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/*******************************************************************************
* Copyright (c) 2007, 2010 BMW Car IT, Technische Universitaet Muenchen, and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* BMW Car IT - Initial API and implementation
* Technische Universitaet Muenchen - Major refactoring and extension
*******************************************************************************/
package org.eclipse.emf.edapt.internal.migration.internal;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.edapt.internal.common.ResourceUtils;
import org.eclipse.emf.edapt.spi.migration.Metamodel;
/**
* Helper methods to deal with model backup.
*
* @author herrmama
* @author $Author$
* @version $Rev$
* @levd.rating YELLOW Hash: 79D1350584168827FC59AC2546F8221E
*/
public final class BackupUtils {
/** File extension for backed up model. */
public static final String BACKUP_FILE_EXTENSION = "backup"; //$NON-NLS-1$
/** File extension for log file. */
public static final String LOG_FILE_EXTENSION = "log"; //$NON-NLS-1$
/** Constructor. */
private BackupUtils() {
// hidden, since this class only provides static helper methods
}
/**
* Get the URI of the backup model corresponding to the URI of the model.
*
* @param modelURI
* URI of model
* @return URI of backup model
*/
public static URI getBackupURI(URI modelURI) {
return modelURI.appendFileExtension(BACKUP_FILE_EXTENSION);
}
/**
* Get the URI of the model corresponding to the URI of the backup model.
*
* @param backupURI
* URI of backup model
* @return URI of model
*/
public static URI getModelURI(URI backupURI) {
if (BACKUP_FILE_EXTENSION.equals(backupURI.fileExtension())) {
return backupURI.trimFileExtension();
}
return null;
}
/**
* Get the URI of the log file corresponding to the URI of the model.
*
* @param modelURI
* URI of model
* @return URI of log file
*/
public static URI getLogURI(URI modelURI) {
return modelURI.appendFileExtension(LOG_FILE_EXTENSION);
}
/** Backup a model based on a number of {@link URI}s. */
public static List<URI> backup(List<URI> modelURIs, Metamodel metamodel)
throws IOException {
return copy(modelURIs, metamodel, new BackupMapper());
}
/** Backup a model based on a number of {@link URI}s. */
public static List<URI> restore(List<URI> backupURIs, Metamodel metamodel)
throws IOException {
return copy(backupURIs, metamodel, new RestoreMapper());
}
/** Copy a model based on a number of {@link URI}s. */
public static List<URI> copy(List<URI> sourceURIs, Metamodel metamodel,
URIMapper mapper) throws IOException {
final List<URI> targetURIs = new ArrayList<URI>();
final ResourceSet model = ResourceUtils.loadResourceSet(sourceURIs, metamodel
.getEPackages());
for (final Resource resource : model.getResources()) {
if (resource.getURI() == null
|| resource.getURI().isPlatformPlugin()) {
continue;
}
final URI targetURI = mapper.map(resource.getURI());
if (targetURI != null) {
resource.setURI(targetURI);
targetURIs.add(targetURI);
}
}
ResourceUtils.saveResourceSet(model, null);
return targetURIs;
}
/** Mapper to perform a mapping on URIs. */
public static interface URIMapper {
/** Map a source URI to a target URI. */
URI map(URI uri);
}
/** Mapper to backup a model based on a number of {@link URI}s. */
private static class BackupMapper implements URIMapper {
/** {@inheritDoc} */
@Override
public URI map(URI uri) {
return getBackupURI(uri);
}
}
/** Mapper to restore a model based on a number of {@link URI}s. */
private static class RestoreMapper implements URIMapper {
/** {@inheritDoc} */
@Override
public URI map(URI uri) {
return getModelURI(uri);
}
}
}
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