/*

  * 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.krad.dao.impl;

 import java.util.List;

 import javax.persistence.EntityManager;

 import javax.persistence.PersistenceContext;

 import org.apache.commons.lang.StringUtils;

 import org.kuali.rice.core.framework.persistence.jpa.criteria.Criteria;

 import org.kuali.rice.core.framework.persistence.jpa.criteria.QueryByCriteria;

 import org.kuali.rice.core.framework.persistence.jpa.criteria.QueryByCriteria.QueryByCriteriaType;

 import org.kuali.rice.krad.dao.MaintenanceDocumentDao;

 import org.kuali.rice.krad.document.MaintenanceLock;

 import org.kuali.rice.krad.util.KRADPropertyConstants;

 /**

  * This class is the JPA implementation of the MaintenanceDocumentDao interface.

  */

 public class MaintenanceDocumentDaoJpa implements MaintenanceDocumentDao {

 //        private static org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(MaintenanceDocumentDaoJpa.class);

         @PersistenceContext

         private EntityManager entityManager;

         /**

          * @see org.kuali.rice.krad.dao.MaintenanceDocumentDao#getLockingDocumentNumber(java.lang.String, java.lang.String)

          */

         public String getLockingDocumentNumber(String lockingRepresentation, String documentNumber) {

                 String lockingDocNumber = "";

                 // build the query criteria

                 Criteria criteria = new Criteria(MaintenanceLock.class.getName());

                 criteria.eq("lockingRepresentation", lockingRepresentation);

                 // if a docHeaderId is specified, then it will be excluded from the

                 // locking representation test.

                 if (StringUtils.isNotBlank(documentNumber)) {

                         criteria.ne(KRADPropertyConstants.DOCUMENT_NUMBER, documentNumber);

                 }

                 // attempt to retrieve a document based off this criteria

                 MaintenanceLock maintenanceLock = (MaintenanceLock) new QueryByCriteria(entityManager, criteria).toQuery().getSingleResult();

                 // if a document was found, then there's already one out there pending,

                 // and we consider it 'locked' and we return the docnumber.

                 if (maintenanceLock != null) {

                         lockingDocNumber = maintenanceLock.getDocumentNumber();

                 }

                 return lockingDocNumber;

         }

 //        /**

 //         * Returns all pending maintenance documents locked by the given business object class.

 //         */

 //        public Collection getPendingDocumentsForClass(Class dataObjectClass) {

 //                Criteria criteria = new Criteria(MaintenanceLock.class.getName());

 //                criteria.like("lockingRepresentation", "%" + dataObjectClass.getName() + "%");

 //

 //                Collection maintenanceLocks = new QueryByCriteria(entityManager, criteria).toQuery().getResultList();

 //                if (!maintenanceLocks.isEmpty()) {

 //                        criteria = new Criteria(MaintenanceDocumentBase.class.getName());

 //                        List<String> documentNumbers = new ArrayList<String>();

 //

 //                        for (Object maintenanceLock : maintenanceLocks) {

 //                                documentNumbers.add(((MaintenanceLock) maintenanceLock).getDocumentNumber());

 //                        }

 //                        criteria.in("documentNumber", documentNumbers);

 //

 //                        return new QueryByCriteria(entityManager, criteria).toQuery().getResultList();

 //                } else {

 //                        return maintenanceLocks;

 //                }

 //        }

         /**

          * @see org.kuali.rice.krad.dao.MaintenanceDocumentDao#deleteLocks(java.lang.String)

          */

         public void deleteLocks(String documentNumber) {

                 Criteria criteria = new Criteria(MaintenanceLock.class.getName());

                 criteria.eq("documentNumber", documentNumber);

                 new QueryByCriteria(entityManager, criteria, QueryByCriteriaType.DELETE).toQuery().executeUpdate();

         }

         /**

          * @see org.kuali.rice.krad.dao.MaintenanceDocumentDao#storeLocks(java.util.List)

          */

         public void storeLocks(List<MaintenanceLock> maintenanceLocks) {

                 for (MaintenanceLock maintenanceLock : maintenanceLocks) {

                         entityManager.merge(maintenanceLock);

                 }

         }

     /**

      * @return the entityManager

      */

     public EntityManager getEntityManager() {

         return this.entityManager;

     }

     /**

      * @param entityManager the entityManager to set

      */

     public void setEntityManager(EntityManager entityManager) {

         this.entityManager = entityManager;

     }

 }