commentdao.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
 * Comment 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.Comment2
 * @author MyEclipse Persistence Tools
 */

public class CommentDAO extends BaseHibernateDAO {
	private static final Log log = LogFactory.getLog(CommentDAO.class);
	// property constants
	public static final String COMMENT_NAME = "commentName";
	public static final String COMMENT_URL = "commentUrl";
	public static final String COMMENT_QQ = "commentQq";
	public static final String COMMENT_EMAIL = "commentEmail";
	public static final String COMMENT_CONTENT = "commentContent";
	public static final String COMMENT_STATUS = "commentStatus";
	public static final String COMMENT_DATE = "commentDate";

	public void save(Comment transientInstance) {
		Transaction trans  = null;
		log.debug("saving Comment 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(Comment persistentInstance) {
		Transaction trans  = null;
		log.debug("deleting Comment 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(Comment persistentInstance) {
		Transaction trans = null;
		log.debug("modify Comment 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 Comment findById(java.lang.Integer id) {
		log.debug("getting Comment instance with id: " + id);
		try {
			Comment instance = (Comment) getSession().get(
					"org.openblog.hibernate.Comment", id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(Comment instance) {
		log.debug("finding Comment instance by example");
		try {
			List results = getSession().createCriteria(
					"org.openblog.hibernate.Comment").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 Comment instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from Comment 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 Object countComment(String propertyName, Object value) {
		log.debug("finding Comment instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "select count(*) from Comment as model where model."
					+ propertyName + "= ?";
			Query queryObject = getSession().createQuery(queryString);
			queryObject.setParameter(0, value);
			return queryObject.uniqueResult();
		} catch (RuntimeException re) {
			log.error("find by property name failed", re);
			throw re;
		}
	}
	
	

	public List findByCommentName(Object commentName) {
		return findByProperty(COMMENT_NAME, commentName);
	}

	public List findByCommentUrl(Object commentUrl) {
		return findByProperty(COMMENT_URL, commentUrl);
	}

	public List findByCommentQq(Object commentQq) {
		return findByProperty(COMMENT_QQ, commentQq);
	}

	public List findByCommentEmail(Object commentEmail) {
		return findByProperty(COMMENT_EMAIL, commentEmail);
	}

	public List findByCommentContent(Object commentContent) {
		return findByProperty(COMMENT_CONTENT, commentContent);
	}

	public List findByCommentStatus(Object commentStatus) {
		return findByProperty(COMMENT_STATUS, commentStatus);
	}

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

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

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

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