package org.apidesign.apifest08.currency;

 import java.util.Currency;

 /**

  * Convertor Factory implementation

  * In the real-time world this code should be optimized - convertors caching etc.

  * @author Ladislav Vitasek

  */

 class CurrencyConvertorFactoryImpl extends AbstractConvertorFactory  {

     CurrencyConvertorFactoryImpl() {

         super();

     }

     // Note - implementation of this method is dummy

     public Convertor createConvertor(Currency currency1, Currency currency2, ConversionProperties conversionProperties) throws ConvertorNotAvailableException {

         if (currency1 == null || currency2 == null || conversionProperties == null)

             throw new NullPointerException();

         try {

             return new CurrencyConvertorImpl(currency1, currency2, conversionProperties.getConversionRatioProvider(), conversionProperties.getRoundingMode());//can be cached somehow

         } catch (Exception e) {

             throw new ConvertorNotAvailableException(e);

         }

     }

 }