package org.springframework.samples.petclinic.jpa;
import java.util.Collection;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
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;
import org.springframework.dao.DataAccessException;
/**
* JPA implementation of the Clinic interface using EntityManager.
*
* <p>The mappings are defined in "orm.xml" located in the META-INF directory.
*
* @author Mike Keith
* @author Rod Johnson
* @author Sam Brannen
* @since 22.4.2006
*/
@Repository
@Transactional
public class EntityManagerClinic implements Clinic {
@PersistenceContext
private EntityManager em;
@Transactional(readOnly = true)
@SuppressWarnings("unchecked")
public Collection<Vet> getVets() {
return this.em.createQuery("SELECT vet FROM Vet vet ORDER BY vet.lastName, vet.firstName").getResultList();
}
@Transactional(readOnly = true)
@SuppressWarnings("unchecked")
public Collection<PetType> getPetTypes() {
return this.em.createQuery("SELECT ptype FROM PetType ptype ORDER BY ptype.name").getResultList();
}
@Transactional(readOnly = true)
@SuppressWarnings("unchecked")
public Collection<Owner> findOwners(String lastName) {
Query query = this.em.createQuery("SELECT owner FROM Owner owner WHERE owner.lastName LIKE :lastName");
query.setParameter("lastName", lastName + "%");
return query.getResultList();
}
@Transactional(readOnly = true)
public Owner loadOwner(int id) {
return this.em.find(Owner.class, id);
}
@Transactional(readOnly = true)
public Pet loadPet(int id) {
return this.em.find(Pet.class, id);
}
public void storeOwner(Owner owner) {
// Consider returning the persistent object here, for exposing
// a newly assigned id using any persistence provider...
Owner merged = this.em.merge(owner);
this.em.flush();
owner.setId(merged.getId());
}
public void storePet(Pet pet) {
// Consider returning the persistent object here, for exposing
// a newly assigned id using any persistence provider...
Pet merged = this.em.merge(pet);
this.em.flush();
pet.setId(merged.getId());
}
public void storeVisit(Visit visit) {
// Consider returning the persistent object here, for exposing
// a newly assigned id using any persistence provider...
Visit merged = this.em.merge(visit);
this.em.flush();
visit.setId(merged.getId());
}
public void deletePet(int id) throws DataAccessException {
Pet pet = loadPet(id);
this.em.remove(pet);
}
}