package org.apidesign.apifest08.currency;

/**

 * Static exchange rate provider.

 * 

 * @author ked

 */

final class StaticExchangeRateProvider<AmountType, IdentifierType> implements ExchangeRateProvider<AmountType, IdentifierType> {

    final ExchangeRateValue<AmountType, IdentifierType> exchangeRate;

    private StaticExchangeRateProvider(ExchangeRateValue<AmountType, IdentifierType> exchangeRate) {

        this.exchangeRate = exchangeRate;

    }

    public void getExchangeRate(ExchangeRateRequest<AmountType, IdentifierType> request, ExchangeRateResponse<AmountType, IdentifierType> response) {

        response.setExchangeRate(exchangeRate);

    }

    static <AmountType, IdentifierType> StaticExchangeRateProvider<AmountType, IdentifierType> getStaticExchangeRateProvider(ExchangeRateValue<AmountType, IdentifierType> exchangeRate) {

        return new StaticExchangeRateProvider<AmountType, IdentifierType>(exchangeRate);

    }

    @Override

    public boolean equals(Object obj) {

        if (obj == null) {

            return false;

        }

        if (getClass() != obj.getClass()) {

            return false;

        }

        final StaticExchangeRateProvider other = (StaticExchangeRateProvider) obj;

        if (this.exchangeRate != other.exchangeRate && (this.exchangeRate == null || !this.exchangeRate.equals(other.exchangeRate))) {

            return false;

        }

        return true;

    }

    @Override

    public int hashCode() {

        int hash = 7;

        hash = 67 * hash + (this.exchangeRate != null ? this.exchangeRate.hashCode() : 0);

        return hash;

    }

}