/*
* Copyright (c) 2012-2016 Marsha Chechik, Alessio Di Sandro, Michalis Famelis,
* Rick Salay.
* 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:
* Alessio Di Sandro - Implementation.
*/
package edu.toronto.cs.se.modelepedia.classdiagram.diagram.edit.commands;
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.ICommand;
import org.eclipse.gmf.runtime.emf.type.core.IElementType;
import org.eclipse.gmf.runtime.emf.type.core.commands.EditElementCommand;
import org.eclipse.gmf.runtime.emf.type.core.requests.ConfigureRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.CreateElementRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.CreateRelationshipRequest;
import edu.toronto.cs.se.modelepedia.classdiagram.Association;
import edu.toronto.cs.se.modelepedia.classdiagram.Class;
import edu.toronto.cs.se.modelepedia.classdiagram.ClassDiagram;
import edu.toronto.cs.se.modelepedia.classdiagram.ClassDiagramFactory;
import edu.toronto.cs.se.modelepedia.classdiagram.diagram.edit.policies.ClassDiagramBaseItemSemanticEditPolicy;
/**
* @generated
*/
public class AssociationCreateCommand extends EditElementCommand {
/**
* @generated
*/
private final EObject source;
/**
* @generated
*/
private final EObject target;
/**
* @generated
*/
private final ClassDiagram container;
/**
* @generated
*/
public AssociationCreateCommand(CreateRelationshipRequest request, EObject source, EObject target) {
super(request.getLabel(), null, request);
this.source = source;
this.target = target;
container = deduceContainer(source, target);
}
/**
* @generated
*/
public boolean canExecute() {
if (source == null && target == null) {
return false;
}
if (source != null && false == source instanceof Class) {
return false;
}
if (target != null && false == target instanceof Class) {
return false;
}
if (getSource() == null) {
return true; // link creation is in progress; source is not defined yet
}
// target may be null here but it's possible to check constraint
if (getContainer() == null) {
return false;
}
return ClassDiagramBaseItemSemanticEditPolicy
.getLinkConstraints()
.canCreateAssociation_4001(getContainer(), getSource(), getTarget());
}
/**
* @generated
*/
protected CommandResult doExecuteWithResult(IProgressMonitor monitor, IAdaptable info) throws ExecutionException {
if (!canExecute()) {
throw new ExecutionException("Invalid arguments in create link command"); //$NON-NLS-1$
}
Association newElement = ClassDiagramFactory.eINSTANCE.createAssociation();
getContainer().getAssociations().add(newElement);
newElement.setSource(getSource());
newElement.setTarget(getTarget());
doConfigure(newElement, monitor, info);
((CreateElementRequest) getRequest()).setNewElement(newElement);
return CommandResult.newOKCommandResult(newElement);
}
/**
* @generated
*/
protected void doConfigure(Association newElement, IProgressMonitor monitor, IAdaptable info)
throws ExecutionException {
IElementType elementType = ((CreateElementRequest) getRequest()).getElementType();
ConfigureRequest configureRequest = new ConfigureRequest(getEditingDomain(), newElement, elementType);
configureRequest.setClientContext(((CreateElementRequest) getRequest()).getClientContext());
configureRequest.addParameters(getRequest().getParameters());
configureRequest.setParameter(CreateRelationshipRequest.SOURCE, getSource());
configureRequest.setParameter(CreateRelationshipRequest.TARGET, getTarget());
ICommand configureCommand = elementType.getEditCommand(configureRequest);
if (configureCommand != null && configureCommand.canExecute()) {
configureCommand.execute(monitor, info);
}
}
/**
* @generated
*/
protected void setElementToEdit(EObject element) {
throw new UnsupportedOperationException();
}
/**
* @generated
*/
protected Class getSource() {
return (Class) source;
}
/**
* @generated
*/
protected Class getTarget() {
return (Class) target;
}
/**
* @generated
*/
public ClassDiagram getContainer() {
return container;
}
/**
* Default approach is to traverse ancestors of the source to find instance of container.
* Modify with appropriate logic.
* @generated
*/
private static ClassDiagram deduceContainer(EObject source, EObject target) {
// 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 = source; element != null; element = element.eContainer()) {
if (element instanceof ClassDiagram) {
return (ClassDiagram) element;
}
}
return null;
}
}