MEMStoreChunkReader.java

/*
 * Copyright (c) 2009-2012 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:
 *    Simon McDuff - initial API and implementation
 *    Eike Stepper - maintenance
 */
package org.eclipse.emf.cdo.internal.server.mem;

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.server.IStoreAccessor;
import org.eclipse.emf.cdo.spi.common.revision.InternalCDORevision;
import org.eclipse.emf.cdo.spi.server.StoreChunkReader;

import org.eclipse.emf.ecore.EStructuralFeature;

import java.util.List;

/**
 * @author Simon McDuff
 */
public class MEMStoreChunkReader extends StoreChunkReader
{
  /**
   * @since 2.0
   */
  public MEMStoreChunkReader(IStoreAccessor accessor, CDORevision revision, EStructuralFeature feature)
  {
    super(accessor, revision, feature);
  }

  public List<Chunk> executeRead()
  {
    CDOID id = getRevision().getID();
    CDOBranchVersion branchVersion = getRevision();

    MEMStore store = getAccessor().getStore();
    List<Chunk> chunks = getChunks();
    for (Chunk chunk : chunks)
    {
      int startIndex = chunk.getStartIndex();
      InternalCDORevision revision = store.getRevisionByVersion(id, branchVersion);
      for (int i = 0; i < chunk.size(); i++)
      {
        Object object = revision.get(getFeature(), startIndex + i);
        chunk.add(i, object);
      }
    }

    return chunks;
  }

  /**
   * @since 2.0
   */
  @Override
  public MEMStoreAccessor getAccessor()
  {
    return (MEMStoreAccessor)super.getAccessor();
  }
}