/*******************************************************************************
* Copyright (c) 2007, 2010 Association for Decentralized Information Management
* in Industry THTH ry.
* 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:
* VTT Technical Research Centre of Finland - initial API and implementation
*******************************************************************************/
package org.simantics.db.layer0.service.impl;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.Enumeration;
import java.util.UUID;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.MultiStatus;
import org.eclipse.core.runtime.Status;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.simantics.databoard.Bindings;
import org.simantics.databoard.Datatypes;
import org.simantics.databoard.serialization.Serializer;
import org.simantics.databoard.type.Datatype;
import org.simantics.db.Session;
import org.simantics.db.VirtualGraph;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.layer0.internal.Activator;
import org.simantics.db.service.VirtualGraphSupport;
import org.simantics.db.services.ServiceInitializer;
import org.simantics.graph.db.ImportAdvisor;
import org.simantics.graph.db.TransferableGraphs;
import org.simantics.graph.representation.TransferableGraph1;
/**
* A database client service initializer which ensures that any .tg
* files defined in a bundle folder virtualgraphs
are imported into
* randomly named in-memory virtualgraphs for the initialized session.
*
* @author Antti Villberg
*/
public class VirtualGraphInitializer implements ServiceInitializer {
@Override
public IStatus initialize(Session s) {
MultiStatus result = new MultiStatus(Activator.PLUGIN_ID, 0, "VirtualGraphInitialize errors:", null);
BundleContext context = Activator.getInstance().getContext();
Serializer datatypeSerializer = Bindings.getSerializerUnchecked( Datatype.class );
Datatype tgType = Datatypes.getDatatypeUnchecked(TransferableGraph1.class);
Serializer tgSerializer = Bindings.getSerializerUnchecked( TransferableGraph1.class );
for (final Bundle b : context.getBundles()) {
Enumeration> graphs = b.getEntryPaths("virtualgraphs");
while(graphs != null && graphs.hasMoreElements()) {
String element = (String)graphs.nextElement();
if(!element.endsWith(".tg"))
continue;
URL url = b.getEntry(element);
try {
InputStream stream = url.openStream();
Datatype dt = (Datatype) datatypeSerializer.deserialize( stream );
if(dt.equals(tgType)) {
VirtualGraphSupport support = s.getService(VirtualGraphSupport.class);
VirtualGraph vg = support.getMemoryPersistent(UUID.randomUUID().toString());
TransferableGraph1 tg = (TransferableGraph1) tgSerializer.deserialize(stream);
TransferableGraphs.importVirtualGraph(s, vg, tg,
new ImportAdvisor());
}
stream.close();
} catch (IOException e) {
IStatus status = new Status(IStatus.ERROR, context.getBundle().getSymbolicName(), "VirtualGraphInitializer transferable graph initialization failed for '" + url.toString() + "', see exception for details.", e);
result.add(status);
} catch (DatabaseException e) {
IStatus status = new Status(IStatus.ERROR, context.getBundle().getSymbolicName(), "VirtualGraphInitializer transferable graph initialization failed for '" + url.toString() + "', see exception for details.", e);
result.add(status);
}
}
}
if (!result.isOK()) return result;
return Status.OK_STATUS;
}
}