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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:
* Simon McDuff - initial API and implementation
* Eike Stepper - maintenance
**************************************************************************/
package org.eclipse.emf.cdo.internal.server.protocol;
import org.eclipse.emf.cdo.common.CDOQueryInfo;
import org.eclipse.emf.cdo.common.io.CDODataInput;
import org.eclipse.emf.cdo.common.io.CDODataOutput;
import org.eclipse.emf.cdo.common.protocol.CDOProtocolConstants;
import org.eclipse.emf.cdo.internal.common.CDOQueryInfoImpl;
import org.eclipse.emf.cdo.internal.server.QueryManager;
import org.eclipse.emf.cdo.internal.server.QueryResult;
import org.eclipse.emf.cdo.internal.server.bundle.OM;
import org.eclipse.emf.cdo.server.IView;
import org.eclipse.net4j.util.om.trace.ContextTracer;
import java.io.IOException;
/**
* @author Simon McDuff
*/
public class QueryIndication extends CDOReadIndication
{
private static final ContextTracer TRACER = new ContextTracer(OM.DEBUG_PROTOCOL, QueryIndication.class);
private QueryResult queryResult;
public QueryIndication(CDOServerProtocol protocol)
{
super(protocol, CDOProtocolConstants.SIGNAL_QUERY);
}
@Override
protected void indicating(CDODataInput in) throws IOException
{
int viewID = in.readInt();
CDOQueryInfo cdoQuery = new CDOQueryInfoImpl(in); // TODO Add CDODataInput.readCDOQueryInfo()
IView view = getSession().getView(viewID);
QueryManager queryManager = getRepository().getQueryManager();
queryResult = queryManager.execute(view, cdoQuery);
}
@Override
protected void responding(CDODataOutput out) throws IOException
{
int numberOfResults = 0;
// Return queryID immediately.
out.writeInt(queryResult.getQueryID());
flush();
while (queryResult.hasNext())
{
Object object = queryResult.next();
// Object to return
numberOfResults++;
out.writeBoolean(true);
out.writeCDORevisionOrPrimitive(object);
if (queryResult.peek() == null)
{
flush();
}
}
if (TRACER.isEnabled())
{
TRACER.trace("Query had " + numberOfResults + " objects return");
}
// Query is done successfully
out.writeBoolean(false);
}
}
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