taskdao.java

一个OA系统

package com.zhou.dao;

import com.zhou.po.Task;

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 Task
 * 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 com.zhou.po.Task
 * @author MyEclipse Persistence Tools
 */

public class TaskDAO extends BaseHibernateDAO {
	private static final Log log = LogFactory.getLog(TaskDAO.class);
	// property constants
	public static final String CLASSSID = "classsid";

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

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

	public Task findById(java.lang.Long id) {
		log.debug("getting Task instance with id: " + id);
		try {
			Task instance = (Task) getSession().get("com.zhou.po.Task", id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(Task instance) {
		log.debug("finding Task instance by example");
		try {
			List results = getSession().createCriteria("com.zhou.po.Task").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 Task instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from Task 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 findByClasssid(Object classsid) {
		return findByProperty(CLASSSID, classsid);
	}

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

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

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

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