improvedeventdao.java

hibernate quickly 一书的各章节源代码

package com.manning.hq.ch07;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import java.util.List;


/**
 * The Data Access Object for managing the persistent Events.
 *
 * @author Patrick Peak
 * @author Nick Heudecker
 */
public class ImprovedEventDao extends AbstractDao {
    Log log = LogFactory.getLog(ImprovedEventDao.class);

    public ImprovedEventDao() {
        super();
    }

    /**
     * Insert a new Event into the database.
     * @param event
     */
    public void create(Event event) throws DataAccessLayerException {
        super.saveOrUpdate(event);
    }


    /**
     * Delete a detached Event from the database.
     * @param event
     */
    public void delete(Event event) throws DataAccessLayerException {
        super.delete(event);
    }

    /**
     * Find an Event by its primary key.
     * @param id
     * @return
     */
    public Event find(Long id) throws DataAccessLayerException {
        return (Event) super.find(Event.class, id);
    }

    /**
     * Updates the state of a detached Event.
     *
     * @param event
     */
    public void update(Event event) throws DataAccessLayerException {
        super.saveOrUpdate(event);
    }

    /**
     * Finds all Events in the database.
     * @return
     */
    public List findAll() throws DataAccessLayerException{
        return super.findAll(Event.class);
    }

}