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/*****************************************************************************
* Copyright (c) 2014 CEA LIST.
*
* All rights reserved. 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:
* Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation
*****************************************************************************/
package org.eclipse.papyrus.emf.facet.custom.ui.internal.query;
import java.util.Collection;
import org.eclipse.emf.ecore.EAttribute;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.papyrus.emf.facet.efacet.core.IFacetManager;
import org.eclipse.papyrus.emf.facet.efacet.core.exception.DerivedTypedElementException;
import org.eclipse.papyrus.emf.facet.efacet.metamodel.v0_2_0.efacet.FacetReference;
import org.eclipse.papyrus.emf.facet.efacet.metamodel.v0_2_0.efacet.ParameterValue;
import org.eclipse.papyrus.emf.facet.query.java.core.IJavaQuery2;
import org.eclipse.papyrus.emf.facet.query.java.core.IParameterValueList2;
/**
* Determines the default value for visibility
*
* False for EAttributes and empty references, true otherwise
*
* Default implementation in EMF Facet is always true (TrueLiteralQuery)
*
* @author Camille Letavernier
*
*/
public class DefaultVisibilityQuery implements IJavaQuery2<EObject, Boolean> {
public Boolean evaluate(EObject source, IParameterValueList2 parameterValues, IFacetManager facetManager) throws DerivedTypedElementException {
ParameterValue paramValue = parameterValues.getParameterValueByName("eStructuralFeature");
if (paramValue == null) {
return true;
}
EStructuralFeature feature = (EStructuralFeature) paramValue.getValue();
if (feature == null) {
return true;
}
if (feature instanceof EAttribute) {
return false;
}
if (feature instanceof FacetReference) {
return true;
}
if (feature instanceof EReference) {
Object value = source.eGet(feature);
if (value == null) {
return false;
}
if (value instanceof Collection<?>) {
return !((Collection<?>) value).isEmpty();
}
}
return true;
}
}
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