sectiondao.java

一个网上购物商城系统

package tarena.dao;

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;

import tarena.entity.Section;

/**
 * Data access object (DAO) for domain model class Section.
 * 
 * @see tarena.entity.Section
 * @author MyEclipse Persistence Tools
 */

public class SectionDAO extends BaseHibernateDAO {
	private static final Log log = LogFactory.getLog(SectionDAO.class);

	// property constants
	public static final String SECTIONNAME = "sectionname";

	public static final String PARENTID = "parentid";

	public static final String DESCRIPTION = "description";

	public static final String MODERATORS = "moderators";

	public static final String PHOTO = "photo";

	public static final String SECTIONTYPE = "sectiontype";

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

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

	public Section findById(java.lang.Integer id) {
		log.debug("getting Section instance with id: " + id);
		try {
			Section instance = (Section) getSession().get(
					"tarena.entity.Section", id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(Section instance) {
		log.debug("finding Section instance by example");
		try {
			List results = getSession().createCriteria("tarena.entity.Section")
					.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 Section instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from Section 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 findBySectionname(Object sectionname) {
		return findByProperty(SECTIONNAME, sectionname);
	}

	public List findByParentid(Object parentid) {
		return findByProperty(PARENTID, parentid);
	}

	public List findByDescription(Object description) {
		return findByProperty(DESCRIPTION, description);
	}

	public List findByModerators(Object moderators) {
		return findByProperty(MODERATORS, moderators);
	}

	public List findByPhoto(Object photo) {
		return findByProperty(PHOTO, photo);
	}

	public List findBySectiontype(Object sectiontype) {
		return findByProperty(SECTIONTYPE, sectiontype);
	}

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

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

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

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