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/*****************************************************************************
* Copyright (c) 2018 Christian W. Damus 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:
* Christian W. Damus - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.uml.service.types.helper.advice;
import static org.eclipse.gmf.runtime.common.core.command.CompositeCommand.compose;
import java.util.Optional;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.gmf.runtime.common.core.command.ICommand;
import org.eclipse.gmf.runtime.emf.type.core.edithelper.AbstractEditHelperAdvice;
import org.eclipse.gmf.runtime.emf.type.core.requests.DestroyElementRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.IEditCommandRequest;
import org.eclipse.uml2.uml.GeneralOrdering;
import org.eclipse.uml2.uml.Interaction;
import org.eclipse.uml2.uml.InteractionFragment;
import org.eclipse.uml2.uml.InteractionOperand;
/**
* Edit-helper advice for elements that own {@link InteractionFragment}s, being
* {@link Interaction}s and {@link InteractionOperand}s.
*
* @since 4.0
*/
public class InteractionFragmentContainerEditHelperAdvice extends AbstractEditHelperAdvice {
/**
* Initializes me.
*/
public InteractionFragmentContainerEditHelperAdvice() {
super();
}
/**
* In the case of a contained {@link InteractionFragment} to be destroyed, we don't
* actually destroy it but just re-assign it to the containing {@link Interaction}
* or {@link InteractionOperand}, unless that container also is being destroyed, in
* which case we bump up the containment at most to the root {@link Interaction}.
* If that {@link Interaction} also is being destroyed, then we just destroy the
* fragment because the entire content of the interaction is being destroyed.
*/
@Override
protected ICommand getBeforeDestroyElementCommand(DestroyElementRequest req) {
ICommand superResult = super.getBeforeDestroyElementCommand(req);
// If it's a combined fragment, record that it's being deleted
InteractionContainerDeletionContext.deleting(req);
EObject elementToDestroy = req.getElementToDestroy();
Optional<ICommand> result = Optional.empty();
if (elementToDestroy instanceof InteractionFragment) {
InteractionFragment fragment = (InteractionFragment) elementToDestroy;
Optional<InteractionContainerDeletionContext> context = InteractionContainerDeletionContext.get(req);
result = context.map(ctx -> ctx.getDestroyCommand(fragment));
} else if (elementToDestroy instanceof GeneralOrdering) {
GeneralOrdering generalOrdering = (GeneralOrdering) elementToDestroy;
Optional<InteractionContainerDeletionContext> context = InteractionContainerDeletionContext.get(req);
result = context.map(ctx -> ctx.getDestroyCommand(generalOrdering));
}
// If we have an advice command, it should replace the 'instead' command
result.ifPresent(advice -> instead(req, advice));
return result.map(advice -> compose(superResult, advice)).orElse(superResult);
}
ICommand instead(IEditCommandRequest request, ICommand instead) {
request.setParameter(IEditCommandRequest.REPLACE_DEFAULT_COMMAND, Boolean.TRUE);
return instead;
}
@Override
protected ICommand getAfterDestroyElementCommand(DestroyElementRequest request) {
// In case I replaced the default command, don't propagate that parameter
// to any destroy-dependents requests
request.getParameters().remove(IEditCommandRequest.REPLACE_DEFAULT_COMMAND);
return super.getAfterDestroyElementCommand(request);
}
}
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