StoredProcedureQuery Result Map to Java Pojo

Hibernate ORM
5

I have tried that way,as mentioned below but i am getting below Exception
entityManager.createNativeQuery("call my_Storedprocedure(?)").setParameter(1,myParam).unwrap(Query.class).setResultTransformer(Transformers.aliasToBean(MyTargetClass.class));

Exception

java.lang.ClassCastException: MyTargetClass cannot be cast to java.util.Map