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/*****************************************************************************
* Copyright (c) 2011-2012, 2019 CEA LIST.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* CEA LIST - Initial API and implementation
* Nicolas FAUVERGUE (CEA LIST) nicolas.fauvergue@cea.fr - Bug 494514
*
*****************************************************************************/
package org.eclipse.papyrus.uml.service.types.helper;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.gmf.runtime.common.core.command.CommandResult;
import org.eclipse.gmf.runtime.common.core.command.CompositeCommand;
import org.eclipse.gmf.runtime.common.core.command.ICommand;
import org.eclipse.gmf.runtime.common.core.command.IdentityCommand;
import org.eclipse.gmf.runtime.common.core.command.UnexecutableCommand;
import org.eclipse.gmf.runtime.emf.type.core.commands.ConfigureElementCommand;
import org.eclipse.gmf.runtime.emf.type.core.commands.CreateRelationshipCommand;
import org.eclipse.gmf.runtime.emf.type.core.commands.SetValueCommand;
import org.eclipse.gmf.runtime.emf.type.core.requests.ConfigureRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.CreateRelationshipRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.ReorientRelationshipRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.SetRequest;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.papyrus.uml.service.types.command.ControlFlowReorientCommand;
import org.eclipse.papyrus.uml.service.types.utils.RequestParameterUtils;
import org.eclipse.papyrus.uml.tools.utils.ActivityEdgeUtil;
import org.eclipse.papyrus.uml.tools.utils.ControlFlowUtil;
import org.eclipse.uml2.uml.ActivityNode;
import org.eclipse.uml2.uml.ActivityPartition;
import org.eclipse.uml2.uml.ControlFlow;
import org.eclipse.uml2.uml.Element;
import org.eclipse.uml2.uml.UMLPackage;
/**
* Edit helper class for binary {@link ControlFlow}
*/
public class ControlFlowEditHelper extends ElementEditHelper {
/**
* {@inheritDoc}
*/
@Override
protected ICommand getReorientRelationshipCommand(ReorientRelationshipRequest req) {
ICommand resultCommand = new ControlFlowReorientCommand(req);
// Get the control flow
final ControlFlow controlFlow = (ControlFlow) req.getRelationship();
// Get if this is a source re-orient or the target
final boolean isReorientSource = req.getDirection() == ReorientRelationshipRequest.REORIENT_SOURCE;
// Get the source and target from controlFlow and request for needed one
final Object source = isReorientSource ? req.getNewRelationshipEnd() : controlFlow.getSource();
final Object target = isReorientSource ? controlFlow.getTarget() : req.getNewRelationshipEnd();
if ((null == source || source instanceof ActivityNode) && (null == target || target instanceof ActivityNode)) {
// Get the command to update the InPartition feature
final ICommand updatePartitionsCommand = getInPartitionUpdateCommand(controlFlow, (ActivityNode) source, (ActivityNode) target);
if (null != updatePartitionsCommand) {
resultCommand = CompositeCommand.compose(resultCommand, updatePartitionsCommand);
}
}
return resultCommand;
}
/**
* Test if the relationship creation is allowed.
*
* @param source
* the relationship source can be null
* @param target
* the relationship target can be null
* @param sourceView
* the relationship graphical source can be null
* @param targetView
* the relationship graphical target can be null
* @return true if the creation is allowed
*/
protected boolean canCreate(EObject source, EObject target, View sourceView, View targetView) {
return canCreate(source, target);
}
/**
* {@inheritDoc}
*/
@Override
protected ICommand getCreateRelationshipCommand(CreateRelationshipRequest req) {
EObject source = req.getSource();
EObject target = req.getTarget();
boolean noSourceOrTarget = (source == null || target == null);
boolean noSourceAndTarget = (source == null && target == null);
if (!noSourceAndTarget && !canCreate(source, target, RequestParameterUtils.getSourceView(req), RequestParameterUtils.getTargetView(req))) {
// Abort creation.
return UnexecutableCommand.INSTANCE;
}
if (noSourceOrTarget && !noSourceAndTarget) {
// The request isn't complete yet. Return the identity command so
// that the create relationship gesture is enabled.
