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/*****************************************************************************
* Copyright (c) 2013 CEA LIST.
*
*
* 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
*
*****************************************************************************/
package org.eclipse.papyrus.views.search.validator;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import org.eclipse.emf.common.util.TreeIterator;
import org.eclipse.emf.ecore.EObject;
/**
*
* A generic implementation of participant validator that works on EMF basis
*
*/
public class ParticipantValidator implements IParticipantValidator {
private static ParticipantValidator instance = null;
private ParticipantValidator() {
super();
}
public final static ParticipantValidator getInstance() {
if(ParticipantValidator.instance == null) {
synchronized(ParticipantValidator.class) {
if(ParticipantValidator.instance == null) {
ParticipantValidator.instance = new ParticipantValidator();
}
}
}
return ParticipantValidator.instance;
}
public Collection<EObject> getParticipants(EObject root, Object[] participantsTypes) {
List<Object> participantsTypesList = Arrays.asList(participantsTypes);
List<EObject> results = new ArrayList<EObject>();
// Evaluate root...
if(participantsTypesList.contains(root.eClass())) {
results.add(root);
}
// ... and all its content
TreeIterator<EObject> it = root.eAllContents();
while(it.hasNext()) {
EObject modelElement = (EObject)it.next();
//Check that metaclass of this element is a supported metaclass
if(participantsTypesList.contains(modelElement.eClass())) {
results.add(modelElement);
}
}
return results;
}
}
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