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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:
* Remi Schnekenburger (CEA LIST) - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.infra.extendedtypes;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.gmf.runtime.emf.type.core.IContainerDescriptor;
import org.eclipse.gmf.runtime.emf.type.core.IElementMatcher;
/**
* @author RS211865
*/
public class ComposedContainerDescriptor implements IContainerDescriptor {
private final List<IContainerDescriptor> containerDescriptors;
/**
* @param containerDescriptors
*/
public ComposedContainerDescriptor(List<IContainerDescriptor> containerDescriptors) {
this.containerDescriptors = containerDescriptors;
}
/**
* {@inheritDoc}
*/
public IElementMatcher getMatcher() {
List<IElementMatcher> matchers = new ArrayList<IElementMatcher>();
// creates a composed matcher from all container descriptors
for (IContainerDescriptor containerDescriptor : getContainerDescriptors()) {
// each composed advice should approve the request
IElementMatcher composedMatcher = containerDescriptor.getMatcher();
if (composedMatcher != null) {
matchers.add(composedMatcher);
}
}
if (matchers != null && !matchers.isEmpty()) {
return new ComposedElementMatcher(matchers);
}
return null;
}
/**
* {@inheritDoc}
*/
public EReference[] getContainmentFeatures() {
// retrieve all references in the intersection of all composed container descriptors
List<EReference> joinReferences = null;
// creates a composed matcher from all container descriptors
for (IContainerDescriptor containerDescriptor : getContainerDescriptors()) {
// each composed advice should approve the request
EReference[] eReferencesArray = containerDescriptor.getContainmentFeatures();
if (eReferencesArray != null) {
List<EReference> eReferences = Arrays.asList(eReferencesArray);
// if join references has not been set yet, set the list of possible containment features
// if not, make the intersection of both list
if (joinReferences == null) {
joinReferences = eReferences;
} else {
List<EReference> newReferences = new ArrayList<EReference>();
for (EReference eReference : joinReferences) {
if (eReferences.contains(eReference)) {
newReferences.add(eReference);
}
}
joinReferences = newReferences;
}
}
}
if (joinReferences != null) {
return joinReferences.toArray(new EReference[] {});
}
return null;
}
/**
* @return the containerDescriptors
*/
protected List<IContainerDescriptor> getContainerDescriptors() {
return containerDescriptors;
}
}
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