studentsdao.java

来自「用spring和Hib和sturs集合的系统」· Java 代码 · 共 142 行

package com.ssh.hibermate;

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;

/**
 * Data access object (DAO) for domain model class Students.
 * 
 * @see com.ssh.hibermate.Students
 * @author MyEclipse Persistence Tools
 */

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

	// property constants
	public static final String NAME = "name";

	public static final String PASS = "pass";

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

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

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

	public List findByExample(Students instance) {
		log.debug("finding Students instance by example");
		try {
			List results = getSession().createCriteria(
					"com.ssh.hibermate.Students").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 Students instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from Students 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 findByName(Object name) {
		return findByProperty(NAME, name);
	}

	public List findByPass(Object pass) {
		return findByProperty(PASS, pass);
	}

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

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

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

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