/*
* Copyright (c) 2006, 2007 Borland Software Corporation
*
* 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:
* Dmitry Stadnik (Borland) - initial API and implementation
*/
package org.eclipse.gmf.examples.taipan.gmf.editor.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.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.gmf.examples.taipan.Aquatory;
import org.eclipse.gmf.examples.taipan.Destination;
import org.eclipse.gmf.examples.taipan.Route;
import org.eclipse.gmf.examples.taipan.TaiPanFactory;
import org.eclipse.gmf.examples.taipan.TaiPanPackage;
import org.eclipse.gmf.examples.taipan.gmf.editor.edit.policies.TaiPanBaseItemSemanticEditPolicy;
import org.eclipse.gmf.examples.taipan.gmf.editor.providers.TaiPanElementTypes;
import org.eclipse.gmf.runtime.common.core.command.CommandResult;
import org.eclipse.gmf.runtime.emf.type.core.commands.CreateElementCommand;
import org.eclipse.gmf.runtime.emf.type.core.requests.ConfigureRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.CreateRelationshipRequest;
/**
* @generated
*/
public class UnreliableRouteCreateCommand extends CreateElementCommand {
/**
* @generated
*/
private final EObject source;
/**
* @generated
*/
private final EObject target;
/**
* @generated
*/
private final Aquatory container;
/**
* @generated
*/
public UnreliableRouteCreateCommand(CreateRelationshipRequest request, EObject source, EObject target) {
super(request);
this.source = source;
this.target = target;
if (request.getContainmentFeature() == null) {
setContainmentFeature(TaiPanPackage.eINSTANCE.getAquatory_Routes());
}
container = deduceContainer(source, target);
if (container != null) {
super.setElementToEdit(container);
}
}
/**
* @generated
*/
public boolean canExecute() {
if (source == null && target == null) {
return false;
}
if (source != null && false == source instanceof Destination) {
return false;
}
if (target != null && false == target instanceof Destination) {
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 TaiPanBaseItemSemanticEditPolicy.LinkConstraints.canCreateRoute_4003(getContainer(), getSource(), getTarget());
}
/**
* @generated
*/
protected EObject doDefaultElementCreation() {
Route newElement = TaiPanFactory.eINSTANCE.createRoute();
getContainer().getRoutes().add(newElement);
newElement.setSource(getSource());
newElement.setDestination(getTarget());
TaiPanElementTypes.init_Route_4003(newElement);
return newElement;
}
/**
* @generated
*/
protected EClass getEClassToEdit() {
return TaiPanPackage.eINSTANCE.getAquatory();
}
/**
* @generated
*/
protected CommandResult doExecuteWithResult(IProgressMonitor monitor, IAdaptable info) throws ExecutionException {
if (!canExecute()) {
throw new ExecutionException("Invalid arguments in create link command"); //$NON-NLS-1$
}
return super.doExecuteWithResult(monitor, info);
}
/**
* @generated
*/
protected ConfigureRequest createConfigureRequest() {
ConfigureRequest request = super.createConfigureRequest();
request.setParameter(CreateRelationshipRequest.SOURCE, getSource());
request.setParameter(CreateRelationshipRequest.TARGET, getTarget());
return request;
}
/**
* @generated
*/
protected void setElementToEdit(EObject element) {
throw new UnsupportedOperationException();
}
/**
* @generated
*/
protected Destination getSource() {
return (Destination) source;
}
/**
* @generated
*/
protected Destination getTarget() {
return (Destination) target;
}
/**
* @generated
*/
public Aquatory getContainer() {
return container;
}
/**
* Default approach is to traverse ancestors of the source to find instance of container.
* Modify with appropriate logic.
* @generated
*/
private static Aquatory 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 Aquatory) {
return (Aquatory) element;
}
}
return null;
}
}