bundles/org.eclipse.emf.ecp.view.indexdmr.tooling/src/org/eclipse/emf/ecp/view/indexdmr/tooling/PrefixDmrDomainModelReferenceRendererService.java

/*******************************************************************************
 * Copyright (c) 2011-2018 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 Koehler - initial API and implementation
 ******************************************************************************/
package org.eclipse.emf.ecp.view.indexdmr.tooling;

import org.eclipse.core.databinding.property.value.IValueProperty;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecp.view.internal.editor.controls.DomainModelReferenceControlSWTRenderer;
import org.eclipse.emf.ecp.view.spi.context.ViewModelContext;
import org.eclipse.emf.ecp.view.spi.indexdmr.model.VIndexdmrPackage;
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;
import org.eclipse.emfforms.spi.swt.core.AbstractSWTRenderer;
import org.eclipse.emfforms.spi.swt.core.di.EMFFormsDIRendererService;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;

/**
 * DI renderer service for {@link DomainModelReferenceControlSWTRenderer}.
 *
 * @author Lucas Koehler
 *
 */
@SuppressWarnings("restriction")
@Component(name = "PrefixDmrDomainModelReferenceRendererService")
public class PrefixDmrDomainModelReferenceRendererService implements EMFFormsDIRendererService<VControl> {

	private EMFFormsDatabinding databindingService;
	private ReportService reportService;

	/**
	 * Called by the framework to set the {@link EMFFormsDatabinding}.
	 *
	 * @param databindingService The {@link EMFFormsDatabinding}
	 */
	@Reference(unbind = "-")
	protected void setEMFFormsDatabinding(EMFFormsDatabinding databindingService) {
		this.databindingService = databindingService;
	}

	/**
	 * Called by the framework to set the {@link ReportService}.
	 *
	 * @param reportService The {@link ReportService}
	 */
	@Reference(unbind = "-")
	protected void setReportService(ReportService reportService) {
		this.reportService = reportService;
	}

	@Override
	public double 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 = databindingService.getValueProperty(control.getDomainModelReference(),
				viewModelContext.getDomainModel());
		} catch (final DatabindingFailedException ex) {
			reportService.report(new DatabindingFailedReport(ex));
			return NOT_APPLICABLE;
		}
		return isApplicable((EStructuralFeature) valueProperty.getValueType());
	}

	/**
	 * Test if the structural feature contains the correct data.
	 *
	 * @param feature the {@link EStructuralFeature} to check
	 * @return the priority of the control
	 */
	private double isApplicable(EStructuralFeature feature) {
		if (VIndexdmrPackage.Literals.INDEX_DOMAIN_MODEL_REFERENCE__PREFIX_DMR == feature) {
			return 3;
		}
		return NOT_APPLICABLE;
	}

	@Override
	public Class<? extends AbstractSWTRenderer<VControl>> getRendererClass() {
		return DomainModelReferenceControlSWTRenderer.class;
	}

}