package org.roxgt.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.EClass;
import org.eclipse.emf.ecore.EObject;
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;
import org.roxgt.Edge;
import org.roxgt.Graph;
import org.roxgt.Node;
import org.roxgt.RoxgtFactory;
import org.roxgt.RoxgtPackage;
import org.roxgt.diagram.edit.policies.RoxgtBaseItemSemanticEditPolicy;
/**
* @generated
*/
public class EdgeTargetCreateCommand extends CreateElementCommand {
/**
* @generated
*/
private final EObject source;
/**
* @generated
*/
private final EObject target;
/**
* @generated
*/
private Graph container;
/**
* @generated
*/
public EdgeTargetCreateCommand(CreateRelationshipRequest request,
EObject source, EObject target) {
super(request);
this.source = source;
this.target = target;
if (request.getContainmentFeature() == null) {
setContainmentFeature(RoxgtPackage.eINSTANCE.getGraph_Edges());
}
// 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 Graph) {
container = (Graph) element;
super.setElementToEdit(container);
break;
}
}
}
/**
* @generated
*/
public boolean canExecute() {
if (source == null && target == null) {
return false;
}
if (source != null && !(source instanceof Node)) {
return false;
}
if (target != null && !(target instanceof Node)) {
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 RoxgtBaseItemSemanticEditPolicy.LinkConstraints
.canCreateEdge_3001(getContainer(), getSource(), getTarget());
}
/**
* @generated
*/
protected EObject doDefaultElementCreation() {
// org.roxgt.Edge newElement = (org.roxgt.Edge) super.doDefaultElementCreation();
Edge newElement = RoxgtFactory.eINSTANCE.createEdge();
getContainer().getEdges().add(newElement);
newElement.setSource(getSource());
newElement.setTarget(getTarget());
return newElement;
}
/**
* @generated
*/
protected EClass getEClassToEdit() {
return RoxgtPackage.eINSTANCE.getGraph();
}
/**
* @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 Node getSource() {
return (Node) source;
}
/**
* @generated
*/
protected Node getTarget() {
return (Node) target;
}
/**
* @generated
*/
public Graph getContainer() {
return container;
}
}