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kundera+cassandra+eclipse でデータをマッピングしようとすると、次のエラーが発生しました。

Exception in thread "main" com.impetus.kundera.query.QueryHandlerException: No entity found by the name: riro
    at com.impetus.kundera.query.KunderaQuery.initEntityClass(KunderaQuery.java:403)
    at com.impetus.kundera.query.KunderaQuery.postParsingInit(KunderaQuery.java:339)
    at com.impetus.kundera.query.QueryResolver.getQueryImplementation(QueryResolver.java:78)
    at com.impetus.kundera.persistence.PersistenceDelegator.createQuery(PersistenceDelegator.java:593)
    at com.impetus.kundera.persistence.EntityManagerImpl.createQuery(EntityManagerImpl.java:384)
    at conector.main(conector.java:34)

私のクラスはこれです:

import javax.persistence.Query;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

public class conector
{
    public static void main(String[] args)
    {
        User user = new User();
        user.setIdEquipo("009");
        user.setFirstName("John");
        //user.setLastName("Smith");
       // user.setCity("London");

        EntityManagerFactory emf = Persistence.createEntityManagerFactory("cassandra_pu");
        EntityManager em = emf.createEntityManager();

        Query query =  (Query) em.createQuery("SELECT x FROM riro x");

        em.persist(user);
        em.close();    
        emf.close();    
   }
}
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