forked from spring-projects/spring-petclinic
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JpaOwnerRepositoryImpl.java
executable file
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/
JpaOwnerRepositoryImpl.java
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/*
* Copyright 2002-2013 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.samples.petclinic.repository.jpa;
import org.springframework.samples.petclinic.model.Owner;
import org.springframework.samples.petclinic.repository.OwnerRepository;
import org.springframework.stereotype.Repository;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import java.util.Collection;
import org.springframework.cache.annotation.Cacheable;
/**
* JPA implementation of the {@link OwnerRepository} interface.
*
* @author Mike Keith
* @author Rod Johnson
* @author Sam Brannen
* @author Michael Isvy
* @since 22.4.2006
*/
@Repository
public class JpaOwnerRepositoryImpl implements OwnerRepository {
@PersistenceContext
private EntityManager em;
@Override
@SuppressWarnings("unchecked")
@Cacheable(value = "ownersByLastName")
public Collection<Owner> findByLastName(String lastName) {
// using 'join fetch' because a single query should load both owners and pets
// using 'left join fetch' because it might happen that an owner does not have pets yet
Query query = this.em.createQuery("SELECT DISTINCT owner FROM Owner owner left join fetch owner.pets WHERE owner.lastName LIKE :lastName");
query.setParameter("lastName", lastName + "%");
return query.getResultList();
}
@Override
public Owner findById(int id) {
return em.find(Owner.class, id);
}
@Override
public void save(Owner owner) {
em.merge(owner);
}
}