/*

  * Copyright 2007 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.kns.dao.impl;

 import java.util.ArrayList;

 import java.util.Collection;

 import java.util.List;

 import org.apache.log4j.Logger;

 import org.apache.ojb.broker.query.Criteria;

 import org.apache.ojb.broker.query.Query;

 import org.apache.ojb.broker.query.QueryByCriteria;

 import org.apache.ojb.broker.query.QueryFactory;

 import org.kuali.rice.core.framework.persistence.ojb.dao.PlatformAwareDaoBaseOjb;

 import org.kuali.rice.kns.bo.Attachment;

 import org.kuali.rice.kns.bo.Note;

 import org.kuali.rice.kns.dao.NoteDao;

 import org.springframework.dao.DataAccessException;

 /**

  * This class is the OJB implementation of the NoteDao interface.

  *

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public class NoteDaoOjb extends PlatformAwareDaoBaseOjb implements NoteDao {

     private static Logger LOG = Logger.getLogger(NoteDaoOjb.class);

     /**

      * Default constructor.

      */

     public NoteDaoOjb() {

         super();

     }

     /**

      * Saves a note to the DB using OJB.

      *

      * @param line

      */

     public void save(Note note) throws DataAccessException {

         //workaround in case sequence is empty  I shouldn't need this but ojb seems to work weird with this case

         if(note!=null&&note.getNoteIdentifier()==null&&note.getAttachment()!=null) {

             Attachment attachment = note.getAttachment();

             note.setAttachment(null);

             //store without attachment

             getPersistenceBrokerTemplate().store(note);

             attachment.setNoteIdentifier(note.getNoteIdentifier());

             //put attachment back

             note.setAttachment(attachment);

         }

         getPersistenceBrokerTemplate().store(note);

     }

     /**

      * Deletes a note from the DB using OJB.

      */

     public void deleteNote(Note note) throws DataAccessException {

         getPersistenceBrokerTemplate().delete(note.getAttachment());

         note.setAttachment(null);

         getPersistenceBrokerTemplate().delete(note);

     }

     /**

      * Retrieves document associated with a given object using OJB.

      *

      * @param id

      * @return

      */

     public List<Note> findByremoteObjectId(String remoteObjectId) {

         Criteria criteria = new Criteria();

         //TODO: Notes - Chris move remoteObjectId string to constants

         criteria.addEqualTo("RMT_OBJ_ID", remoteObjectId);

         QueryByCriteria query = QueryFactory.newQuery(Note.class, criteria);

         //while this is currently called every time these methods could be changed to allow

         //custom sorting by BO see discussion on Notes confluence page

         defaultOrderBy(query);

         Collection<Note> notes = findCollection(query);

         return new ArrayList<Note>(notes);

     }

     public Note getNoteByNoteId(Long noteId) {

         Criteria crit = new Criteria();

         crit.addEqualTo("noteIdentifier", noteId);

         return (Note) this.getPersistenceBrokerTemplate().getObjectByQuery(new QueryByCriteria(Note.class, crit));          

     }

     /**

      * This method defines the default sort for notes

      * @param query

      */

     private void defaultOrderBy(QueryByCriteria query) {

         //TODO: Notes - Chris move remoteObjectId string to constants

         query.addOrderBy("notePostedTimestamp", true);

     }

     /**

      * Retrieve a Collection of note instances found by a query.

      *

      * @param query

      * @return

      */

     @SuppressWarnings("unchecked")

     private Collection<Note> findCollection(Query query) throws DataAccessException {

         return getPersistenceBrokerTemplate().getCollectionByQuery(query);

     }

 }