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/*
* Copyright (c) 2009-2012, 2014 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:
* Simon McDuff - initial API and implementation
* Eike Stepper - maintenance
*/
package org.eclipse.emf.cdo.view;
import org.eclipse.emf.cdo.common.branch.CDOBranchPoint;
import org.eclipse.emf.cdo.common.id.CDOID;
import org.eclipse.emf.cdo.common.revision.CDOList;
import org.eclipse.emf.cdo.common.revision.CDORevision;
import org.eclipse.emf.cdo.common.revision.CDORevisionManager;
import org.eclipse.emf.cdo.view.CDOView.Options;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
import java.util.Collections;
import java.util.List;
/**
* A strategy interface to customize the {@link CDORevision revision} prefetching behavior of a {@link CDOView view}.
*
* @see Options#setRevisionPrefetchingPolicy(CDORevisionPrefetchingPolicy)
* @author Simon McDuff
* @since 2.0
*/
public interface CDORevisionPrefetchingPolicy
{
public static final CDORevisionPrefetchingPolicy NO_PREFETCHING = new CDORevisionPrefetchingPolicy()
{
public List<CDOID> loadAhead(CDORevisionManager revisionManager, CDOBranchPoint branchPoint, EObject targetObject,
EStructuralFeature feature, CDOList list, int accessIndex, CDOID accessID)
{
return Collections.emptyList();
}
};
/**
* @param revisionManager
* Lookup availability of objects in the cache with
* {@link CDORevisionManager#containsRevision(CDOID, CDOBranchPoint)}.
* @param targetObject
* Container of the list
* @return Should return a list of id's to be fetch.
* @since 3.0
*/
public List<CDOID> loadAhead(CDORevisionManager revisionManager, CDOBranchPoint branchPoint, EObject targetObject,
EStructuralFeature feature, CDOList list, int accessIndex, CDOID accessID);
}
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