package org.apidesign.apifest08.currency;

 import java.util.Currency;

 /**

  * Abstract convertor implementation.

  * This class provide necessary stuff for creating any CurrencyConvertor

  * Convert value can be get by different way. Conversion should be made in its subclass.

  * @author Ladislav Vitasek

  */

 abstract class AbstractCurrencyConvertor implements Convertor {

     protected final ConversionRatioProvider conversionRatioProvider;

     protected final Currency currency1;

     protected final Currency currency2;

     public AbstractCurrencyConvertor(Currency currency1, Currency currency2, ConversionRatioProvider conversionRatioProvider) {

         this.currency1 = currency1;

         this.currency2 = currency2;

         this.conversionRatioProvider = conversionRatioProvider;

     }

     public Currency getCurrency1() {

         return currency1;

     }

     public Currency getCurrency2() {

         return currency2;

     }

 //    /**

 //     * Conversion value can be get by Different way. Let's decide subclass where to get actual value

 //     * @return current value of conversion constant

 //     */

 //    protected abstract BigDecimal getConversionValue();

     @SuppressWarnings({"RedundantIfStatement"})

     public boolean equals(Object o) {

         if (this == o) return true;

         if (o == null || getClass() != o.getClass()) return false;

         AbstractCurrencyConvertor that = (AbstractCurrencyConvertor) o;

         if (!conversionRatioProvider.equals(that.conversionRatioProvider)) return false;

         if (!currency1.equals(that.currency1)) return false;

         if (!currency2.equals(that.currency2)) return false;

         return true;

     }

     public int hashCode() {

         int result;

         result = conversionRatioProvider.hashCode();

         result = 31 * result + currency1.hashCode();

         result = 31 * result + currency2.hashCode();

         return result;

     }

     ConversionRatioProvider getConversionRatioProvider() {

         return conversionRatioProvider;

     }    

 }