Content of file SingleReferenceRendererTester.java
/*******************************************************************************
* Copyright (c) 2011-2014 EclipseSource Muenchen GmbH and others.
*
* 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:
* Lucas - initial API and implementation
******************************************************************************/
package org.eclipse.emf.ecp.view.model.common;
import org.eclipse.core.databinding.property.value.IValueProperty;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecore.EcorePackage;
import org.eclipse.emf.ecp.view.spi.context.ViewModelContext;
import org.eclipse.emf.ecp.view.spi.model.VControl;
import org.eclipse.emf.ecp.view.spi.model.VElement;
import org.eclipse.emfforms.spi.common.report.ReportService;
import org.eclipse.emfforms.spi.core.services.databinding.DatabindingFailedException;
import org.eclipse.emfforms.spi.core.services.databinding.DatabindingFailedReport;
import org.eclipse.emfforms.spi.core.services.databinding.EMFFormsDatabinding;
/**
* @author Lucas Koehler
*
*/
public class SingleReferenceRendererTester implements ECPRendererTester {
/**
*
* {@inheritDoc}
*
* @see org.eclipse.emf.ecp.view.model.common.ECPRendererTester#isApplicable(org.eclipse.emf.ecp.view.spi.model.VElement,
* org.eclipse.emf.ecp.view.spi.context.ViewModelContext)
*/
@Override
public int isApplicable(VElement vElement, ViewModelContext viewModelContext) {
if (!VControl.class.isInstance(vElement)) {
return NOT_APPLICABLE;
}
final VControl control = (VControl) vElement;
if (control.getDomainModelReference() == null) {
return NOT_APPLICABLE;
}
IValueProperty valueProperty;
try {
valueProperty = viewModelContext.getService(EMFFormsDatabinding.class)
.getValueProperty(control.getDomainModelReference(), viewModelContext.getDomainModel());
} catch (final DatabindingFailedException ex) {
viewModelContext.getService(ReportService.class).report(new DatabindingFailedReport(ex));
return NOT_APPLICABLE;
}
final EStructuralFeature feature = (EStructuralFeature) valueProperty.getValueType();
if (feature.isMany()) {
return NOT_APPLICABLE;
}
// if we have a reference
if (!EReference.class.isInstance(feature)) {
return NOT_APPLICABLE;
}
final EReference eReference = EReference.class.cast(feature);
if (EcorePackage.eINSTANCE.getEObject().isInstance(eReference.getEType())) {
return 3;
}
return NOT_APPLICABLE;
}
}