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/***************************************************************************
* Copyright (c) 2004 - 2008 Eike Stepper, Germany.
* 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.internal.cdo.protocol;
import org.eclipse.emf.cdo.internal.protocol.CDOIDImpl;
import org.eclipse.emf.cdo.internal.protocol.model.CDOClassRefImpl;
import org.eclipse.emf.cdo.internal.protocol.revision.InternalCDORevision;
import org.eclipse.emf.cdo.protocol.CDOID;
import org.eclipse.emf.cdo.protocol.CDOProtocolConstants;
import org.eclipse.emf.cdo.protocol.model.CDOFeature;
import org.eclipse.emf.internal.cdo.bundle.OM;
import org.eclipse.net4j.channel.IChannel;
import org.eclipse.net4j.internal.util.om.trace.ContextTracer;
import org.eclipse.net4j.util.collection.MoveableList;
import org.eclipse.net4j.util.io.ExtendedDataInputStream;
import org.eclipse.net4j.util.io.ExtendedDataOutputStream;
import java.io.IOException;
/**
* @author Eike Stepper
*/
public class LoadChunkRequest extends CDOClientRequest<CDOID>
{
private static final ContextTracer PROTOCOL = new ContextTracer(OM.DEBUG_PROTOCOL, LoadChunkRequest.class);
private InternalCDORevision revision;
private CDOFeature feature;
private int accessIndex;
private int fromIndex;
private int toIndex;
public LoadChunkRequest(IChannel channel, InternalCDORevision revision, CDOFeature feature, int accessIndex,
int fromIndex, int toIndex)
{
super(channel);
this.revision = revision;
this.feature = feature;
this.accessIndex = accessIndex;
this.fromIndex = fromIndex;
this.toIndex = toIndex;
}
@Override
protected short getSignalID()
{
return CDOProtocolConstants.SIGNAL_LOAD_CHUNK;
}
@Override
protected void requesting(ExtendedDataOutputStream out) throws IOException
{
CDOID id = revision.getID();
if (PROTOCOL.isEnabled())
{
PROTOCOL.format("Writing revision ID: {0}", id);
}
CDOIDImpl.write(out, id);
int version = revision.getVersion();
if (revision.isTransactional())
{
--version;
}
if (PROTOCOL.isEnabled())
{
PROTOCOL.format("Writing revision version: {0}", version);
}
out.writeInt(version);
if (PROTOCOL.isEnabled())
{
PROTOCOL.format("Writing feature: {0}", feature);
}
CDOClassRefImpl classRef = (CDOClassRefImpl)feature.getContainingClass().createClassRef();
classRef.write(out, null);
out.writeInt(feature.getFeatureID());
if (PROTOCOL.isEnabled())
{
PROTOCOL.format("Writing fromIndex: {0}", fromIndex);
}
out.writeInt(fromIndex);
if (PROTOCOL.isEnabled())
{
PROTOCOL.format("Writing toIndex: {0}", toIndex);
}
out.writeInt(toIndex);
}
@Override
protected CDOID confirming(ExtendedDataInputStream in) throws IOException
{
CDOID accessID = null;
MoveableList<Object> list = revision.getList(feature);
for (int i = fromIndex; i <= toIndex; i++)
{
CDOID id = CDOIDImpl.read(in);
list.set(i, id);
if (i == accessIndex)
{
accessID = id;
}
}
return accessID;
}
}
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