newscommentdao.java

自己写的学校网站框架

package edu.xjusoft.hibernate.DAO;

import edu.xjusoft.hibernate.BaseHibernateDAO;
import edu.xjusoft.hibernate.ORM.Newscomment;

import java.util.Date;
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.criterion.Example;

/**
 * A data access object (DAO) providing persistence and search support for
 * Newscomment 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 edu.xjusoft.hibernate.ORM.Newscomment
 * @author MyEclipse Persistence Tools
 */

public class NewscommentDAO extends BaseHibernateDAO {
	private static final Log log = LogFactory.getLog(NewscommentDAO.class);
	// property constants
	public static final String COMMENTCONTENT = "commentcontent";

	public void save(Newscomment transientInstance) {
		log.debug("saving Newscomment instance");
		try {
			getSession().getTransaction().begin();
			getSession().save(transientInstance);
			getSession().getTransaction().commit();
			log.debug("save successful");
		} catch (RuntimeException re) {
			getSession().getTransaction().rollback();
			log.error("save failed", re);
			throw re;
		}
	}

	public void delete(Newscomment persistentInstance) {
		log.debug("deleting Newscomment instance");
		try {
			getSession().delete(persistentInstance);
			log.debug("delete successful");
		} catch (RuntimeException re) {
			log.error("delete failed", re);
			throw re;
		}
	}

	public Newscomment findById(java.lang.Long id) {
		log.debug("getting Newscomment instance with id: " + id);
		try {
			Newscomment instance = (Newscomment) getSession().get(
					"edu.xjusoft.hibernate.ORM.Newscomment", id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(Newscomment instance) {
		log.debug("finding Newscomment instance by example");
		try {
			List results = getSession().createCriteria(
					"edu.xjusoft.hibernate.ORM.Newscomment").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 Newscomment instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from Newscomment 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 findByCommentcontent(Object commentcontent) {
		return findByProperty(COMMENTCONTENT, commentcontent);
	}

	public List findAll() {
		log.debug("finding all Newscomment instances");
		try {
			String queryString = "from Newscomment";
			Query queryObject = getSession().createQuery(queryString);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}

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

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

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