Generic Repository in Spring JPA

Question

We are working on a Restful project with lots of DB tables. Though the operations on the tables are almost same and mainly INSERT/UPDATE/DELETE/FETCH.

my questions is:

Answer 1

For insert/update/delete operations such repository may be as simple as:

@Component
public class CommonRepository {

  @PersistenceContext
  EntityManager em;

  @Transactional
  public  E insert(E entity) {
     em.persist(entity);
     return entity;
  }

  @Transactional
  public  E update(E entity) {
     return em.merge(entity);
  }

  @Transactional
  public void delete(Object entity) {
     em.remove(entity);
  }

}

For more accurate code, refer SimpleJpaRepository implementation