org.eclipse.emf.emfstore.client.ui/src/org/eclipse/emf/emfstore/client/ui/handlers/UpdateProjectVersionHandler.java

/*******************************************************************************
 * Copyright 2012 EclipseSource Muenchen GmbH.
 * 
 * All rights reserved. This program and the accompanying materials
 * are made available under the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 ******************************************************************************/
package org.eclipse.emf.emfstore.client.ui.handlers;

import java.util.Iterator;
import java.util.List;

import org.eclipse.emf.emfstore.client.model.ProjectSpace;
import org.eclipse.emf.emfstore.client.ui.controller.UIUpdateProjectController;
import org.eclipse.emf.emfstore.server.exceptions.EmfStoreException;
import org.eclipse.emf.emfstore.server.model.versioning.HistoryInfo;
import org.eclipse.emf.emfstore.server.model.versioning.RangeQuery;
import org.eclipse.emf.emfstore.server.model.versioning.Versions;
import org.eclipse.emf.emfstore.server.model.versioning.util.HistoryQueryBuilder;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.ui.dialogs.ListDialog;

/**
 * Handler for updating a project to a specific version.<br/>
 * It is assumed that the user previously has selected a {@link ProjectSpace} instance.<br/>
 * 
 * @author ovonwesen
 * @author emueller
 * @author eneufeld
 */
public class UpdateProjectVersionHandler extends AbstractEMFStoreHandler {

	@Override
	public void handle() {
		ProjectSpace ps = requireSelection(ProjectSpace.class);
		if (ps != null) {
			// TODO move logic to UIController
			RangeQuery query = HistoryQueryBuilder.rangeQuery(ps.getBaseVersion(), 20, 0, false, false, false, false);
			try {
				List<HistoryInfo> historyInfo = ps.getHistoryInfo(query);
				// filter base version
				Iterator<HistoryInfo> iter = historyInfo.iterator();
				while (iter.hasNext()) {
					if (ps.getBaseVersion().equals(iter.next().getPrimerySpec())) {
						iter.remove();
						break;
					}
				}
				if (historyInfo.size() == 0) {
					new UIUpdateProjectController(getShell(), ps, Versions.createHEAD(ps.getBaseVersion())).execute();
					return;
				}

				ListDialog listDialog = new ListDialog(getShell());
				listDialog.setContentProvider(ArrayContentProvider.getInstance());
				listDialog.setLabelProvider(new LabelProvider() {

					@Override
					public String getText(Object element) {

						HistoryInfo historyInfo = (HistoryInfo) element;

						StringBuilder sb = new StringBuilder("Version ");
						sb.append(Integer.toString(historyInfo.getPrimerySpec().getIdentifier()));
						sb.append("  -  ");
						sb.append(historyInfo.getLogMessage().getMessage());

						return sb.toString();

					}

				});
				listDialog.setInput(historyInfo);
				listDialog.setTitle("Select a Version to update to");
				listDialog.setMessage("The project will be updated to the selected Version");
				listDialog.setInitialSelections(new Object[] { historyInfo.get(0) });
				int result = listDialog.open();
				if (Dialog.OK == result) {
					Object[] selection = listDialog.getResult();
					HistoryInfo info = (HistoryInfo) selection[0];

					new UIUpdateProjectController(getShell(), ps, Versions.createPRIMARY(info.getPrimerySpec()
						.getIdentifier())).execute();
				}
			} catch (EmfStoreException e) {

			}
		}

	}
}