小编lan*_*l79的帖子

我对JPA标准有疑问.

这是我的JPA条件查询:

 CriteriaBuilder criteriaBuilder = getEm().getCriteriaBuilder();
 CriteriaQuery<InventoryItemSumReport> query = criteriaBuilder.createQuery(InventoryItemSumReport.class);
 Root<InventoryItemDetail> from = query.from(InventoryItemDetail.class);    

 Join<InventoryItemDetail, InventoryItem> joinItem = from.join(InventoryItemDetail_.inventoryItem); 

 Predicate where = criteriaBuilder.lessThanOrEqualTo(from.get(InventoryItemDetail_.effectiveDate), date);

 query.multiselect(joinItem.get(InventoryItem_.product),joinItem.get(InventoryItem_.facility),joinItem.get(InventoryItem_.customer));
 query.groupBy(joinItem.get(InventoryItem_.product),joinItem.get(InventoryItem_.facility),joinItem.get(InventoryItem_.customer));
 query.where(where); 

 TypedQuery<InventoryItemSumReport> createQuery = getEm().createQuery(query);       
 List<InventoryItemSumReport> resultList = createQuery.getResultList();

以下是JPA提供程序生成的结果查询:

    select
        inventoryi1_.PRODUCT_ID as col_0_0_,
        inventoryi1_.FACILITY_ID as col_1_0_,
        inventoryi1_.CUSTOMER_ID as col_2_0_ 
    from
        INVENTORY_ITEM_DETAIL inventoryi0_ 
    inner join
        INVENTORY_ITEM inventoryi1_ 
            on inventoryi0_.INVENTORY_ITEM_ID=inventoryi1_.ID 
    inner join
        PRODUCT product2_ 
            on inventoryi1_.PRODUCT_ID=product2_.ID 
    inner join
        FACILITY facility3_ 
            on inventoryi1_.FACILITY_ID=facility3_.ID 
    inner join
        CUSTOMER customer4_ 
            on inventoryi1_.CUSTOMER_ID=customer4_.ID 
    where
        inventoryi0_.EFFECTIVE_DATE<= ? 
    group by
        inventoryi1_.PRODUCT_ID , …

CDI装饰者可以成为无国籍的ejb吗？

我试过了:

@Decorator
@Stateless
public class WarehouseHandlingDecorator implements SerialKitServiceWarehouseHandling {


@Inject
@Any
@Delegate
protected SerialKitServiceWarehouseHandling serialKitServiceWarehouseHandling;

...

}

我部署在JBoss 6.1上,我收到以下消息:

WELD-000038不能将@Delegate放在一个不在Decorator上的注入点:@New Session bean [类com.eggsweb.production.services.WarehouseHandlingDecorator with qualifiers [@New]; 本地接口是[SerialKitServiceWarehouseHandling]