// this can be before first creation => check the source
if (source != null && !(source instanceof ActivityNode)) {
return UnexecutableCommand.INSTANCE;
}
return IdentityCommand.INSTANCE;
}
// Propose a semantic container for the new control flow.
Element proposedContainer = deduceContainer(req);
if (proposedContainer == null) {
return UnexecutableCommand.INSTANCE;
}
req.setContainer(proposedContainer);
return new CreateRelationshipCommand(req);
}
protected Element deduceContainer(CreateRelationshipRequest request) {
return ActivityEdgeUtil.deduceContainer(request.getSource(), request.getTarget());
}
/**
* {@inheritDoc}
*/
@Override
protected ICommand getConfigureCommand(final ConfigureRequest req) {
ICommand configureCommand = new ConfigureElementCommand(req) {
@Override
protected CommandResult doExecuteWithResult(IProgressMonitor progressMonitor, IAdaptable info) throws ExecutionException {
ControlFlow element = (ControlFlow) req.getElementToConfigure();
ActivityNode source = getSourceObject(req);
ActivityNode target = getTargetObject(req);
if (source != null) {
element.setSource(getSourceObject(req));
}
if (target != null) {
element.setTarget(target);
}
// Manage InPartitions
if (null != source && null != target) {
// Get the source InPartitions
final List<ActivityPartition> partitions = new ArrayList<>(source.getInPartitions());
// Keep the InPartitions contained in the source and target to add it into the control flow
partitions.retainAll(target.getInPartitions());
element.getInPartitions().addAll(partitions);
}
return CommandResult.newOKCommandResult(element);
}
};
return CompositeCommand.compose(configureCommand, super.getConfigureCommand(req));
}
/**
* This method provides the object to be use as source.
*
* @return the source value
*/
protected ActivityNode getSourceObject(ConfigureRequest req) {
Object result = req.getParameter(CreateRelationshipRequest.SOURCE);
return (result instanceof ActivityNode) ? (ActivityNode) result : null;
}
/**
* This method provides the object to be used as target.
*
* @return the target value
*/
protected ActivityNode getTargetObject(ConfigureRequest req) {
Object result = req.getParameter(CreateRelationshipRequest.TARGET);
return (result instanceof ActivityNode) ? (ActivityNode) result : null;
}
/**
* {@inheritDoc}
*/
protected boolean canCreate(EObject source, EObject target) {
if ((source != null) && !(source instanceof ActivityNode)) {
return false;
}
if ((target != null) && !(target instanceof ActivityNode)) {
return false;
}
Element container = ActivityEdgeUtil.deduceContainer(source, target);
if (container == null) {
return false;
}
return ControlFlowUtil.canExistControlFlow(container, null, (ActivityNode) source, (ActivityNode) target);
}
/**
* This allows to get the command to update the InPartition feature if needed.
*
* @param controlFlow
* The control flow to update.
* @param source
* The source activity node.
* @param target
* The target activity node.
* @return The command to update the InPartition feature (can be <code>null</code>).
*/
protected ICommand getInPartitionUpdateCommand(final ControlFlow controlFlow, final ActivityNode source, final ActivityNode target) {
List<ActivityPartition> partitions = new ArrayList<>();
if (null != source && null != target) {
// Get the source InPartitions
partitions = new ArrayList<>(source.getInPartitions());
// Keep the in partitions contained in the source and target to add it into the control flow
partitions.retainAll(target.getInPartitions());
if (!partitions.isEmpty()) {
return new SetValueCommand(new SetRequest(controlFlow, UMLPackage.eINSTANCE.getActivityEdge_InPartition(), partitions));
}
}
// If the partitions found are empty and the control flow InPartitions are not, clear this
if (partitions.isEmpty() && !controlFlow.getInPartitions().isEmpty()) {
return new SetValueCommand(new SetRequest(controlFlow, UMLPackage.eINSTANCE.getActivityEdge_InPartition(), partitions));
}
return null;
}
}
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