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/*******************************************************************************
* Copyright (c) 2010 THALES GLOBAL SERVICES.
* 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:
* Obeo - initial API and implementation
*******************************************************************************/
package org.eclipse.sirius.diagram.sequence.business.internal.operation;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import org.eclipse.emf.ecore.EAttribute;
import org.eclipse.emf.ecore.EObject;
import com.google.common.base.Function;
import com.google.common.base.Preconditions;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import org.eclipse.sirius.common.tools.api.interpreter.IInterpreter;
import org.eclipse.sirius.common.tools.api.util.StringUtil;
import org.eclipse.sirius.DNode;
import org.eclipse.sirius.business.api.logger.RuntimeLoggerInterpreter;
import org.eclipse.sirius.business.api.logger.RuntimeLoggerManager;
import org.eclipse.sirius.description.DiagramDescription;
import org.eclipse.sirius.diagram.business.internal.operation.AbstractModelChangeOperation;
import org.eclipse.sirius.diagram.sequence.SequenceDDiagram;
import org.eclipse.sirius.diagram.sequence.business.internal.elements.InstanceRole;
import org.eclipse.sirius.diagram.sequence.business.internal.ordering.RefreshOrderingHelper;
import org.eclipse.sirius.diagram.sequence.description.DescriptionPackage;
import org.eclipse.sirius.diagram.sequence.description.SequenceDiagramDescription;
import org.eclipse.sirius.diagram.sequence.ordering.EventEnd;
import org.eclipse.sirius.diagram.sequence.ordering.EventEndsOrdering;
import org.eclipse.sirius.diagram.sequence.ordering.InstanceRolesOrdering;
import org.eclipse.sirius.tools.api.interpreter.InterpreterUtil;
/**
* An operation to re-compute the global semantic orderings of events and
* instance roles in a sequence diagram according to the user-specified
* criteria.
*
* <pre>
* Semantic Model + User-specified Ordering Expression ---> SemanticMessageOrdering
* </pre>
*
* @author pcdavid, smonnier
*/
public class RefreshSemanticOrderingsOperation extends AbstractModelChangeOperation<Void> {
/**
* The name of the variable used to pass event ends to sort to
* user-specified expressions.
*/
private static final String EVENT_ENDS_TO_SORT_VARIABLE = "eventEnds";
private final SequenceDDiagram sequenceDDiagram;
/**
* Constructor.
*
* @param diagram
* the diagram whose semantic ordering should be refreshed.
*/
public RefreshSemanticOrderingsOperation(SequenceDDiagram diagram) {
super("Refresh semantic ordering");
this.sequenceDDiagram = Preconditions.checkNotNull(diagram);
}
/**
* {@inheritDoc}
*/
@Override
public Void execute() {
EventEndsOrdering semanticOrdering = sequenceDDiagram.getSemanticOrdering();
if (semanticOrdering != null) {
refreshGlobalOrdering(semanticOrdering);
}
InstanceRolesOrdering irSemanticOrdering = sequenceDDiagram.getInstanceRoleSemanticOrdering();
if (semanticOrdering != null) {
refreshGlobalOrdering(irSemanticOrdering);
}
return null;
}
/**
* Refreshes the semantic ordering of all the events in the diagram.
* <p>
* {@inheritDoc}
*/
private void refreshGlobalOrdering(EventEndsOrdering semanticOrdering) {
Iterable<? extends EventEnd> allEnds = RefreshOrderingHelper.getAllEventEnds(sequenceDDiagram);
RefreshOrderingHelper.updateIfNeeded(semanticOrdering.getEventEnds(), computeEventEndsOrdering(semanticOrdering, allEnds));
}
private List<EventEnd> computeEventEndsOrdering(EventEndsOrdering semanticOrdering, Iterable<? extends EventEnd> allEnds) {
Map<EObject, EventEnd> index = Maps.newHashMap();
for (EventEnd eventEnd : allEnds) {
index.put(eventEnd.getSemanticEnd(), eventEnd);
}
Iterable<EObject> semanticEnds = Iterables.transform(allEnds, new Function<EventEnd, EObject>() {
public EObject apply(EventEnd from) {
return from.getSemanticEnd();
}
});
List<EObject> orderedSemanticEnds = computeOrdering(semanticEnds, DescriptionPackage.eINSTANCE.getSequenceDiagramDescription_EndsOrdering(), true);
List<EventEnd> result = new ArrayList<EventEnd>();
for (EObject semanticEnd : orderedSemanticEnds) {
EventEnd ee = index.get(semanticEnd);
if (ee != null) {
result.add(ee);
}
}
return result;
}
/**
* Refreshes the semantic ordering of all the instance roles in the diagram.
*/
private void refreshGlobalOrdering(InstanceRolesOrdering semanticOrdering) {
Iterable<? extends DNode> allInstanceRoles = Iterables.filter(sequenceDDiagram.getNodes(), InstanceRole.viewpointElementPredicate());
RefreshOrderingHelper.updateIfNeeded(semanticOrdering.getSemanticInstanceRoles(), computeInstanceRolesOrdering(semanticOrdering, allInstanceRoles));
}
private List<EObject> computeInstanceRolesOrdering(InstanceRolesOrdering semanticOrdering, Iterable<? extends DNode> allInstanceRoles) {
List<EObject> semanticInstanceRoles = Lists.newArrayList();
for (DNode node : allInstanceRoles) {
semanticInstanceRoles.add(node.getTarget());
}
List<EObject> orderedSemanticEnds = computeOrdering(semanticInstanceRoles, DescriptionPackage.eINSTANCE.getSequenceDiagramDescription_InstanceRolesOrdering(), false);
return orderedSemanticEnds;
}
private List<EObject> computeOrdering(Iterable<EObject> semanticEnds, EAttribute expressionAttribute, boolean declareEventEndsVariable) {
if (StringUtil.isEmpty((String) getSequenceDescription().eGet(expressionAttribute))) {
return Lists.newArrayList(semanticEnds);
}
final IInterpreter interpreter = InterpreterUtil.getInterpreter(sequenceDDiagram);
if (declareEventEndsVariable) {
interpreter.setVariable(EVENT_ENDS_TO_SORT_VARIABLE, Lists.newArrayList(semanticEnds));
}
try {
RuntimeLoggerInterpreter loggerInterpreter = RuntimeLoggerManager.INSTANCE.decorate(interpreter);
Collection<EObject> result = loggerInterpreter.evaluateCollection(sequenceDDiagram.getTarget(), getSequenceDescription(), expressionAttribute);
return Lists.newArrayList(result);
} finally {
if (declareEventEndsVariable) {
interpreter.unSetVariable(EVENT_ENDS_TO_SORT_VARIABLE);
}
}
}
private SequenceDiagramDescription getSequenceDescription() {
if (sequenceDDiagram != null) {
DiagramDescription desc = sequenceDDiagram.getDescription();
return SequenceDiagramDescription.class.cast(desc);
} else {
return null;
}
}
}
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