/*
* Copyright 2007-2012 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.springbyexample.orm.jpa.inheritance.dao;
import java.util.Collection;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.springbyexample.orm.jpa.inheritance.bean.Address;
import org.springbyexample.orm.jpa.inheritance.bean.Person;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
/**
* Person DAO implementation.
*
* @author David Winterfeldt
*/
@Repository
@Transactional(readOnly = true)
public class PersonInheritanceImpl implements PersonInheritanceDao {
private EntityManager em = null;
/**
* Sets the entity manager.
*/
@PersistenceContext
public void setEntityManager(EntityManager em) {
this.em = em;
}
/**
* Find persons.
*/
public Person findPersonById(Integer id) {
return em.find(Person.class, id);
}
/**
* Find persons using a start index and max number of results.
*/
@SuppressWarnings("unchecked")
public Collection<Person> findPersons(final int startIndex, final int maxResults) {
return em.createQuery("select p from Person p order by p.lastName, p.firstName")
.setFirstResult(startIndex).setMaxResults(maxResults).getResultList();
}
/**
* Find persons.
*/
@SuppressWarnings("unchecked")
public Collection<Person> findPersons() {
return em.createQuery("select p from Person p order by p.lastName, p.firstName").getResultList();
}
/**
* Find persons by last name.
*/
@SuppressWarnings("unchecked")
public Collection<Person> findPersonsByLastName(String lastName) {
return em.createQuery("select p from Person p where p.lastName = :lastName order by p.lastName, p.firstName")
.setParameter("lastName", lastName).getResultList();
}
/**
* Saves person.
*/
@Transactional(readOnly = false, propagation = Propagation.REQUIRES_NEW)
public Person save(Person person) {
return em.merge(person);
}
/**
* Deletes person.
*/
@Transactional(readOnly = false, propagation = Propagation.REQUIRES_NEW)
public void delete(Person person) {
em.remove(em.merge(person));
}
/**
* Saves address to person.
*/
@Transactional(readOnly = false, propagation = Propagation.REQUIRES_NEW)
public Person saveAddress(Integer id, Address address) {
Person person = findPersonById(id);
if (person.getAddresses().contains(address)) {
person.getAddresses().remove(address);
}
person.getAddresses().add(address);
return save(person);
}
/**
* Deletes address from person.
*/
@Transactional(readOnly = false, propagation = Propagation.REQUIRES_NEW)
public Person deleteAddress(Integer id, Integer addressId) {
Person person = findPersonById(id);
Address address = new Address();
address.setId(addressId);
if (person.getAddresses().contains(address)) {
for (Address a : person.getAddresses()) {
if (a.getId().equals(addressId)) {
em.remove(a);
person.getAddresses().remove(address);
break;
}
}
}
return person;
}
}