mbdaohibernate.java

Struts数据库开发中的一个案例

package com.relationinfo.dao.hibernate;

import java.util.List;

import com.relationinfo.model.Mb;
import com.relationinfo.dao.MbDAO;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.criterion.Example;
import org.hibernate.criterion.MatchMode;

import org.springframework.orm.ObjectRetrievalFailureException;
import org.springframework.orm.hibernate3.HibernateCallback;

public class MbDAOHibernate extends BaseDAOHibernate implements MbDAO {

    /**
     * @see com.relationinfo.dao.MbDAO#getMbs(com.relationinfo.model.Mb)
     */
    public List getMbs(final Mb mb) {
        if (mb == null) {
            return getHibernateTemplate().find("from Mb");
        } else {
            // filter on properties set in the mb
            HibernateCallback callback = new HibernateCallback() {
                public Object doInHibernate(Session session) throws HibernateException {
                    Example ex = Example.create(mb).ignoreCase().enableLike(MatchMode.ANYWHERE);
                    return session.createCriteria(Mb.class).add(ex).list();
                }
            };
            return (List) getHibernateTemplate().execute(callback);
        }
    }

    /**
     * @see com.relationinfo.dao.MbDAO#getMb(String mbbm)
     */
    public Mb getMb(final String mbbm) {
        Mb mb = (Mb) getHibernateTemplate().get(Mb.class, mbbm);
        if (mb == null) {
            log.warn("uh oh, mb with mbbm '" + mbbm + "' not found...");
            throw new ObjectRetrievalFailureException(Mb.class, mbbm);
        }

        return mb;
    }

    /**
     * @see com.relationinfo.dao.MbDAO#saveMb(Mb mb)
     */    
    public void saveMb(final Mb mb) {
        getHibernateTemplate().saveOrUpdate(mb);
    }

    /**
     * @see com.relationinfo.dao.MbDAO#removeMb(String mbbm)
     */
    public void removeMb(final String mbbm) {
        getHibernateTemplate().delete(getMb(mbbm));
    }
}