/**
    * Copyright 2005-2014 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.opensource.org/licenses/ecl2.php
    *
   * 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.rice.krad.dao.impl;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import javax.persistence.EntityManager;
  import javax.persistence.PersistenceContext;
  
  import org.kuali.rice.core.framework.persistence.jpa.criteria.Criteria;
  import org.kuali.rice.core.framework.persistence.jpa.criteria.QueryByCriteria;
  import org.kuali.rice.krad.bo.Attachment;
  import org.kuali.rice.krad.bo.Note;
  import org.kuali.rice.krad.dao.NoteDao;
  import org.springframework.dao.DataAccessException;
  
  /**
   * This class is the JPA implementation of the NoteDao interface.
   * 
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class NoteDaoJpa implements NoteDao {
  
  	@PersistenceContext
  	private EntityManager entityManager;
  
  	/**
  	 * Saves a note to the DB using JPA.
  	 */
  	public void save(Note note) throws DataAccessException {
  		if (note != null && note.getNoteIdentifier() == null && note.getAttachment() != null) {
  			Attachment attachment = note.getAttachment();
  			note.setAttachment(null);
  			// store without attachment
  			entityManager.merge(note);
  			attachment.setNoteIdentifier(note.getNoteIdentifier());
  			// put attachment back
  			note.setAttachment(attachment);
  		}
  		entityManager.merge(note);
  		
  	}
  
  	/**
  	 * Deletes a note from the DB using JPA.
  	 */
  	public void deleteNote(Note note) throws DataAccessException {
  		entityManager.remove(note.getAttachment());
  		note.setAttachment(null);
  		entityManager.remove(note);
  	}
  
  	/**
  	 * Retrieves document associated with a given object using JPA.
  	 */
  	public List<Note> findByremoteObjectId(String remoteObjectId) {
  		Criteria criteria = new Criteria(Note.class.getName());
  		// TODO: Notes - Chris move remoteObjectId string to constants
  		criteria.eq("remoteObjectIdentifier", remoteObjectId);
  		criteria.orderBy("notePostedTimestamp", true);
  		return new ArrayList<Note>(new QueryByCriteria(entityManager, criteria).toQuery().getResultList());
  	}
  	
  	 public Note getNoteByNoteId(Long noteId) {
  		 Criteria criteria = new Criteria(Note.class.getName());
  		 criteria.eq("noteIdentifier", noteId);
  	     return (Note) new QueryByCriteria(entityManager, criteria).toQuery().getSingleResult();
  	    }
  
      /**
       * @return the entityManager
       */
      public EntityManager getEntityManager() {
          return this.entityManager;
      }
  
      /**
       * @param entityManager the entityManager to set
       */
      public void setEntityManager(EntityManager entityManager) {
          this.entityManager = entityManager;
      }
  
  }