output para el command apply

Command/WorkflowApplyCommand.php

@@ -56,17 +56,32 @@ class WorkflowApplyCommand extends ContainerAwareCommand
         $entityClass = $input->getOption('entity');
         $entityId = $input->getOption('id');
 
+	if(!class_exists($entityClass)){
+		throw new \Exception("Class '$entityClass' not found");
+	}
+
 	$entity = $entity_manager->getRepository($entityClass)->find($entityId);
 	if(!$entity){
-		throw \Exception("Entity $entityClass with id $entityId not found");
+		throw new \Exception("Entity $entityClass with id $entityId not found");
 	}
         
 	$wreg = $this->getContainer()->get("workflow.registry");
 	$wf = $wreg->get($entity, $workflow);
 
+	$transitions = array_map(function($obj){
+		return $obj->getName();
+	}, $wf->getEnabledTransitions($entity));
+
+	if(!in_array($transition, $transitions)){
+		throw new \Exception ("Can't apply transition '$transition', only allowed transitions for this entity are '". implode("','", $transitions). "'");
+	}
+	$from = array_keys($wf->getMarking($entity)->getPlaces());
 	$newState = $wf->apply($entity, $transition);
 	$entity_manager->persist($entity);
 	$entity_manager->flush($entity);
 
+	$to = array_keys($wf->getMarking($entity)->getPlaces());
+	$output->writeln("Applyed ".  $transition . "(".(string)$entity. ") : " . json_encode($from) . " -> " . json_encode($to));
+
     }
 }