orderbizbean.java

JavaEE5应用。Netbeans开发。EJB3.0。Glassfish容器。

/*
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 * and open the template in the editor.
 */
package sessionbeans;

import entities.CrmOrder;
import entities.CrmOrderItem;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import java.util.Vector;
import javax.persistence.Query;

/**
 *
 * @author James
 */
@Stateless
public class OrderBizBean implements OrderBizRemote, OrderBizLocal {

    @PersistenceContext
    private EntityManager em;

    public void process(CrmOrder order) {
        total(order);
        calcDiscount(order);
        persist(order);
    }

    private void total(CrmOrder order) {
        float total = 0;
        for (CrmOrderItem i : order.getCrmOrderItems()) {
            i.setAmount(i.getQuatity() * i.getPrice());
            total += i.getAmount();
        }
        order.setTotalamount(total);
    }

    private void calcDiscount(CrmOrder order) {
        order.setTotalamount(order.getTotalamount() * 0.9F);
    }

    public CrmOrder createOrder() {
        return new CrmOrder();
    }

    public CrmOrder findOrderById(long orderId) {
        return em.find(CrmOrder.class, orderId);

    }

    public void persist(Object object) {
        em.persist(object);
    }

    public Vector<CrmOrder> getPagedOrders(int pagesize, int start) {
        Query q = em.createQuery("select o from CrmOrder o");
        q.setMaxResults(pagesize);
        q.setFirstResult(start);
        return (Vector<CrmOrder>) q.getResultList();
    }
    // Add business logic below. (Right-click in editor and choose
    // "EJB Methods > Add Business Method" or "Web Service > Add Operation")
}