productdaohibernate.java

Struts数据库项目中的一个实例

package com.relationinfo.dao.hibernate;

import java.util.List;

import com.relationinfo.model.Product;
import com.relationinfo.dao.ProductDAO;

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 ProductDAOHibernate extends BaseDAOHibernate implements ProductDAO {

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

    /**
     * @see com.relationinfo.dao.ProductDAO#getProduct(String productid)
     */
    public Product getProduct(final String productid) {
        Product product = (Product) getHibernateTemplate().get(Product.class, productid);
        if (product == null) {
            log.warn("uh oh, product with productid '" + productid + "' not found...");
            throw new ObjectRetrievalFailureException(Product.class, productid);
        }

        return product;
    }

    /**
     * @see com.relationinfo.dao.ProductDAO#saveProduct(Product product)
     */    
    public void saveProduct(final Product product) {
        getHibernateTemplate().saveOrUpdate(product);
    }

    /**
     * @see com.relationinfo.dao.ProductDAO#removeProduct(String productid)
     */
    public void removeProduct(final String productid) {
        getHibernateTemplate().delete(getProduct(productid));
    }
}