/**
    * 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.reporting.dao;
  
  import java.util.List;
  
  import javax.persistence.EntityManager;
  import javax.persistence.NoResultException;
  import javax.persistence.OptimisticLockException;
  import javax.persistence.PersistenceContext;
  import javax.persistence.Query;
  
  import org.kuali.mobility.file.entity.File;
  
  //import org.kuali.mobility.reporting.entity.File;
  import org.kuali.mobility.reporting.entity.Submission;
  import org.springframework.stereotype.Repository;
  
  /**
   * @author Kuali Mobility Team (mobility.collab@kuali.org)
   */
  @Repository
  public class ReportingDaoImpl implements ReportingDao {
  
  	@PersistenceContext
  	private EntityManager entityManager;
  
  	@SuppressWarnings("unchecked")
  	public List<Submission> findAllSubmissions() {
  		try {
  			Query query = entityManager.createQuery("select s from Submission s");
  			return query.getResultList();
  		} catch (NoResultException e) {
  			return null;
  		}
  	}
  
  	@SuppressWarnings("unchecked")
  	public List<Submission> findAllSubmissionsByParentId(Long id) {
  		try {
  			Query query = entityManager.createQuery("select s from Submission s where s.parentId = :id or s.id = :id order by s.revisionNumber desc");
  			query.setParameter("id", id);
  			return query.getResultList();
  		} catch (NoResultException e) {
  			return null;
  		}
  	}
  
  	public Submission findSubmissionById(Long id) {
  		try {
  			Query query = entityManager.createQuery("select s from Submission s where s.id = :id");
  			query.setParameter("id", id);
  			return (Submission) query.getSingleResult();
  		} catch (Exception e) {
  			return null;
  		}
  	}
  
  	public Long saveSubmission(Submission submission) {
  		if (submission == null) {
  			return null;
  		}
  		try {
  			if (submission.getId() == null) {
  				entityManager.persist(submission);
  			} else {
  				entityManager.merge(submission);
  			}
  		} catch (OptimisticLockException oe) {
  			return null;
  		}
  		return submission.getId();
  	}
  
  	public Long saveAttachment(File file) {
  		if (file == null) {
  			return null;
  		}
  		try {
  			if (file.getId() == null) {
  				entityManager.persist(file);
  			} else {
  				entityManager.merge(file);
  			}
  		} catch (OptimisticLockException oe) {
  			return null;
 		}
 		return file.getId();
 	}
 
 	public EntityManager getEntityManager() {
 		return entityManager;
 	}
 
 	public void setEntityManager(EntityManager entityManager) {
 		this.entityManager = entityManager;
 	}
 
 }