store.idl

mico_example_siegel c源代码

#ifndef STORE_IDL
#define STORE_IDL

// include interface definition for Point Of Sale objects
#include "POS.idl"

module AStore
{
   enum ItemTypes {food, clothes, other};
   typedef long AStoreId;

   struct ItemInfo
   {
      POS::Barcode      Item;
      ItemTypes         Itemtype;
      float             Itemcost;
      string            Name;
      long              Quantity;
   };

   // The barcodeNotFound exception indicates that the
   // input barcode does not match to any known item.
   exception BarcodeNotFound { POS::Barcode item; };

   interface StoreAccess; // /forward reference

   struct POSInfo
   {
        POS::POSId   Id;
        StoreAccess  StoreAccessReference;
        float        TotalSales;
        float        TotalTaxes;
   };

   typedef sequence <POSInfo> POSList;

   interface Tax
   {
      float CalculateTax(in float           TaxableAmount);
      float FindTaxablePrice(in float       ItemPrice,
                             in ItemTypes   ItemType);
   };

   interface Store
   {
        struct StoreTotals
        {
           float     StoreTotal;
           float     StoreTaxTotal;
        };

        readonly attribute AStoreId StoreId;

        // The struct StoreTotals and this readonly attribute are used
        // in place of a pair of float attributes to avoid data inconsistencies
        // that would result from the following sequence of operations:
        //
        //    POS 1 invokes a method to read StoreTotal
        //    POS 2 invokes the method UpdateStoreTotals
        //    POS 1 invoikes a method to read the StoreTaxTotal
        readonly attribute StoreTotals Totals;

        StoreAccess Login(in POS::POSId Id);
        void      GetPOSTotals(out POSList POSData);
        void      UpdateStoreTotals(
                      in POS::POSId Id,
                      in float      Price,
                      in float      Taxes);
   };

   interface StoreAccess
   {
      // ItemTaxPrice is 0 or return value of FindTaxablePrice()
      void      FindPrice(
                      in  POS::Barcode Item,
                      in  long         Quantity,
                      out float        ItemPrice,
                      out float        ItemTaxPrice,
                      out ItemInfo     IInfo)
         raises (BarcodeNotFound);
   };

};
#endif