package org.eclipse.gmf.examples.mindmap.rcp.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.examples.mindmap.Map;
import org.eclipse.gmf.examples.mindmap.MindmapFactory;
import org.eclipse.gmf.examples.mindmap.MindmapPackage;
import org.eclipse.gmf.examples.mindmap.Relationship;
import org.eclipse.gmf.examples.mindmap.Topic;
import org.eclipse.gmf.examples.mindmap.rcp.diagram.edit.policies.MindmapBaseItemSemanticEditPolicy;
import org.eclipse.gmf.examples.mindmap.rcp.diagram.providers.MindmapElementTypes;
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 RelationshipCreateCommand extends CreateElementCommand {
/**
* @generated
*/
private final EObject source;
/**
* @generated
*/
private final EObject target;
/**
* @generated
*/
private Map container;
/**
* @generated
*/
public RelationshipCreateCommand(CreateRelationshipRequest request,
EObject source, EObject target) {
super(request);
this.source = source;
this.target = target;
if (request.getContainmentFeature() == null) {
setContainmentFeature(MindmapPackage.eINSTANCE.getMap_Relations());
}
// 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 Map) {
container = (Map) element;
super.setElementToEdit(container);
break;
}
}
}
/**
* @generated
*/
public boolean canExecute() {
if (source == null && target == null) {
return false;
}
if (source != null && !(source instanceof Topic)) {
return false;
}
if (target != null && !(target instanceof Topic)) {
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 MindmapBaseItemSemanticEditPolicy.LinkConstraints
.canCreateRelationship_4004(getContainer(), getSource(),
getTarget());
}
/**
* @generated
*/
protected EObject doDefaultElementCreation() {
// org.eclipse.gmf.examples.mindmap.Relationship newElement = (org.eclipse.gmf.examples.mindmap.Relationship) super.doDefaultElementCreation();
Relationship newElement = MindmapFactory.eINSTANCE.createRelationship();
getContainer().getRelations().add(newElement);
newElement.setSource(getSource());
newElement.setTarget(getTarget());
MindmapElementTypes.Initializers.Relationship_4004.init(newElement);
return newElement;
}
/**
* @generated
*/
protected EClass getEClassToEdit() {
return MindmapPackage.eINSTANCE.getMap();
}
/**
* @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 Topic getSource() {
return (Topic) source;
}
/**
* @generated
*/
protected Topic getTarget() {
return (Topic) target;
}
/**
* @generated
*/
public Map getContainer() {
return container;
}
}