public class DropObjectEditPolicy extends GraphicalEditPolicy implements EditPolicy {

	public Command getCommand(Request request) {
		if (RequestConstants.REQ_DROP_OBJECTS.equals(request.getType())) {
			DropObjectsRequest dndRequest = (DropObjectsRequest) request;
			return getDropCommand(dndRequest);
		}
		return null;
	}

	private Command getDropCommand(DropObjectsRequest dndRequest) {

		ProcessEditPart editor = (ProcessEditPart) getHost();
		IElementType type = ProcessElementTypes.Activity_2003; // Basic node, can be placed anywhere
		ViewAndElementDescriptor viewDescriptor = new ViewAndElementDescriptor(
				new CreateElementRequestAdapter(new CreateElementRequest(type)),
				Node.class,
				((IHintedType) type).getSemanticHint(),
				editor.getDiagramPreferencesHint());

		CreateViewAndElementRequest req = new CreateViewAndElementRequest(viewDescriptor);
		
		CompoundCommand cmd = new CompoundCommand("Drop new activity");
		cmd.add(editor.getCommand(req));
		System.out.println(">>>>>> DropObjectEditPolicy.getDropCommand() canExecute()=" + cmd.canExecute());
		
		return cmd;
	}

	public boolean understandsRequest(Request request) {
		return RequestConstants.REQ_DROP_OBJECTS.equals(request.getType()) && request instanceof DropObjectsRequest;
	}
}