeOrdering extends AbstractNodeViewOrdering {
/**
* Compare two {@link AbstractDNode}s. The return value depends on the
* relation order of <code>vp1</code> and <code>vp2</code>. It returns a
* positive number if <code>vp1</code> is greater than <code>vp2</code>, a
* negative number if <code>vp1</code> is lesser that <code>vp2</code> or
* <code>0</code> if <code>vp1</code> equals <code>vp2</code>.
*
* @param vp1
* the first element to compare.
* @param vp2
* the second element to compare.
* @return a positive number if <code>vp1</code> is greater than
* <code>vp2</code>, a negative number if <code>vp1</code> is lesser
* that <code>vp2</code> or <code>0</code> if <code>vp1</code>
* equals <code>vp2</code>.
*/
public abstract int compare(AbstractDNode vp1, AbstractDNode vp2);
/**
* {@inheritDoc}
*
* @see org.eclipse.sirius.diagram.business.api.layout.ordering.AbstractNodeViewOrdering#compare(org.eclipse.gmf.runtime.notation.Node,
* org.eclipse.gmf.runtime.notation.Node)
*/
@Override
public final int compare(final Node node1, final Node node2) {
final AbstractDNode viewNode1 = (AbstractDNode) node1.getElement();
final AbstractDNode viewNode2 = (AbstractDNode) node2.getElement();
return compare(viewNode1, viewNode2);
}
/**
* {@inheritDoc}
*
* @see org.eclipse.sirius.diagram.business.api.layout.ordering.AbstractNodeViewOrdering#isAbleToManageNode(org.eclipse.gmf.runtime.notation.Node)
*/
@Override
public final boolean isAbleToManageNode(final Node node) {
if (node.getElement() instanceof AbstractDNode) {
return isAbleToManageAbstractViewNode((AbstractDNode) node.getElement());
}
return false;
}
/**
* Return <code>true</code> if this
* {@link org.eclipse.sirius.diagram.business.api.layout.ordering.ViewOrdering}
* is able to manage the specified node.
*
* @param node
* the node to check.
* @return <code>true</code> if this
* {@link org.eclipse.sirius.diagram.business.api.layout.ordering.ViewOrdering}
* is able to manage the specified node.
*/
public abstract boolean isAbleToManageAbstractViewNode(AbstractDNode node);
}
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