Hook: Define CountingStock Filter

Requirement

Only selected items of a CountingStock shall be visible to a part of an application.

Filters are most often used in connection with displaying the contents of CountingStocks. E.g., if you want the user to select items from a Stock of available items, but want to keep a safety margin, you can use a filtered CountingStock for the source Stock.

Method of Adaptation

Enable Feature

Level of Support

Parameter Pattern

HotSpot

Filters

Participants

CountingStockFilter, NewFilter , CountingStock, originalCountingStock , filteredCountingStock

Changes

1. subclass NewFilter of CountingStockFilter.
2. NewFilter.countItems implements CountingStockFilter.countItems .
3. instance originalCountingStock of CountingStock.
4. instance filteredCountingStock of NewFilter with parameter originalCountingStock.