EDIT

// $Id$

/**

 * Copyright (C) 2007 EDIT

 * European Distributed Institute of Taxonomy

 * http://www.e-taxonomy.eu

 *

 * The contents of this file are subject to the Mozilla Public License Version 1.1

 * See LICENSE.TXT at the top of this package for the full license terms.

 */

package eu.etaxonomy.taxeditor.io;

import java.io.File;

import java.io.FileOutputStream;

import java.util.List;

import org.eclipse.core.runtime.Assert;

import org.eclipse.core.runtime.IProgressMonitor;

import org.eclipse.core.runtime.IStatus;

import org.eclipse.core.runtime.Status;

import org.eclipse.core.runtime.jobs.Job;

import org.eclipse.swt.widgets.Display;

import org.eclipse.ui.IWorkbenchPart;

import eu.etaxonomy.cdm.api.application.CdmApplicationState;

import eu.etaxonomy.cdm.api.application.ICdmApplicationConfiguration;

import eu.etaxonomy.cdm.api.conversation.IConversationEnabled;

import eu.etaxonomy.cdm.io.common.CdmDefaultExport;

import eu.etaxonomy.cdm.io.common.ExportResult;

import eu.etaxonomy.cdm.io.common.IExportConfigurator;

import eu.etaxonomy.cdm.io.common.IIoConfigurator;

import eu.etaxonomy.cdm.io.jaxb.JaxbExportConfigurator;

import eu.etaxonomy.cdm.io.sdd.out.SDDExportConfigurator;

import eu.etaxonomy.cdm.io.service.IIOService;

import eu.etaxonomy.taxeditor.model.CdmProgressMonitorAdapter;

import eu.etaxonomy.taxeditor.model.MessagingUtils;

import eu.etaxonomy.taxeditor.store.StoreUtil;

import eu.etaxonomy.taxeditor.store.internal.TaxeditorStorePlugin;

/**

 * <p>

 * ExportHandler class.

 * </p>

 *

 * @author n.hoffmann

 * @created Sep 11, 2009

 * @version 1.0

 */

public class ExportManager extends AbstractIOManager<IExportConfigurator> {

	/**

	 *

	 * @param applicationConfiguration

	 */

	private ExportManager(ICdmApplicationConfiguration applicationConfiguration) {

		super(applicationConfiguration);

	}

	/**

	 * <p>

	 * NewInstance

	 * </p>

	 *

	 * @param applicationConfiguration

	 *            a

	 *            {@link eu.etaxonomy.cdm.api.application.CdmApplicationController}

	 *            object.

	 * @return a {@link eu.etaxonomy.taxeditor.io.ExportManager} object.

	 */

	public static ExportManager NewInstance(

			ICdmApplicationConfiguration applicationConfiguration) {

		return new ExportManager(applicationConfiguration);

	}

	/**

	 * <p>

	 * createIOJob

	 * </p>

	 *

	 * @param configurator

	 *            a {@link eu.etaxonomy.cdm.io.common.IExportConfigurator}

	 *            object.

	 * @return a {@link org.eclipse.core.runtime.jobs.Job} object.

	 */

	@Override

	protected Job createIOJob(final IExportConfigurator configurator) {

		Assert.isNotNull(configurator, "Configuration may not be null");

		final Display display = Display.getCurrent();

		Job job = new Job("Export: " + configurator.getClass().getSimpleName()) {

			@Override

			protected IStatus run(IProgressMonitor monitor) {

				monitor.beginTask(

						"Exporting database. This will take some time.", 100);

				monitor.worked(10);

			    /** see ticket # 4456 and */

//				display.asyncExec(new Runnable() {

//

//					@Override

//					public void run() {

//

//					    // terminate any open transactions

//						IConversationEnabled activePart = (IConversationEnabled) StoreUtil

//								.getActivePage().getActivePart();

//						activePart.getConversationHolder().commit(false);

//					}

//				});

//				monitor.worked(10);

