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/*****************************************************************************
* Copyright (c) 2013 Cedric Dumoulin.
*
*
* 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:
* Cedric Dumoulin Cedric.dumoulin@lifl.fr - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.layers.stackmodel.util;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.gmf.runtime.notation.Edge;
import org.eclipse.gmf.runtime.notation.Shape;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.papyrus.layers.stackmodel.layers.Layer;
import org.eclipse.uml2.uml.NamedElement;
import com.google.common.base.Predicate;
/**
* A Predicate used to filter {@link View} allowed by {@link Layer}.
*
* @author cedric dumoulin
*
*/
public class LayerDiagramViewPredicate implements Predicate<View> {
/**
* Singleton instnace.
*/
public static final LayerDiagramViewPredicate instance = new LayerDiagramViewPredicate();
/**
* Return true if the view is allowed by Layers.
*
* @see com.google.common.base.Predicate#apply(java.lang.Object)
*
* @param view
* @return
*/
@Override
public boolean apply(View view) {
// View should be Shape or Edge
if( ! (view instanceof Shape || view instanceof Edge ) ) {
return false;
}
// Domain element should be set and should be NamedElement
EObject ele = view.getElement();
if( ele == null || !(ele instanceof NamedElement) ) {
return false;
}
// ok
return true;
}
}
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