package org.springframework.samples.petclinic.hibernate;
import java.util.Collection;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.dao.DataAccessException;
import org.springframework.samples.petclinic.Clinic;
import org.springframework.samples.petclinic.Owner;
import org.springframework.samples.petclinic.Pet;
import org.springframework.samples.petclinic.PetType;
import org.springframework.samples.petclinic.Vet;
import org.springframework.samples.petclinic.Visit;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;
/**
* Hibernate implementation of the Clinic interface.
*
* <p>The mappings are defined in "petclinic.hbm.xml", located in the root of the
* class path.
*
* <p>Note that transactions are declared with annotations and that some methods
* contain "readOnly = true" which is an optimization that is particularly
* valuable when using Hibernate (to suppress unnecessary flush attempts for
* read-only operations).
*
* @author Juergen Hoeller
* @author Sam Brannen
* @author Mark Fisher
* @since 19.10.2003
*/
@Repository
@Transactional
public class HibernateClinic implements Clinic {
private SessionFactory sessionFactory;
@Autowired
public HibernateClinic(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
@Transactional(readOnly = true)
@SuppressWarnings("unchecked")
public Collection<Vet> getVets() {
return sessionFactory.getCurrentSession().createQuery("from Vet vet order by vet.lastName, vet.firstName").list();
}
@Transactional(readOnly = true)
@SuppressWarnings("unchecked")
public Collection<PetType> getPetTypes() {
return sessionFactory.getCurrentSession().createQuery("from PetType type order by type.name").list();
}
@Transactional(readOnly = true)
@SuppressWarnings("unchecked")
public Collection<Owner> findOwners(String lastName) {
return sessionFactory.getCurrentSession().createQuery("from Owner owner where owner.lastName like :lastName")
.setString("lastName", lastName + "%").list();
}
@Transactional(readOnly = true)
public Owner loadOwner(int id) {
return (Owner) sessionFactory.getCurrentSession().load(Owner.class, id);
}
@Transactional(readOnly = true)
public Pet loadPet(int id) {
return (Pet) sessionFactory.getCurrentSession().load(Pet.class, id);
}
public void storeOwner(Owner owner) {
// Note: Hibernate3's merge operation does not reassociate the object
// with the current Hibernate Session. Instead, it will always copy the
// state over to a registered representation of the entity. In case of a
// new entity, it will register a copy as well, but will not update the
// id of the passed-in object. To still update the ids of the original
// objects too, we need to register Spring's
// IdTransferringMergeEventListener on our SessionFactory.
sessionFactory.getCurrentSession().merge(owner);
}
public void storePet(Pet pet) {
sessionFactory.getCurrentSession().merge(pet);
}
public void storeVisit(Visit visit) {
sessionFactory.getCurrentSession().merge(visit);
}
public void deletePet(int id) throws DataAccessException {
Pet pet = loadPet(id);
sessionFactory.getCurrentSession().delete(pet);
}
}