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/*
* Copyright (c) 2010-2012, 2015, 2019 Eike Stepper (Loehne, 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.common.revision;
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.internal.common.revision.NOOPRevisionCache;
import org.eclipse.net4j.util.event.IEvent;
import org.eclipse.net4j.util.event.INotifier;
import org.eclipse.emf.ecore.EClass;
import java.util.List;
/**
* Caches {@link CDORevision revisions} and possibly {@link EvictionEvent evicts} those that are no longer strongly
* referenced when free memory runs low.
*
* @author Eike Stepper
* @since 4.0
* @noextend This interface is not intended to be extended by clients.
* @noimplement This interface is not intended to be implemented by clients.
*/
public interface CDORevisionCache extends CDORevisionCacheAdder, INotifier
{
/**
* @since 3.0
*/
public static final CDORevisionCache NOOP = NOOPRevisionCache.INSTANCE;
public EClass getObjectType(CDOID id);
/**
* @since 3.0
*/
public CDORevision getRevision(CDOID id, CDOBranchPoint branchPoint);
/**
* @since 3.0
*/
public CDORevision getRevisionByVersion(CDOID id, CDOBranchVersion branchVersion);
/**
* Returns a list of {@link CDORevision revisions} that are current.
*
* @since 3.0
*/
public List<CDORevision> getCurrentRevisions();
/**
* An {@link IEvent event} fired from a {@link CDORevisionCache revision cache} for {@link CDORevision revisions} that
* are evicted because they are no longer strongly referenced when free memory runs low.
*
* @author Eike Stepper
* @noextend This interface is not intended to be extended by clients.
* @noimplement This interface is not intended to be implemented by clients.
*/
public interface EvictionEvent extends IEvent, CDORevisionKey
{
/**
* @since 3.0
*/
public CDORevisionCache getSource();
/**
* May be <code>null</code> for certain cache implementations.
*
* @since 3.0
*/
public CDORevision getRevision();
}
}
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