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/***************************************************************************
* Copyright (c) 2004 - 2007 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.internal.cdo.analyzer;
import org.eclipse.emf.cdo.protocol.CDOID;
import org.eclipse.emf.cdo.protocol.analyzer.CDOFetchRule;
import org.eclipse.emf.cdo.protocol.model.CDOClass;
import org.eclipse.emf.cdo.protocol.model.CDOFeature;
import org.eclipse.emf.internal.cdo.InternalCDOObject;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* @author Simon McDuff
*/
public class CDOFeatureAnalyzerUI extends CDOAbstractFeatureRuleAnalyzer
{
private static final long ELAPSE_TIME = 400L;
private Map<CDOClusterOfFetchRule, CDOClusterOfFetchRule> featureRules = new HashMap<CDOClusterOfFetchRule, CDOClusterOfFetchRule>();
private CDOClusterOfFetchRule currentClusterOfFetchRule;
private long maxTimeBetweenOperation;
public CDOFeatureAnalyzerUI()
{
this(ELAPSE_TIME);
}
public CDOFeatureAnalyzerUI(long maxTimeBetweenOperation)
{
this.maxTimeBetweenOperation = maxTimeBetweenOperation;
}
public CDOID getContext()
{
if (this.lastTraverseFeature.isMany())
{
return CDOID.NULL;
}
return lastTraverseCDOObject.cdoID();
}
public synchronized CDOClusterOfFetchRule getFeatureRule(CDOClass cdoClass, CDOFeature cdoFeature)
{
CDOClusterOfFetchRule search = new CDOClusterOfFetchRule(cdoClass, cdoFeature);
CDOClusterOfFetchRule featureRule = featureRules.get(search);
if (featureRule == null)
{
featureRule = search;
featureRules.put(search, featureRule);
}
return featureRule;
}
public List<CDOFetchRule> getFetchRules(Collection<CDOID> ids)
{
boolean addRootFeature = true;
fetchData();
if (lastTraverseFeature.isMany())
{
addRootFeature = false;
}
CDOClusterOfFetchRule search = new CDOClusterOfFetchRule(lastTraverseCDOObject.cdoClass(), lastTraverseFeature);
CDOClusterOfFetchRule fetchOfRule = featureRules.get(search);
if (fetchOfRule == null)
{
return null;
}
Collection<CDOFetchRule> fetchRules = fetchOfRule.getFeatureInfo().getRules(null, null);
List<CDOFetchRule> list = new ArrayList<CDOFetchRule>();
for (CDOFetchRule fetchRule : fetchRules)
{
if (addRootFeature == true || lastTraverseCDOObject.cdoClass() != fetchRule.getCDOClass())
{
list.add(fetchRule);
}
}
return list;
}
@Override
protected void doPreTraverseFeature(InternalCDOObject cdoObject, CDOFeature feature, int index)
{
// Don`t handle containment relationship
if (!feature.isReference())
{
return;
}
if (lastElapseTimeBetweenOperations > maxTimeBetweenOperation || currentClusterOfFetchRule == null)
{
// The user interacted with the UI. Restart a new ClusterOfFetchRule
currentClusterOfFetchRule = getFeatureRule(cdoObject.cdoClass(), feature);
}
}
@Override
protected void doPostTraverseFeature(InternalCDOObject cdoObject, CDOFeature feature, int index, Object object)
{
if (didFetch())
{
currentClusterOfFetchRule.getFeatureInfo().activate(cdoObject.cdoClass(), feature);
}
}
}
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