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/***************************************************************************
* Copyright (c) 2004 - 2008 Eike Stepper, Germany, 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:
* Eike Stepper - initial API and implementation
* Martin Taal - specific hibernate functionality
**************************************************************************/
package org.eclipse.emf.cdo.server.internal.hibernate;
import org.eclipse.emf.cdo.common.id.CDOID;
import org.eclipse.emf.cdo.common.model.CDOClassRef;
import org.eclipse.emf.cdo.common.model.CDOFeature;
import org.eclipse.emf.cdo.common.model.CDOPackage;
import org.eclipse.emf.cdo.common.model.CDOPackageInfo;
import org.eclipse.emf.cdo.common.model.resource.CDOResourceClass;
import org.eclipse.emf.cdo.common.revision.CDORevision;
import org.eclipse.emf.cdo.server.ISession;
import org.eclipse.emf.cdo.server.IView;
import org.eclipse.emf.cdo.server.hibernate.IHibernateStoreReader;
import org.eclipse.emf.cdo.server.hibernate.id.CDOIDHibernate;
import org.eclipse.emf.cdo.server.internal.hibernate.bundle.OM;
import org.eclipse.net4j.util.collection.CloseableIterator;
import org.eclipse.net4j.util.om.trace.ContextTracer;
import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.criterion.Expression;
import java.util.Collection;
import java.util.List;
/**
* @author Eike Stepper
* @author Martin Taal
*/
public class HibernateStoreReader extends HibernateStoreAccessor implements IHibernateStoreReader
{
private static final ContextTracer TRACER = new ContextTracer(OM.DEBUG, HibernateStoreReader.class);
public HibernateStoreReader(HibernateStore store, ISession session)
{
super(store, session);
}
protected HibernateStoreReader(HibernateStore store, IView view)
{
super(store, view);
}
public HibernateStoreChunkReader createChunkReader(CDORevision revision, CDOFeature feature)
{
return new HibernateStoreChunkReader(this, revision, feature);
}
public CloseableIterator<CDOID> readObjectIDs(boolean withTypes)
{
throw new UnsupportedOperationException();
}
public CDOClassRef readObjectType(CDOID id)
{
CDORevision cdoRevision = readRevision(id, -1);
return cdoRevision.getCDOClass().createClassRef();
}
public void readPackage(CDOPackage cdoPackage)
{
getStore().getPackageHandler().readPackage(cdoPackage);
}
public Collection<CDOPackageInfo> readPackageInfos()
{
return getStore().getPackageHandler().getCDOPackageInfos();
}
public CDOID readResourceID(String path)
{
if (TRACER.isEnabled())
{
TRACER.trace("Finding resourceid using path " + path);
}
Session session = getHibernateSession();
Criteria criteria = session.createCriteria(CDOResourceClass.NAME);
criteria.add(Expression.eq("path", path));
List<?> result = criteria.list();
if (result.size() == 0)
{
if (TRACER.isEnabled())
{
TRACER.trace("Resource not found");
}
// TODO: throw exception?
return null;
}
// TODO: throw exception if list.size() > 1?
CDORevision cdoRevision = (CDORevision)result.get(0);
return cdoRevision.getID();
}
public String readResourcePath(CDOID id)
{
if (id == null)
{
throw new IllegalArgumentException("ID must be not null");
}
if (!(id instanceof CDOIDHibernate))
{
throw new IllegalArgumentException("ID type " + id.getClass().getName() + " not supported by hibernate reader");
}
if (TRACER.isEnabled())
{
TRACER.trace("Finding resource using id " + id);
}
Session session = getHibernateSession();
Query qry = session.createQuery("select path from " + CDOResourceClass.NAME + " where id=:id");
CDOIDHibernate idHibernate = (CDOIDHibernate)id;
qry.setParameter("id", idHibernate.getId());
final List<?> result = qry.list();
if (result.size() == 0)
{
if (TRACER.isEnabled())
{
TRACER.trace("Resource not found");
}
// TODO: throw exception?
return null;
}
return (String)result.get(0);
}
public CDORevision readRevision(CDOID id, int referenceChunk)
{
return HibernateUtil.getInstance().getCDORevision(id);
}
public CDORevision readRevisionByTime(CDOID id, int referenceChunk, long timeStamp)
{
throw new UnsupportedOperationException();
}
public CDORevision readRevisionByVersion(CDOID id, int referenceChunk, int version)
{
// TODO Could be necessary to implement
throw new UnsupportedOperationException();
}
}
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