xxdaohibernate.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.Xx;
import com.relationinfo.dao.XxDAO;

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 XxDAOHibernate extends BaseDAOHibernate implements XxDAO {

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

    /**
     * @see com.relationinfo.dao.XxDAO#getXx(String xxbm)
     */
    public Xx getXx(final String xxbm) {
        Xx xx = (Xx) getHibernateTemplate().get(Xx.class, xxbm);
        if (xx == null) {
            log.warn("uh oh, xx with xxbm '" + xxbm + "' not found...");
            throw new ObjectRetrievalFailureException(Xx.class, xxbm);
        }

        return xx;
    }

    /**
     * @see com.relationinfo.dao.XxDAO#saveXx(Xx xx)
     */    
    public void saveXx(final Xx xx) {
        getHibernateTemplate().saveOrUpdate(xx);
    }

    /**
     * @see com.relationinfo.dao.XxDAO#removeXx(String xxbm)
     */
    public void removeXx(final String xxbm) {
        getHibernateTemplate().delete(getXx(xxbm));
    }
}