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/*
* Copyright (c) 2004 - 2012 Eike Stepper (Berlin, 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
*/
package org.eclipse.emf.cdo.internal.common.revision;
import org.eclipse.emf.cdo.common.branch.CDOBranch;
import org.eclipse.emf.cdo.common.branch.CDOBranchPoint;
import org.eclipse.emf.cdo.common.branch.CDOBranchVersion;
import org.eclipse.emf.cdo.common.id.CDOID;
import org.eclipse.emf.cdo.common.revision.CDORevision;
import org.eclipse.emf.cdo.spi.common.revision.InternalCDORevision;
import org.eclipse.emf.cdo.spi.common.revision.InternalCDORevisionCache;
import org.eclipse.net4j.util.lifecycle.Lifecycle;
import org.eclipse.emf.ecore.EClass;
import java.util.Collections;
import java.util.List;
import java.util.Map;
/**
* @author Eike Stepper
*/
public class NOOPRevisionCache extends Lifecycle implements InternalCDORevisionCache
{
public static final NOOPRevisionCache INSTANCE = new NOOPRevisionCache();
private static final List<CDORevision> EMPTY = Collections.emptyList();
public NOOPRevisionCache()
{
}
public InternalCDORevisionCache instantiate(CDORevision revision)
{
return this;
}
public boolean isSupportingBranches()
{
return true;
}
public EClass getObjectType(CDOID id)
{
return null;
}
public List<CDORevision> getCurrentRevisions()
{
return EMPTY;
}
public InternalCDORevision getRevision(CDOID id)
{
return null;
}
public InternalCDORevision getRevision(CDOID id, CDOBranchPoint branchPoint)
{
return null;
}
public InternalCDORevision getRevisionByVersion(CDOID id, CDOBranchVersion branchVersion)
{
return null;
}
public void addRevision(CDORevision revision)
{
// Do nothing
}
public InternalCDORevision removeRevision(CDOID id, CDOBranchVersion branchVersion)
{
return null;
}
public void clear()
{
// Do nothing
}
public Map<CDOBranch, List<CDORevision>> getAllRevisions()
{
return Collections.emptyMap();
}
public List<CDORevision> getRevisions(CDOBranchPoint branchPoint)
{
return Collections.emptyList();
}
}
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