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/*****************************************************************************
* Copyright (c) 2015 CEA LIST 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:
* CEA LIST - Initial API and implementation
* Jeremie Tatibouet (CEA LIST)
*
*****************************************************************************/
package org.eclipse.papyrus.uml.alf.properties.xtext.constraints;
import org.eclipse.uml2.uml.Association;
import org.eclipse.uml2.uml.AssociationClass;
import org.eclipse.uml2.uml.CommunicationPath;
import org.eclipse.uml2.uml.Extension;
/**
* This class implements the opening constraints for the ALF editor
*/
public class ALFFilterConstraint {
private ALFFilterConstraint() {
}
/**
* Checks if an association can edited using ALF
*
* @param association
* the association evaluated against the constraints
*
* @return conforms
* true if the association respects the constraints
*/
public static boolean conforms(Association association) {
boolean conforms = true;
/* The editor can only be opened for associations owning all of their ends */
if (association != null && isStrictAssociation(association)) {
conforms = association.getOwnedEnds().size() == association.getMemberEnds().size();
}
return conforms;
}
/**
* Checks if a given association is strictly an Association and not an instance of one of the sub-classes
*
* @param association
* the association for which we verifies that it is not a sub-class instance
*
* @return true if the association is only an instance of Association, false otherwise
*/
private static boolean isStrictAssociation(Association association) {
return !(association instanceof AssociationClass) &&
!(association instanceof CommunicationPath) &&
!(association instanceof Extension);
}
}
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