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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.emf.ecore.EObject;
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.core.util.EMFCoreUtil;
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.Diagram;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.papyrus.uml.service.types.command.AssociationReorientCommand;
import org.eclipse.papyrus.uml.service.types.utils.RequestParameterConstants;
import org.eclipse.uml2.uml.Classifier;
import org.eclipse.uml2.uml.UMLPackage;
/**
* Edit helper class for binary {@link Association}
*/
public class AssociationBaseEditHelper extends ElementEditHelper {
/**
* {@inheritDoc}
*/
@Override
protected ICommand getReorientRelationshipCommand(ReorientRelationshipRequest req) {
return new AssociationReorientCommand(req);
}
/**
* This method provides the source type provided as {@link ConfigureRequest} parameter.
*
* @return the target role
*/
private Classifier getSourceOwnerType(ConfigureRequest req) {
Classifier result = null;
Object paramObject = req.getParameter(CreateRelationshipRequest.SOURCE);
if(paramObject instanceof Classifier) {
result = (Classifier)paramObject;
}
return result;
}
/**
* This method provides the target type provided as {@link ConfigureRequest} parameter.
*
* @return the target role
*/
private Classifier getTargetOwnerType(ConfigureRequest req) {
Classifier result = null;
Object paramObject = req.getParameter(CreateRelationshipRequest.TARGET);
if(paramObject instanceof Classifier) {
result = (Classifier)paramObject;
}
return result;
}
/**
* Test if the relationship creation is allowed.
*
* @param source
* the relationship source can be null
* @param target
* the relationship target can be null
* @return true if the creation is allowed
*/
protected boolean canCreate(EObject source, EObject target) {
if((source != null) && !(source instanceof Classifier)) {
return false;
}
if((target != null) && !(target instanceof Classifier)) {
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)) {
// 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.
return IdentityCommand.INSTANCE;
}
// Propose a container if none is set in request.
//EObject proposedContainer = EMFCoreUtil.getLeastCommonContainer(Arrays.asList(new EObject[]{ source, target }), UMLPackage.eINSTANCE.getPackage());
View sourceView = (View)req.getParameter(RequestParameterConstants.EDGE_CREATE_REQUEST_SOURCE_VIEW);
if (sourceView != null) {
Diagram diagram = sourceView.getDiagram();
EObject proposedContainer = EMFCoreUtil.getContainer(diagram.getElement(), UMLPackage.Literals.PACKAGE);
req.setContainer(proposedContainer);
}
return new CreateRelationshipCommand(req);
}
/**
* {@inheritDoc}
*/
@Override
protected ICommand getConfigureCommand(final ConfigureRequest req) {
// All Association configure are managed by HelperAdvice(s).
if((getSourceOwnerType(req) == null) || (getTargetOwnerType(req) == null)) {
return UnexecutableCommand.INSTANCE;
}
return super.getConfigureCommand(req);
}
}
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