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/***************************************************************************
* Copyright (c) 2004 - 2008 Martin Taal 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:
* Martin Taal - initial API and implementation
**************************************************************************/
package org.eclipse.emf.cdo.server.internal.hibernate;
import org.eclipse.emf.cdo.protocol.id.CDOID;
import org.eclipse.emf.cdo.protocol.id.CDOIDTemp;
import org.eclipse.emf.cdo.protocol.revision.CDORevision;
import org.eclipse.emf.cdo.server.IStoreWriter.CommitContext;
import org.eclipse.emf.cdo.server.hibernate.CDOIDHibernate;
import org.hibernate.Session;
/**
* @author Martin Taal
*/
public class HibernateUtil
{
private static HibernateUtil instance = new HibernateUtil();
/**
* @return the instance
*/
public static HibernateUtil getInstance()
{
return instance;
}
/**
* @param instance
* the instance to set
*/
public static void setInstance(HibernateUtil instance)
{
HibernateUtil.instance = instance;
}
public String getEntityName(CDORevision cdoRevision)
{
return cdoRevision.getCDOClass().getName();
}
/**
* Translates a temporary cdoID into a hibernate ID, by finding the object it refers to in the CommitContext and then
* returning or by persisting the object. Note assumes that the hibernate session and CommitContext are set in
* HibernateThreadContext.
*/
public CDOIDHibernate getCDOIDHibernate(CDOID cdoID)
{
final CDORevision cdoRevision = getCDORevision(cdoID);
if (cdoRevision.getID() instanceof CDOIDHibernate)
{
return (CDOIDHibernate)cdoRevision.getID();
}
final Session session = HibernateThreadContext.getSession();
session.saveOrUpdate(cdoRevision);
if (!(cdoRevision.getID() instanceof CDOIDHibernate))
{
throw new IllegalStateException("CDORevision " + cdoRevision.getCDOClass().getName() + " " + cdoRevision.getID()
+ " does not have a hibernate cdoid after saving/updating it");
}
return (CDOIDHibernate)cdoRevision.getID();
}
/**
* Gets a current object, first checks the new and dirty objects from the commitcontent. Otherwise reads it from the
* session.
*/
public CDORevision getCDORevision(CDOID id)
{
final CommitContext commitContext = HibernateThreadContext.getCommitContext();
for (CDORevision revision : commitContext.getNewObjects())
{
if (revision.getID().equals(id))
{
return revision;
}
}
for (CDORevision revision : commitContext.getDirtyObjects())
{
if (revision.getID().equals(id))
{
return revision;
}
}
// maybe the temp was already translated
if (id instanceof CDOIDTemp)
{
final CDOID newID = commitContext.getIDMappings().get(id);
if (newID != null)
{
return getCDORevision(newID);
}
}
if (!(id instanceof CDOIDHibernate))
{
throw new IllegalArgumentException("Passed cdoid is not an instance of CDOIDHibernate but a "
+ id.getClass().getName() + ": " + id);
}
final CDOIDHibernate cdoIDHibernate = (CDOIDHibernate)id;
final Session session = HibernateThreadContext.getSession();
return (CDORevision)session.get(cdoIDHibernate.getEntityName(), cdoIDHibernate.getId());
}
}
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