				CdmDefaultExport<IExportConfigurator> exporter = new CdmDefaultExport<IExportConfigurator>();

				configurator.setProgressMonitor(CdmProgressMonitorAdapter

						.CreateSubMonitor(monitor, 80));

				exporter.setCdmAppController(applicationConfiguration);

				monitor.worked(10);

				try {

					exporter.invoke(configurator);

					monitor.worked(60);

				} catch (RuntimeException e) {

					MessagingUtils.messageDialog("Error exporting data", this,

							"An error occured while"

									+ "exporting to destination '"

									+ configurator.getDestinationNameString()

									+ "'.\n"

									+ "Please check error log for details.", e);

				}

				display.asyncExec(new Runnable() {

					@Override

					public void run() {

						IWorkbenchPart activePart = StoreUtil.getActivePage()

								.getActivePart();

						if (activePart instanceof IConversationEnabled) {

							// terminate any open transactions

							IConversationEnabled conversationEnabled = (IConversationEnabled) activePart;

							// restarting transaction and committing it to

							// trigger

							// change listener

							// TODO verify correct behaviour

							try{

								conversationEnabled.getConversationHolder()

									.startTransaction();

								conversationEnabled.getConversationHolder()

									.commit();

							}catch(RuntimeException e){

								MessagingUtils.messageDialog("Error starting conversation handling", this, "" +

										"Conversation Error: "+ e);

							}

						}

					}

				});

				monitor.worked(10);

				return Status.OK_STATUS;

			}

		};

		return job;

	}

	/* (non-Javadoc)

	 * @see eu.etaxonomy.taxeditor.io.AbstractIOManager#createIOServiceJob(eu.etaxonomy.cdm.io.common.IIoConfigurator)

	 */

	@Override

	public Job createIOServiceJob(final IExportConfigurator configurator, final File exportFile) {

	    Assert.isNotNull(configurator, "Configuration may not be null");

	    final Display display = Display.getCurrent();

	    Job job = new Job("Export: " + configurator.getClass().getSimpleName()) {

	        @Override

	        protected IStatus run(IProgressMonitor monitor) {

	            monitor.beginTask("Exporting database. This will take some time.", IProgressMonitor.UNKNOWN);

	            try {

	                IIOService ioService = CdmApplicationState.getIOService();

	                ExportResult result = ioService.export(configurator);

	                List<byte[]> dataList = result.getExportData();

	                byte[] exportData = dataList.get(0);

	                FileOutputStream stream = new FileOutputStream(exportFile);

	                try {

	                    stream.write(exportData);

	                } finally {

	                    stream.close();

	                }

	            } catch (Exception e) {

	                MessagingUtils.errorDialog("Error exporting data",

	                        this,

	                        e.getMessage(),

	                        TaxeditorStorePlugin.PLUGIN_ID,

	                        e,

	                        true);

	            }

	            return Status.OK_STATUS;

	        }

	    };

	    return job;

	}

	/**

	 * @param jaxb

	 * @return

	 */

	private IIoConfigurator getConfigurator(TYPE type) {

		Assert.isNotNull(type, "Type should not be null");

		switch (type) {

		case Jaxb:

			return JaxbExportConfigurator.NewInstance(null, null);

		case Sdd:

			return SDDExportConfigurator.NewInstance(null, null, null);

		default:

			MessagingUtils.notImplementedMessage(this);

			throw new IllegalArgumentException("Export not supported yet");

		}

	}

	/**

	 * <p>

	 * JaxbConfigurator

	 * </p>

	 *

	 * @return a {@link eu.etaxonomy.cdm.io.jaxb.JaxbExportConfigurator} object.

	 */

	public final JaxbExportConfigurator JaxbConfigurator() {

		return (JaxbExportConfigurator) getConfigurator(TYPE.Jaxb);

	}

	/**

	 * <p>

	 * SddConfigurator

	 * </p>

	 *

	 * @return a {@link eu.etaxonomy.cdm.io.sdd.out.SDDExportConfigurator}

	 *         object.

	 */

	public final SDDExportConfigurator SddConfigurator() {

		return (SDDExportConfigurator) getConfigurator(TYPE.Sdd);

	}

}