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/**
* Copyright (c) 2004 - 2010 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.server.internal.net4j.protocol;
import org.eclipse.emf.cdo.common.id.CDOID;
import org.eclipse.emf.cdo.common.protocol.CDODataInput;
import org.eclipse.emf.cdo.common.protocol.CDODataOutput;
import org.eclipse.emf.cdo.common.protocol.CDOProtocolConstants;
import org.eclipse.emf.cdo.common.util.CDOQueryInfo;
import org.eclipse.emf.cdo.internal.common.CDOQueryInfoImpl;
import org.eclipse.emf.cdo.server.internal.net4j.bundle.OM;
import org.eclipse.emf.cdo.spi.server.InternalQueryManager;
import org.eclipse.emf.cdo.spi.server.InternalQueryResult;
import org.eclipse.emf.cdo.spi.server.InternalView;
import org.eclipse.net4j.util.om.trace.ContextTracer;
import org.eclipse.emf.ecore.EReference;
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 boolean xrefs;
private InternalQueryResult queryResult;
public QueryIndication(CDOServerProtocol protocol)
{
super(protocol, CDOProtocolConstants.SIGNAL_QUERY);
}
@Override
protected void indicating(CDODataInput in) throws IOException
{
int viewID = in.readInt();
InternalView view = getSession().getView(viewID);
CDOQueryInfo queryInfo = new CDOQueryInfoImpl(in);
xrefs = queryInfo.getQueryLanguage().equals(CDOProtocolConstants.QUERY_LANGUAGE_XREFS);
InternalQueryManager queryManager = getRepository().getQueryManager();
queryResult = queryManager.execute(view, queryInfo);
}
@Override
protected void responding(CDODataOutput out) throws IOException
{
// Return queryID immediately.
out.writeInt(queryResult.getQueryID());
flush();
int numberOfResults = 0;
while (queryResult.hasNext())
{
Object object = queryResult.next();
// Object to return
numberOfResults++;
out.writeBoolean(true);
if (xrefs)
{
Object[] values = (Object[])object;
CDOID targetID = (CDOID)values[0];
CDOID sourceID = (CDOID)values[1];
EReference sourceReference = (EReference)values[2];
int sourceIndex = (Integer)values[3];
out.writeCDOID(targetID);
out.writeCDOID(sourceID);
out.writeCDOClassifierRef(sourceReference.getEContainingClass());
out.writeString(sourceReference.getName());
out.writeInt(sourceIndex);
}
else
{
out.writeCDORevisionOrPrimitive(object);
}
if (queryResult.peek() == null)
{
flush();
}
}
if (TRACER.isEnabled())
{
TRACER.trace("Query returned " + numberOfResults + " results"); //$NON-NLS-1$ //$NON-NLS-2$
}
// Query is done successfully
out.writeBoolean(false);
}
}
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