guestbookdao.java

openblog是一个博客管理系统

package org.openblog.hibernate;

import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.LockMode;
import org.hibernate.Query;
import org.hibernate.Transaction;
import org.hibernate.criterion.Example;

/**
 * A data access object (DAO) providing persistence and search support for
 * Guestbook entities. Transaction control of the save(), update() and delete()
 * operations can directly support Spring container-managed transactions or they
 * can be augmented to handle user-managed Spring transactions. Each of these
 * methods provides additional information for how to configure it for the
 * desired type of transaction control.
 * 
 * @see org.openblog.hibernate.Guestbook
 * @author MyEclipse Persistence Tools
 */

public class GuestbookDAO extends BaseHibernateDAO {
	private static final Log log = LogFactory.getLog(GuestbookDAO.class);
	// property constants
	public static final String GUEST_NAME = "guestName";
	public static final String GUEST_URL = "guestUrl";
	public static final String GUEST_QQ = "guestQq";
	public static final String GUEST_EMAIL = "guestEmail";
	public static final String GUEST_CONTENT = "guestContent";
	public static final String GUEST_STATUS = "guestStatus";

	public void save(Guestbook transientInstance) {
		Transaction trans = null;
				
		log.debug("saving Guestbook instance");
		try {
			trans = getSession().beginTransaction();
			getSession().save(transientInstance);
			getSession().flush();
			trans.commit();
			log.debug("save successful");
		} catch (RuntimeException re) {
			if(trans!=null) trans.rollback();
			log.error("save failed", re);
			throw re;
		}
	}

	public void delete(Guestbook persistentInstance) {
		Transaction trans = null;
		log.debug("deleting Guestbook instance");
		try {
			trans = getSession().beginTransaction();
			
			getSession().delete(persistentInstance);
			getSession().flush();
			trans.commit();
			log.debug("delete successful");
		} catch (RuntimeException re) {
			if(trans!=null) trans.rollback();
			log.error("delete failed", re);
			throw re;
		}
	}

	public void modify(Guestbook persistentInstance) {
		Transaction trans = null;
		log.debug("modify Guestbook instance");
		try {
			trans = getSession().beginTransaction();
			getSession().update(persistentInstance);
			getSession().flush();
			trans.commit();
			log.debug("modify successful");
		} catch (RuntimeException re) {
			if(trans!=null) trans.rollback();
			log.error("modify failed", re);
			throw re;
		}
	}
	
	
	
	
	public Guestbook findById(java.lang.Integer id) {
		log.debug("getting Guestbook instance with id: " + id);
		try {
			Guestbook instance = (Guestbook) getSession().get(
					"org.openblog.hibernate.Guestbook", id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(Guestbook instance) {
		log.debug("finding Guestbook instance by example");
		try {
			List results = getSession().createCriteria(
					"org.openblog.hibernate.Guestbook").add(
					Example.create(instance)).list();
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		} catch (RuntimeException re) {
			log.error("find by example failed", re);
			throw re;
		}
	}

	public List findByProperty(String propertyName, Object value) {
		log.debug("finding Guestbook instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from Guestbook as model where model."
					+ propertyName + "= ?";
			Query queryObject = getSession().createQuery(queryString);
			queryObject.setParameter(0, value);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find by property name failed", re);
			throw re;
		}
	}

	public List findByGuestName(Object guestName) {
		return findByProperty(GUEST_NAME, guestName);
	}

	public List findByGuestUrl(Object guestUrl) {
		return findByProperty(GUEST_URL, guestUrl);
	}

	public List findByGuestQq(Object guestQq) {
		return findByProperty(GUEST_QQ, guestQq);
	}

	public List findByGuestEmail(Object guestEmail) {
		return findByProperty(GUEST_EMAIL, guestEmail);
	}

	public List findByGuestContent(Object guestContent) {
		return findByProperty(GUEST_CONTENT, guestContent);
	}

	public List findByGuestStatus(Object guestStatus) {
		return findByProperty(GUEST_STATUS, guestStatus);
	}

	public List findAll() {
		log.debug("finding all Guestbook instances");
		try {
			String queryString = "from Guestbook";
			Query queryObject = getSession().createQuery(queryString);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}
	public List findbyPage(int PageNo , int PageSize) {
		log.debug("finding all Guestbook instances");
		try {
			String queryString = "from Guestbook as model order by model.guestId desc";
			Query queryObject = getSession().createQuery(queryString);
			queryObject.setFirstResult((PageNo-1)*PageSize);
			queryObject.setMaxResults(PageSize);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}
	
	public Object countGuest() {
		log.debug("finding all Guestbook instances");
		try {
			String queryString = "select count(*) from Guestbook";
			Query queryObject = getSession().createQuery(queryString);
			return queryObject.uniqueResult();
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}
	
	
	
	
	public List findLatest(int num) {
		log.debug("finding all Guestbook instances");
		try {
			String queryString = "from Guestbook as a order by a.guestId desc";
			Query queryObject = getSession().createQuery(queryString);
			queryObject.setMaxResults(num);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}

	public Guestbook merge(Guestbook detachedInstance) {
		log.debug("merging Guestbook instance");
		try {
			Guestbook result = (Guestbook) getSession().merge(detachedInstance);
			log.debug("merge successful");
			return result;
		} catch (RuntimeException re) {
			log.error("merge failed", re);
			throw re;
		}
	}

	public void attachDirty(Guestbook instance) {
		log.debug("attaching dirty Guestbook instance");
		try {
			getSession().saveOrUpdate(instance);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public void attachClean(Guestbook instance) {
		log.debug("attaching clean Guestbook instance");
		try {
			getSession().lock(instance, LockMode.NONE);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}
}