| /*************************************************************************** |
| * 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.common.CDODataInput; |
| import org.eclipse.emf.cdo.common.CDODataOutput; |
| import org.eclipse.emf.cdo.common.CDOProtocolConstants; |
| import org.eclipse.emf.cdo.common.id.CDOID; |
| import org.eclipse.emf.cdo.spi.common.model.InternalCDOFeature; |
| 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 java.io.IOException; |
| |
| /** |
| * @author Eike Stepper |
| */ |
| public class LoadChunkRequest extends CDOClientRequest<Object> |
| { |
| private static final ContextTracer PROTOCOL_TRACER = new ContextTracer(OM.DEBUG_PROTOCOL, LoadChunkRequest.class); |
| |
| private InternalCDORevision revision; |
| |
| private InternalCDOFeature feature; |
| |
| private int accessIndex; |
| |
| private int fromIndex; |
| |
| private int toIndex; |
| |
| private int fetchIndex; |
| |
| public LoadChunkRequest(CDOClientProtocol protocol, InternalCDORevision revision, InternalCDOFeature 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 (PROTOCOL_TRACER.isEnabled()) |
| { |
| PROTOCOL_TRACER.format("Writing revision ID: {0}", id); |
| } |
| |
| out.writeCDOID(id); |
| int version = revision.getVersion(); |
| if (revision.isTransactional()) |
| { |
| --version; |
| } |
| |
| if (PROTOCOL_TRACER.isEnabled()) |
| { |
| PROTOCOL_TRACER.format("Writing revision version: {0}", version); |
| } |
| |
| out.writeInt(version); |
| if (PROTOCOL_TRACER.isEnabled()) |
| { |
| PROTOCOL_TRACER.format("Writing feature: {0}", feature); |
| } |
| |
| out.writeCDOClassRef(feature.getContainingClass()); |
| out.writeInt(feature.getFeatureIndex()); |
| if (PROTOCOL_TRACER.isEnabled()) |
| { |
| PROTOCOL_TRACER.format("Writing fromIndex: {0}", fromIndex); |
| } |
| int diffIndex = accessIndex - fetchIndex; |
| out.writeInt(fromIndex - diffIndex); |
| if (PROTOCOL_TRACER.isEnabled()) |
| { |
| PROTOCOL_TRACER.format("Writing toIndex: {0}", toIndex); |
| } |
| |
| out.writeInt(toIndex - diffIndex); |
| } |
| |
| @Override |
| protected Object confirming(CDODataInput in) throws IOException |
| { |
| Object accessID = null; |
| MoveableList<Object> list = revision.getList(feature); |
| for (int i = fromIndex; i <= toIndex; i++) |
| { |
| Object value = feature.getType().readValue(in); |
| list.set(i, value); |
| if (i == accessIndex) |
| { |
| accessID = value; |
| } |
| } |
| |
| return accessID; |
| } |
| } |