Java tutorial
/* * File created on May 1, 2013 * * Copyright 2008-2013 Virginia Polytechnic Institute and State University * * 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.ualerts.fixed.repository; import java.util.List; import javax.persistence.NoResultException; import javax.persistence.TypedQuery; import org.springframework.stereotype.Repository; import org.ualerts.fixed.Room; /** * JPA implementation of {@link RoomRepository}. * * @author Brian Early */ @Repository("roomRepository") public class JpaRoomRepository extends AbstractJpaRepository implements RoomRepository { /** * {@inheritDoc} */ @Override public Room findRoom(String buildingId, String roomNumber) { Room result = null; try { result = getEntityManager().createNamedQuery("findRoom", Room.class) .setParameter("buildingId", buildingId).setParameter("roomNumber", roomNumber) .getSingleResult(); } catch (NoResultException ex) { result = null; } return result; } /** * {@inheritDoc} */ @Override public List<Room> findRoomsForBuilding(String buildingId) { TypedQuery<Room> query = getEntityManager().createNamedQuery("findRoomsForBuilding", Room.class) .setParameter("buildingId", buildingId); return query.getResultList(); } /** * {@inheritDoc} */ @Override public void addRoom(Room room) { getEntityManager().persist(room); } }