/*

  * Copyright 2005-2008 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.HashMap;

 import java.util.List;

 import javax.persistence.EntityManager;

 import javax.persistence.PersistenceContext;

 import javax.persistence.PersistenceException;

 import org.apache.commons.beanutils.BeanUtils;

 import org.apache.log4j.Logger;

 import org.kuali.rice.core.util.OrmUtils;

 import org.kuali.rice.kim.bo.Group;

 import org.kuali.rice.kim.service.KIMServiceLocator;

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

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

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

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

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

 import org.kuali.rice.kns.document.Document;

 import org.kuali.rice.kns.service.DocumentAdHocService;

 import org.kuali.rice.kns.util.KNSPropertyConstants;

 import org.springframework.dao.DataAccessException;

 /**

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

  */

 public class DocumentDaoJpa implements DocumentDao {

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

     private BusinessObjectDao businessObjectDao;

     private DocumentAdHocService documentAdHocService;

         @PersistenceContext

         private EntityManager entityManager;

     public DocumentDaoJpa(EntityManager entityManager, BusinessObjectDao businessObjectDao, DocumentAdHocService documentAdHocService) {

         super();

         this.entityManager = entityManager;

         this.businessObjectDao = businessObjectDao;

         this.documentAdHocService = documentAdHocService;

     }

     /*

      * (non-Javadoc)

      *

      * @see org.kuali.dao.DocumentDao#save(null)

      */

     public void save(Document document) throws DataAccessException {

                 Document attachedDoc = findByDocumentHeaderId(document.getClass(),document.getDocumentNumber());

                 if (attachedDoc == null) {

                         entityManager.persist(document);

                 } else {

                         OrmUtils.reattach(attachedDoc, document);

                         entityManager.merge(attachedDoc);

                 }

     }

         /**

      * Retrieve a Document of a specific type with a given document header ID.

      *

      * @param clazz

      * @param id

      * @return Document with given id

      */

     public Document findByDocumentHeaderId(Class clazz, String id) throws DataAccessException {

         List idList = new ArrayList();

         idList.add(id);

         List documentList = findByDocumentHeaderIds(clazz, idList);

         Document document = null;

         if ((null != documentList) && (documentList.size() > 0)) {

             document = (Document) documentList.get(0);

         }

         return document;

     }

     /**

      * Retrieve a List of Document instances with the given ids

      *

      * @param clazz

      * @param idList

      * @return List

      */

     public List findByDocumentHeaderIds(Class clazz, List idList) throws DataAccessException {

                 org.kuali.rice.core.jpa.criteria.Criteria criteria = new org.kuali.rice.core.jpa.criteria.Criteria(clazz.getName());

                 criteria.in(KNSPropertyConstants.DOCUMENT_NUMBER, (List) idList);

                 List<Document> list = new ArrayList<Document>();

                 try {

                         list = new org.kuali.rice.core.jpa.criteria.QueryByCriteria(entityManager, criteria).toQuery().getResultList();

                 } catch (PersistenceException e) {

                         e.printStackTrace();

                 }

         for (Document doc : list) {

                 documentAdHocService.addAdHocs(doc);

                         entityManager.refresh(doc);

         }

                 return list;

     }

     /**

      *

      * Deprecated method. Should use BusinessObjectService.linkAndSave() instead.

      *

      */

     @Deprecated

     public void saveMaintainableBusinessObject(PersistableBusinessObject businessObject) {

             throw new UnsupportedOperationException("Don't use this depricated method.");

     }

     public BusinessObjectDao getBusinessObjectDao() {

         return businessObjectDao;

     }

     public void setBusinessObjectDao(BusinessObjectDao businessObjectDao) {

         this.businessObjectDao = businessObjectDao;

     }

     /**

      * @return the entityManager

      */

     public EntityManager getEntityManager() {

         return this.entityManager;

     }

     /**

      * @param entityManager the entityManager to set

      */

     public void setEntityManager(EntityManager entityManager) {

         this.entityManager = entityManager;

     }

     /**

          * @return the documentAdHocService

          */

         public DocumentAdHocService getDocumentAdHocService() {

                 return this.documentAdHocService;

         }

     /**

      * Setter for injecting the DocumentAdHocService

      * @param dahs

      */

     public void setDocumentAdHocService(DocumentAdHocService dahs) {

             this.documentAdHocService = dahs;

     }

 }