| package org.eclipse.gmf.tooling.examples.linklf.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 org.eclipse.gmf.tooling.examples.linklf.CanvasElementContainer; |
| import org.eclipse.gmf.tooling.examples.linklf.LabeledLink; |
| import org.eclipse.gmf.tooling.examples.linklf.LinklfFactory; |
| import org.eclipse.gmf.tooling.examples.linklf.Node; |
| import org.eclipse.gmf.tooling.examples.linklf.diagram.edit.policies.LinklfBaseItemSemanticEditPolicy; |
| |
| /** |
| * @generated |
| */ |
| public class LabeledLinkCreateCommand extends EditElementCommand { |
| |
| /** |
| * @generated |
| */ |
| private final EObject source; |
| |
| /** |
| * @generated |
| */ |
| private final EObject target; |
| |
| /** |
| * @generated |
| */ |
| private final CanvasElementContainer container; |
| |
| /** |
| * @generated |
| */ |
| public LabeledLinkCreateCommand(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 Node) { |
| return false; |
| } |
| if (target != null && false == 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 LinklfBaseItemSemanticEditPolicy.getLinkConstraints().canCreateLabeledLink_4002(getContainer(), getSource(), getTarget()); |
| } |
| |
| /** |
| * @generated |
| */ |
| protected CommandResult doExecuteWithResult(IProgressMonitor monitor, IAdaptable info) throws ExecutionException { |
| if (!canExecute()) { |
| throw new ExecutionException("Invalid arguments in create link command"); //$NON-NLS-1$ |
| } |
| |
| LabeledLink newElement = LinklfFactory.eINSTANCE.createLabeledLink(); |
| getContainer().getElements().add(newElement); |
| newElement.setSource(getSource()); |
| newElement.setTarget(getTarget()); |
| doConfigure(newElement, monitor, info); |
| ((CreateElementRequest) getRequest()).setNewElement(newElement); |
| return CommandResult.newOKCommandResult(newElement); |
| |
| } |
| |
| /** |
| * @generated |
| */ |
| protected void doConfigure(LabeledLink 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 Node getSource() { |
| return (Node) source; |
| } |
| |
| /** |
| * @generated |
| */ |
| protected Node getTarget() { |
| return (Node) target; |
| } |
| |
| /** |
| * @generated |
| */ |
| public CanvasElementContainer getContainer() { |
| return container; |
| } |
| |
| /** |
| * Default approach is to traverse ancestors of the source to find instance of container. |
| * Modify with appropriate logic. |
| * @generated |
| */ |
| private static CanvasElementContainer 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 CanvasElementContainer) { |
| return (CanvasElementContainer) element; |
| } |
| } |
| return null; |
| } |
| |
| } |