package org.minetti.astrodevice.server.hibernate.dao;
   
   import javax.persistence.EntityManagerFactory;
   import org.minetti.astrodevice.server.core.dao.DaoSession;
   import org.minetti.astrodevice.server.core.dao.DaoTransaction;
   import org.minetti.astrodevice.server.core.dao.DeviceSpecificationDao;
   import org.minetti.astrodevice.server.core.dao.ObservingSiteDao;
   
   /**
   * DAO factory used by the {@link DaoModuleImpl} class.
   * @author Jean-Philippe MINETTI
   */
  public final class DaoFactory {
  
  	/**
  	 * Entity manager factory.
  	 */
  	private EntityManagerFactory factory = null;
  
  	/**
  	 * Constructor.
  	 * @param factory Entity manager factory.
  	 */
  	public DaoFactory (final EntityManagerFactory factory) {
  		super();
  		this.factory = factory;
  	}
  
  	/**
  	 * Returns the session used for the DAO.
  	 * @return Session used for the DAO.
  	 */
  	public DaoSession newDaoSession () {
  		return new DaoSessionImpl(this.factory.createEntityManager());
  	}
  
  	/**
  	 * Creates and returns a new instance of transaction used to group multiple changing by DAO.
  	 * @param session Session used for the DAO.
  	 * @return Transaction used to group multiple changing by DAO.
  	 */
  	public DaoTransaction newDaoTransaction (final DaoSession session) {
  		return new DaoTransactionImpl(((DaoSessionImpl) session).getEntityManager().getTransaction());
  	}
  
  	/**
  	 * Creates and returns a new instance of DAO for observing sites.
  	 * @param session Session used for the DAO.
  	 * @return DAO for observing sites.
  	 */
  	public ObservingSiteDao newObservingSiteDao (final DaoSession session) {
  		return new ObservingSiteDaoImpl(((DaoSessionImpl) session).getEntityManager());
  	}
  
  	/**
  	 * Creates and returns a new instance of DAO for specifications on devices.
  	 * @param session Session used for the DAO.
  	 * @return DAO for specifications on devices.
  	 */
  	public DeviceSpecificationDao newDeviceSpecificationDao (final DaoSession session) {
  		return new DeviceSpecificationDaoImpl(((DaoSessionImpl) session).getEntityManager());
  	}
  
  	/**
  	 * Closes the factory.
  	 */
  	public void close () {
  		this.factory.close();
  	}
  
  	/*
  	 * (non-Javadoc)
  	 * @see java.lang.Object#toString()
  	 */
  	@Override
  	public String toString () {
  		return "DaoFactory[" + this.factory + "]";
  	}
  
  }