/**
    * 
    */
   package de.tivsource.page.dao.message;
   
   import java.util.List;
   
   import javax.ejb.Stateless;
   import javax.persistence.EntityManager;
  import javax.persistence.PersistenceContext;
  import javax.persistence.Query;
  
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  
  import de.tivsource.page.entity.message.Message;
  
  /**
   * @author Marc Michele
   *
   */
  @Stateless
  public class MessageDao implements MessageDaoLocal {
      /*
       * Statischer Logger der Klasse.
       */
      private static final Logger LOGGER = LogManager.getLogger(MessageDao.class);
  
      /*
       * EntityManager der Dao Klasse.
       */
      @PersistenceContext
      private EntityManager entityManager;
  
      /* (non-Javadoc)
       * @see de.tivsource.page.dao.message.MessageDaoLocal#save(de.tivsource.page.entity.message.Message)
       */
      @Override
      public void save(Message message) {
          LOGGER.info("save(Message message) aufgerufen");
          entityManager.persist(message);
      }
  
      /* (non-Javadoc)
       * @see de.tivsource.page.dao.message.MessageDaoLocal#merge(de.tivsource.page.entity.message.Message)
       */
      @Override
      public void merge(Message message) {
          LOGGER.info("merge(Message message) aufgerufen");
          entityManager.merge(message);
      }
  
      /* (non-Javadoc)
       * @see de.tivsource.page.dao.message.MessageDaoLocal#delete(de.tivsource.page.entity.message.Message)
       */
      @Override
      public void delete(Message message) {
          entityManager.remove(entityManager.find(Message.class, message.getUuid()));
      }
  
      /* (non-Javadoc)
       * @see de.tivsource.page.dao.message.MessageDaoLocal#findByUuid(java.lang.String)
       */
      @Override
      public Message findByUuid(String uuid) {
          return entityManager.find(Message.class, uuid);
      }
  
      /* (non-Javadoc)
       * @see de.tivsource.page.dao.message.MessageDaoLocal#findAll(java.lang.Integer, java.lang.Integer)
       */
      @SuppressWarnings("unchecked")
      @Override
      public List<Message> findAll(Integer start, Integer max) {
          Query query = entityManager.createQuery("from Message m");
          query.setFirstResult(start);
          query.setMaxResults(max);
          return query.getResultList();
      }
  
      /* (non-Javadoc)
       * @see de.tivsource.page.dao.message.MessageDaoLocal#findAll(java.lang.Integer, java.lang.Integer, java.lang.String, java.lang.String)
       */
      @SuppressWarnings("unchecked")
      @Override
      public List<Message> findAll(Integer start, Integer max, String field,
              String order) {
          String queryString = "select m from Message m order by ";
          queryString = queryString + field + " " + order;
          Query query = entityManager.createQuery(queryString);
          query.setFirstResult(start);
          query.setMaxResults(max);
          return query.getResultList();
      }
  
      /* (non-Javadoc)
       * @see de.tivsource.page.dao.message.MessageDaoLocal#countAll()
       */
      @Override
     public Integer countAll() {
         Query query = entityManager.createQuery("Select Count(m) from Message m");
         return Integer.parseInt(query.getSingleResult().toString());
     }
 
 }// Ende class