/**

  * Copyright 2011 The Kuali Foundation Licensed under the

  * Educational Community 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.osedu.org/licenses/ECL-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.kuali.mobility.user.dao;

 import java.util.List;

 import javax.persistence.EntityManager;

 import javax.persistence.PersistenceContext;

 import javax.persistence.Query;

 import org.kuali.mobility.user.entity.User;

 import org.kuali.mobility.user.entity.UserPreference;

 import org.springframework.stereotype.Repository;

 @Repository

 public class UserDaoImpl implements UserDao {

     @PersistenceContext

     private EntityManager entityManager;

     public UserDaoImpl() {}

     public User findUserByDeviceId(String deviceId) {

         Query query = entityManager.createQuery("select u from User u where u.deviceId = :deviceId");

         query.setParameter("deviceId", deviceId);

         try {

             return (User) query.getSingleResult();

         } catch (Exception e) {

             return null;

         }

     }

     public User findUserByPrincipalName(String principalName) {

         Query query = entityManager.createQuery("select u from User u where u.principalName = :principalName");

         query.setParameter("principalName", principalName);

         try {

             return (User) query.getSingleResult();

         } catch (Exception e) {

             return null;

         }

     }

     public User findUserByPrincipalId(Long principalId) {

         Query query = entityManager.createQuery("select u from User u where u.principalId = :principalId");

         query.setParameter("principalId", principalId);

         try {

             return (User) query.getSingleResult();

         } catch (Exception e) {

             return null;

         }

     }

     public void saveUser(User user) {

         if (user == null) {

             return;

         }

         if (user.getPrincipalId() == null) {

             entityManager.persist(user);

         } else {

             entityManager.merge(user);

         }

     }

         public void saveUserPreference(UserPreference userPreference) {

         if (userPreference == null) {

             return;

         }

         if (userPreference.getPreferenceId() == null) {

             entityManager.persist(userPreference);

         } else {

             entityManager.merge(userPreference);

         }                

         }

         public void deleteUserPreferenceById(Long preferenceId) {

         Query query = entityManager.createQuery("delete from UserPreference up where up.preferenceId = :preferenceId");

         query.setParameter("preferenceId", preferenceId);

         query.executeUpdate();

         }

         @SuppressWarnings("unchecked")

         public List<UserPreference> findAllUserPreferencesByPrincipalId(Long principalId) {

         Query query = entityManager.createQuery("select up from UserPreference up where up.principalId = :principalId");

         query.setParameter("principalId", principalId);

         try {

             return (List<UserPreference>) query.getResultList();

         } catch (Exception e) {

             return null;

         }

         }

         public UserPreference findUserPreferenceByPreferenceId(Long preferenceId) {

         Query query = entityManager.createQuery("select up from UserPreference up where up.preferenceId = :preferenceId");

         query.setParameter("preferenceId", preferenceId);

         try {

             return (UserPreference) query.getSingleResult();

         } catch (Exception e) {

             return null;

         }

         }

     public EntityManager getEntityManager() {

         return entityManager;

     }

     public void setEntityManager(EntityManager entityManager) {

         this.entityManager = entityManager;

     }

 }