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/*****************************************************************************
* Copyright (c) 2011-2012 CEA LIST.
*
* 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:
*
* CEA LIST - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.uml.service.types.helper;
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.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.notation.View;
import org.eclipse.papyrus.uml.service.types.command.ExceptionHandlerReorientCommand;
import org.eclipse.papyrus.uml.service.types.utils.RequestParameterUtils;
import org.eclipse.uml2.uml.ActivityNode;
import org.eclipse.uml2.uml.ExceptionHandler;
import org.eclipse.uml2.uml.ExecutableNode;
import org.eclipse.uml2.uml.ObjectNode;
import org.eclipse.uml2.uml.Type;
/**
* Edit helper class for binary {@link ExceptionHandler}
*/
public class ExceptionHandlerEditHelper extends ElementEditHelper {
/**
* {@inheritDoc}
*/
@Override
protected ICommand getReorientRelationshipCommand(ReorientRelationshipRequest req) {
return new ExceptionHandlerReorientCommand(req);
}
/**
* 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) {
if((source != null) && !(source instanceof ActivityNode)) {
return false;
}
if((target != null) && !(target instanceof ActivityNode)) {
return false;
}
return true;
}
/**
* {@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.
if(source != null && !(source instanceof ExecutableNode)) {
return UnexecutableCommand.INSTANCE;
}
return IdentityCommand.INSTANCE;
}
// Propose a semantic container for the new Exception Handler.
ExecutableNode proposedContainer = deduceContainer(req);
if(proposedContainer == null) {
return UnexecutableCommand.INSTANCE;
}
req.setContainer(proposedContainer);
return new CreateRelationshipCommand(req);
}
/**
* Default approach is to traverse ancestors of the source to find instance of container.
* Modify with appropriate logic.
*
* @generated
*/
protected ExecutableNode deduceContainer(CreateRelationshipRequest req) {
// Find container element for the new link.
// Climb up by containment hierarchy starting from the source
// and return the first element that is instance of the container class.
for(EObject element = req.getSource(); element != null; element = element.eContainer()) {
if(element instanceof ExecutableNode) {
return (ExecutableNode)element;
}
}
return null;
}
/**
* {@inheritDoc}
*/
@Override
protected ICommand getConfigureCommand(final ConfigureRequest req) {
ICommand configureCommand = new ConfigureElementCommand(req) {
protected CommandResult doExecuteWithResult(IProgressMonitor progressMonitor, IAdaptable info) throws ExecutionException {
ExceptionHandler element = (ExceptionHandler)req.getElementToConfigure();
if(req.getParameter(CreateRelationshipRequest.SOURCE) != null) {
element.setProtectedNode(getSourceObject(req));
}
if(req.getParameter(CreateRelationshipRequest.TARGET) != null) {
element.setExceptionInput(getTargetObject(req));
}
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 (EList or EObject)
*/
protected ExecutableNode getSourceObject(ConfigureRequest req) {
Object result = req.getParameter(CreateRelationshipRequest.SOURCE);
if(result instanceof ExecutableNode) {
return (ExecutableNode)result;
}
return null;
}
/**
* This method provides the object to be used as target.
*
* @return the target value (EList or EObject)
*/
protected ObjectNode getTargetObject(ConfigureRequest req) {
Object result = req.getParameter(CreateRelationshipRequest.TARGET);
if(result instanceof ObjectNode) {
return (ObjectNode)result;
}
return null;
}
}
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