lmdaohibernate.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.Lm;
import com.relationinfo.dao.LmDAO;

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 LmDAOHibernate extends BaseDAOHibernate implements LmDAO {

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

    /**
     * @see com.relationinfo.dao.LmDAO#getLm(String lmbm)
     */
    public Lm getLm(final String lmbm) {
        Lm lm = (Lm) getHibernateTemplate().get(Lm.class, lmbm);
        if (lm == null) {
            log.warn("uh oh, lm with lmbm '" + lmbm + "' not found...");
            throw new ObjectRetrievalFailureException(Lm.class, lmbm);
        }

        return lm;
    }

    /**
     * @see com.relationinfo.dao.LmDAO#saveLm(Lm lm)
     */    
    public void saveLm(final Lm lm) {
        getHibernateTemplate().saveOrUpdate(lm);
    }

    /**
     * @see com.relationinfo.dao.LmDAO#removeLm(String lmbm)
     */
    public void removeLm(final String lmbm) {
        getHibernateTemplate().delete(getLm(lmbm));
    }
}