1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/task2/solution09/src/org/apidesign/apifest08/currency/ConvertorFactory.java	Wed Oct 01 10:43:05 2008 +0200
     1.3 @@ -0,0 +1,38 @@
     1.4 +package org.apidesign.apifest08.currency;
     1.5 +
     1.6 +import java.math.BigDecimal;
     1.7 +
     1.8 +
     1.9 +public class ConvertorFactory {
    1.10 +
    1.11 +    public static Convertor getConvertor(CurrencyType from, CurrencyType to) {
    1.12 +        if (from == CurrencyType.CZK && to == CurrencyType.USD) {
    1.13 +             return new BasicConvertor(new BigDecimal(17));
    1.14 +        } else if (from == CurrencyType.SKK && to == CurrencyType.CZK) {
    1.15 +            double rate = 0.8d;
    1.16 +            return new BasicConvertor(new BigDecimal(rate));
    1.17 +        }
    1.18 +
    1.19 +
    1.20 +        throw new UnsupportedOperationException("Conversion not supported now");
    1.21 +    }
    1.22 +
    1.23 +    private static class BasicConvertor implements Convertor {
    1.24 +
    1.25 +        private final BigDecimal conversionRate;
    1.26 +
    1.27 +        BasicConvertor(BigDecimal conversionRate) {
    1.28 +            this.conversionRate = conversionRate;
    1.29 +        }
    1.30 +
    1.31 +        @Override
    1.32 +        public long convertTo(long amount) {
    1.33 +            return (long) (conversionRate.doubleValue() * amount);
    1.34 +        }
    1.35 +
    1.36 +        @Override
    1.37 +        public long convertFrom(long amount) {
    1.38 +            return (long) (amount / conversionRate.doubleValue());
    1.39 +        }
    1.40 +    }
    1.41 +}