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/*******************************************************************************
* Copyright (c) 2010, 2020 THALES GLOBAL SERVICES.
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Obeo - initial API and implementation
*******************************************************************************/
package org.eclipse.sirius.diagram.sequence.business.internal.refresh;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.gmf.runtime.notation.Diagram;
import org.eclipse.gmf.runtime.notation.Edge;
import org.eclipse.gmf.runtime.notation.Node;
import org.eclipse.gmf.runtime.notation.NotationPackage;
import org.eclipse.gmf.runtime.notation.View;
import com.google.common.base.Predicate;
/**
* Predicate to notify SequenceCanonicalSynchronizerAdapter only for adding of GMF View.
*
* @author edugueperoux
*/
public class SequenceCanonicalSynchronizerAdapterScope implements Predicate<Notification> {
private Diagram diagramView;
/**
* Constructor.
*
* @param diagramView
* the diagram of interest.
*/
public SequenceCanonicalSynchronizerAdapterScope(Diagram diagramView) {
this.diagramView = diagramView;
}
/**
* {@inheritDoc}
*/
@Override
public boolean apply(Notification notification) {
return (isNotificationForNodeAdding(notification) || isNotificationForEdgeAdding(notification)) && isDiagramOfInterestConcerned(notification);
}
private boolean isDiagramOfInterestConcerned(Notification notification) {
Object notifier = notification.getNotifier();
return diagramView != null && notifier instanceof View && diagramView == ((View) notifier).getDiagram();
}
/**
* Checks if this notification is about a add of a {@link Node} to the parent {@link Node}.
*
* @param notification
* {@link Notification} to check
*
* @return true if this notification is about a add of a {@link Node} to the parent {@link Node}
*/
public static boolean isNotificationForNodeAdding(Notification notification) {
boolean isNotificationForNodeAdding = false;
Object newValue = notification.getNewValue();
Object feature = notification.getFeature();
isNotificationForNodeAdding = NotationPackage.Literals.VIEW__PERSISTED_CHILDREN.equals(feature) && Notification.ADD == notification.getEventType() && newValue instanceof Node
&& isNotANote(newValue);
return isNotificationForNodeAdding;
}
/**
* Test that newValue is not a GMF Shape which represents a Note.
*
* @param newValue
* the object to test
*
* @return true if newValue is not a GMF Shape which represents a Note, false else
*/
private static boolean isNotANote(Object newValue) {
return ((Node) newValue).getElement() != null;
}
/**
* Checks if this notification is about a add of a {@link Edge} to the parent
* {@link org.eclipse.gmf.runtime.notation.Diagram.Diagram}.
*
* @param notification
* {@link Notification} to check
*
* @return true if this notification is about a add of a {@link Edge} to the parent
* {@link org.eclipse.gmf.runtime.notation.Diagram}
*/
public static boolean isNotificationForEdgeAdding(Notification notification) {
boolean isNotificationForEdgeAdding = false;
Object newValue = notification.getNewValue();
Object feature = notification.getFeature();
isNotificationForEdgeAdding = NotationPackage.Literals.DIAGRAM__PERSISTED_EDGES.equals(feature) && Notification.ADD == notification.getEventType() && newValue instanceof Edge;
return isNotificationForEdgeAdding;
}
}
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