Content of file ViewModelSelectControlSWTRenderer.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:
 * Eugen - initial API and implementation
 ******************************************************************************/
package org.eclipse.emf.ecp.view.template.internal.tooling.controls;

import org.eclipse.core.databinding.observable.IObserving;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.common.notify.AdapterFactory;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecp.common.spi.EMFUtils;
import org.eclipse.emf.ecp.view.internal.editor.controls.EditableEReferenceLabelControlSWTRenderer;
import org.eclipse.emf.ecp.view.model.common.edit.provider.CustomReflectiveItemProviderAdapterFactory;
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.VViewPackage;
import org.eclipse.emf.ecp.view.template.internal.tooling.Messages;
import org.eclipse.emf.edit.command.SetCommand;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
import org.eclipse.emf.edit.ui.provider.AdapterFactoryLabelProvider;
import org.eclipse.emfforms.spi.common.report.ReportService;
import org.eclipse.emfforms.spi.core.services.databinding.DatabindingFailedException;
import org.eclipse.jface.window.Window;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.dialogs.ElementListSelectionDialog;
import org.eclipse.ui.dialogs.ISelectionStatusValidator;

/**
 * Renderer for the
 * {@link org.eclipse.emf.ecp.view.template.selector.viewModelElement.model.VTViewModelElementSelector#setClassType(EClass)
 * VTViewModelElementSelector#setClassType(EClass)}.
 *
 * @author Eugen Neufeld
 *
 */
@SuppressWarnings("restriction")
public class ViewModelSelectControlSWTRenderer extends EditableEReferenceLabelControlSWTRenderer {

	/**
	 * Default constructor.
	 *
	 * @param vElement the view model element to be rendered
	 * @param viewContext the view context
	 * @param reportService the {@link ReportService}
	 */
	public ViewModelSelectControlSWTRenderer(VControl vElement, ViewModelContext viewContext,
		ReportService reportService) {
		super(vElement, viewContext, reportService);
	}

	private static final String PLUGIN_ID = "org.eclipse.emf.ecp.view.template.tooling"; //$NON-NLS-1$

	/**
	 * {@inheritDoc}
	 *
	 * @see org.eclipse.emf.ecp.view.internal.editor.controls.EditableEReferenceLabelControlSWTRenderer#linkValue(org.eclipse.swt.widgets.Shell)
	 */
	@Override
	protected void linkValue(Shell shell) {
		final ComposedAdapterFactory adapterFactory = new ComposedAdapterFactory(new AdapterFactory[] {
			new CustomReflectiveItemProviderAdapterFactory(),
			new ComposedAdapterFactory(ComposedAdapterFactory.Descriptor.Registry.INSTANCE) });
		final AdapterFactoryLabelProvider labelProvider = new AdapterFactoryLabelProvider(
			adapterFactory);

		final ElementListSelectionDialog elsd = new ElementListSelectionDialog(shell, labelProvider);
		elsd.setTitle(Messages.ViewModelSelectControlSWTRenderer_SelectionDialogTilte);
		elsd.setMultipleSelection(false);
		elsd.setValidator(new ISelectionStatusValidator() {

			@Override
			public IStatus validate(Object[] selection) {
				if (selection == null || selection.length == 0) {
					return new Status(IStatus.ERROR, PLUGIN_ID,
						Messages.ViewModelSelectControlSWTRenderer_ErrorNoSelection);
				}
				final Object object = selection[0];
				if (!EClass.class.isInstance(object)) {
					return new Status(IStatus.ERROR, PLUGIN_ID,
						Messages.ViewModelSelectControlSWTRenderer_ErrorNoEClass);
				}
				if (!VViewPackage.eINSTANCE.getElement().isSuperTypeOf(EClass.class.cast(object))) {
					return new Status(IStatus.ERROR, PLUGIN_ID,
						Messages.ViewModelSelectControlSWTRenderer_ErrorNoVElement);
				}
				return Status.OK_STATUS;
			}
		});
		elsd.setBlockOnOpen(true);
		elsd.setElements(EMFUtils.getSubClasses(VViewPackage.eINSTANCE.getElement()).toArray());
		final int open = elsd.open();
		labelProvider.dispose();
		adapterFactory.dispose();
		if (Window.CANCEL == open) {
			return;
		}
		final Object result = elsd.getFirstResult();

		final IObservableValue observableValue;
		try {
			observableValue = getEMFFormsDatabinding()
				.getObservableValue(getVElement().getDomainModelReference(), getViewModelContext().getDomainModel());
		} catch (final DatabindingFailedException ex) {
			showLinkValueFailedMessageDialog(shell, ex);
			return;
		}
		final EObject eObject = (EObject) ((IObserving) observableValue).getObserved();
		final EStructuralFeature structuralFeature = (EStructuralFeature) observableValue.getValueType();
		observableValue.dispose();
		final EditingDomain editingDomain = getEditingDomain(eObject);
		final Command command = SetCommand.create(editingDomain, eObject, structuralFeature, result);
		editingDomain.getCommandStack().execute(command);
	}

}