moduledao.java

达内培训时做的亚信的实战项目 包含数据库 struts+hibernate

package com.tarena.oos.DAO;
// default package


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 com.tarena.oos.model.Module;

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

public class ModuleDAO extends BaseDAO  {
    private static final Log log = LogFactory.getLog(ModuleDAO.class);
	//property constants
	public static final String NAME = "name";
	public static final String USER_FLAG = "userFlag";


    
    public void save(Module transientInstance) {
        log.debug("saving Module instance");
        try {
            getSession().saveOrUpdate(transientInstance);
            getSession().beginTransaction().commit();
            log.debug("save successful");
        } catch (RuntimeException re) {
            log.error("save failed", re);
            throw re;
        }
    }
    
	public void delete(Module persistentInstance) {
        log.debug("deleting Module instance");
        try {
            getSession().delete(persistentInstance);
            getSession().beginTransaction().commit();
            log.debug("delete successful");
        } catch (RuntimeException re) {
            log.error("delete failed", re);
            throw re;
        }
    }
    
    public Module findById( java.lang.Integer id) {
        log.debug("getting Module instance with id: " + id);
        try {
            Module instance = (Module) getSession()
                    .get(Module.class, id);
            return instance;
        } catch (RuntimeException re) {
            log.error("get failed", re);
            throw re;
        }
    }
    
    
    public List findByExample(Module instance) {
        log.debug("finding Module instance by example");
        try {
            List results = getSession()
                    .createCriteria("Module")
                    .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 Module instance with property: " + propertyName
            + ", value: " + value);
      try {
         String queryString = "from Module 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 findByUserFlag(Object userFlag) {
		return findByProperty(USER_FLAG, userFlag);
	}
	

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

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