Hook: Define Currency Filter

Requirement

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

Filters are most often used in connection with displaying the contents of Currencies. If you want to display only selected CurrencyItems, use a filtered Currency.

Method of Adaptation

Enable Feature

Level of Support

Parameter Pattern

HotSpot

Filters

Participants

CurrencyFilter, NewFilter , Currency, originalCurrency , filteredCurrency

Changes

1. subclass NewFilter of CurrencyFilter.
2. NewFilter.match implements CurrencyFilter.match returning true for every CurrencyItem that shall be part of the filtered Currency.
3. instance originalCurrency of Currency.
4. instance filteredCurrency of NewFilter with parameter originalCurrency.