/**
    * Copyright 2005-2015 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.kew.actiontaken.dao.impl;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.kew.actiontaken.dao.ActionTakenDao;
  import org.kuali.rice.kew.api.action.ActionType;
  
  import javax.persistence.EntityManager;
  import javax.persistence.NoResultException;
  import javax.persistence.TypedQuery;
  import java.sql.Timestamp;
  
  
  /**
   * JPA implementation of the {@link org.kuali.rice.kew.actiontaken.dao.ActionTakenDao}.
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class ActionTakenDaoJpa implements ActionTakenDao {
  
  	private EntityManager entityManager;
  
      private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(ActionTakenDaoJpa.class);
  
      public static final String GET_LAST_ACTION_TAKEN_DATE_NAME = "ActionTakenValue.getLastActionTakenDate";
      public static final String GET_LAST_ACTION_TAKEN_DATE_QUERY =
              "SELECT max(a.actionDate) from ActionTakenValue a where a.documentId = :documentId and a.actionTaken=:actionTaken";
  
      public Timestamp getLastActionTakenDate(String documentId, ActionType actionType) {
          if (StringUtils.isBlank(documentId) || actionType == null) {
              throw new IllegalArgumentException("Both documentId and actionType must be non-null");
          }
          TypedQuery<Timestamp> query =
                  entityManager.createNamedQuery(GET_LAST_ACTION_TAKEN_DATE_NAME, Timestamp.class);
          query.setParameter("documentId", documentId);
          query.setParameter("actionTaken", actionType.getCode());
          try {
              return query.getSingleResult();
          } catch (NoResultException e) {
              return null;
          }
      }
  
      public EntityManager getEntityManager() {
          return this.entityManager;
      }
  
      public void setEntityManager(EntityManager entityManager) {
          this.entityManager = entityManager;
      }
  
  }