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/***************************************************************************
* Copyright (c) 2004 - 2007 Eike Stepper, Germany.
* 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:
* Eike Stepper - initial API and implementation
**************************************************************************/
package org.eclipse.emf.internal.cdo.util;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EPackage;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
/**
* @author Eike Stepper
*/
public class EMFPackageClosure extends PackageClosure
{
public EMFPackageClosure()
{
}
public Set<EPackage> calculate(EPackage ePackage)
{
Set<EPackage> visited = new HashSet<EPackage>();
collectContents(ePackage, visited);
return visited;
}
protected void collectContents(EPackage ePackage, Set<EPackage> visited)
{
visited.add(ePackage);
for (Iterator<EObject> it = ePackage.eAllContents(); it.hasNext();)
{
EObject content = it.next();
collectCrossReferences(content, visited);
}
}
protected void collectCrossReferences(EObject content, Set<EPackage> visited)
{
for (EObject crossReference : content.eCrossReferences())
{
EPackage crossReferencePackage = crossReference.eClass().getEPackage();
if (!visited.contains(crossReferencePackage))
{
collectContents(crossReferencePackage, visited);
}
}
}
}
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