Content of file MigrateHandler.java

/**
 * Copyright (c) 2011-2013 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 Neufeld - initial API and implementation
 */
package org.eclipse.emf.ecp.view.internal.editor.handler;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.databinding.property.value.IValueProperty;
import org.eclipse.emf.common.util.TreeIterator;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecp.view.internal.editor.controls.Activator;
import org.eclipse.emf.ecp.view.spi.editor.controls.Helper;
import org.eclipse.emf.ecp.view.spi.model.VControl;
import org.eclipse.emf.ecp.view.spi.model.VFeaturePathDomainModelReference;
import org.eclipse.emf.ecp.view.spi.model.VView;
import org.eclipse.emf.ecp.view.spi.model.VViewPackage;
import org.eclipse.emf.edit.command.AddCommand;
import org.eclipse.emf.edit.domain.AdapterFactoryEditingDomain;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.emfforms.spi.core.services.databinding.DatabindingFailedException;
import org.eclipse.emfforms.spi.core.services.databinding.DatabindingFailedReport;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.handlers.HandlerUtil;

/**
 * The Handler for migrating existing models.
 *
 * @author Eugen Neufeld
 *
 */
// TODO needed?
public class MigrateHandler extends AbstractHandler {
	/**
	 *
	 * {@inheritDoc}
	 *
	 * @see org.eclipse.core.commands.AbstractHandler#execute(org.eclipse.core.commands.ExecutionEvent)
	 */
	@Override
	public Object execute(ExecutionEvent event) throws ExecutionException {
		final Object selection = ((IStructuredSelection) HandlerUtil.getCurrentSelection(event)).getFirstElement();
		final VView view = (VView) selection;

		final Map<EClass, EReference> childParentReferenceMap = new HashMap<EClass, EReference>();
		final EClass rootClass = Helper.getRootEClass(view);

		Helper.getReferenceMap(rootClass, childParentReferenceMap);

		final EditingDomain editingDomain = AdapterFactoryEditingDomain.getEditingDomainFor(view);

		final TreeIterator<EObject> eAllContents = view.eAllContents();
		while (eAllContents.hasNext()) {
			final EObject eObject = eAllContents.next();
			if (!VControl.class.isInstance(eObject)) {
				continue;
			}
			final VControl control = (VControl) eObject;
			IValueProperty valueProperty;
			try {
				valueProperty = Activator.getDefault().getEMFFormsDatabinding()
					.getValueProperty(control.getDomainModelReference(), null);
			} catch (final DatabindingFailedException ex) {
				Activator.getDefault().getReportService().report(new DatabindingFailedReport(ex));
				continue;
			}
			final EStructuralFeature structuralFeature = (EStructuralFeature) valueProperty.getValueType();
			final List<EReference> bottomUpPath = Helper.getReferencePath(rootClass,
				structuralFeature.getEContainingClass(), childParentReferenceMap);
			// control.getPathToFeature().addAll(bottomUpPath);
			((VFeaturePathDomainModelReference) control.getDomainModelReference()).getDomainModelEReferencePath()
				.clear();
			editingDomain.getCommandStack().execute(
				AddCommand.create(editingDomain, control.getDomainModelReference(),
					VViewPackage.eINSTANCE.getFeaturePathDomainModelReference_DomainModelEReferencePath(),
					bottomUpPath));
		}
		return null;
	}

}