| /* |
| * 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 behaviour 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); |
| } |