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/***************************************************************************
* Copyright (c) 2004 - 2009 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:
* Eike Stepper - initial API and implementation
**************************************************************************/
package org.eclipse.emf.internal.cdo.net4j.protocol;
import org.eclipse.emf.cdo.common.id.CDOID;
import org.eclipse.emf.cdo.common.io.CDODataInput;
import org.eclipse.emf.cdo.common.io.CDODataOutput;
import org.eclipse.emf.cdo.common.model.CDOModelUtil;
import org.eclipse.emf.cdo.common.model.CDOType;
import org.eclipse.emf.cdo.common.protocol.CDOProtocolConstants;
import org.eclipse.emf.cdo.spi.common.revision.InternalCDORevision;
import org.eclipse.emf.internal.cdo.bundle.OM;
import org.eclipse.net4j.util.collection.MoveableList;
import org.eclipse.net4j.util.om.trace.ContextTracer;
import org.eclipse.emf.ecore.EStructuralFeature;
import java.io.IOException;
/**
* @author Eike Stepper
*/
public class LoadChunkRequest extends CDOClientRequest<Object>
{
private static final ContextTracer TRACER = new ContextTracer(OM.DEBUG_PROTOCOL, LoadChunkRequest.class);
private InternalCDORevision revision;
private EStructuralFeature feature;
private int accessIndex;
private int fromIndex;
private int toIndex;
private int fetchIndex;
public LoadChunkRequest(CDOClientProtocol protocol, InternalCDORevision revision, EStructuralFeature feature,
int accessIndex, int fetchIndex, int fromIndex, int toIndex)
{
super(protocol, CDOProtocolConstants.SIGNAL_LOAD_CHUNK);
this.revision = revision;
this.feature = feature;
this.accessIndex = accessIndex;
this.fetchIndex = fetchIndex;
this.fromIndex = fromIndex;
this.toIndex = toIndex;
}
@Override
protected void requesting(CDODataOutput out) throws IOException
{
CDOID id = revision.getID();
if (TRACER.isEnabled())
{
TRACER.format("Writing revision ID: {0}", id); //$NON-NLS-1$
}
out.writeCDOID(id);
int version = revision.getVersion();
if (revision.isTransactional())
{
--version;
}
if (TRACER.isEnabled())
{
TRACER.format("Writing revision version: {0}", version); //$NON-NLS-1$
}
out.writeInt(version);
if (TRACER.isEnabled())
{
TRACER.format("Writing feature: {0}", feature); //$NON-NLS-1$
}
out.writeCDOClassifierRef(feature.getEContainingClass());
out.writeInt(feature.getFeatureID());
if (TRACER.isEnabled())
{
TRACER.format("Writing fromIndex: {0}", fromIndex); //$NON-NLS-1$
}
int diffIndex = accessIndex - fetchIndex;
out.writeInt(fromIndex - diffIndex);
if (TRACER.isEnabled())
{
TRACER.format("Writing toIndex: {0}", toIndex); //$NON-NLS-1$
}
out.writeInt(toIndex - diffIndex);
}
@Override
protected Object confirming(CDODataInput in) throws IOException
{
CDOType type = CDOModelUtil.getType(feature.getEType());
Object accessID = null;
MoveableList<Object> list = revision.getList(feature);
for (int i = fromIndex; i <= toIndex; i++)
{
Object value = type.readValue(in);
list.set(i, value);
if (i == accessIndex)
{
accessID = value;
}
}
return accessID;
}
}
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