1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/task4/solution04/src/org/apidesign/apifest08/currency/DatedConvertorImpl.java	Fri Oct 17 17:40:14 2008 +0200
     1.3 @@ -0,0 +1,82 @@
     1.4 +package org.apidesign.apifest08.currency;
     1.5 +
     1.6 +import java.math.BigDecimal;
     1.7 +import java.util.Currency;
     1.8 +import java.util.Date;
     1.9 +
    1.10 +
    1.11 +final class DatedConvertorImpl
    1.12 +    extends    ConvertorImpl
    1.13 +    implements DatedConvertor
    1.14 +{
    1.15 +    private final DateRange range;
    1.16 +    
    1.17 +    DatedConvertorImpl(final DateRange rng,
    1.18 +                       final ExchangeRate r)
    1.19 +    {
    1.20 +        super(r);
    1.21 +        
    1.22 +        if(rng == null)
    1.23 +        {
    1.24 +            throw new IllegalArgumentException("rng cannot be null");
    1.25 +        }
    1.26 +
    1.27 +        range = rng;
    1.28 +    }
    1.29 +    
    1.30 +    public DateRange getDateRange()
    1.31 +    {
    1.32 +        return (range);
    1.33 +    }
    1.34 +
    1.35 +    @Override
    1.36 +    public BigDecimal convert(final Currency   from,
    1.37 +                              final Currency   to,
    1.38 +                              final BigDecimal amount)
    1.39 +        throws InvalidConversionException
    1.40 +    {
    1.41 +        final BigDecimal total;
    1.42 +        
    1.43 +        total = convert(from, to, amount, new Date(System.currentTimeMillis()));
    1.44 +        
    1.45 +        return (total);
    1.46 +    }
    1.47 +
    1.48 +    public BigDecimal convert(final Currency   from,
    1.49 +                              final Currency   to,
    1.50 +                              final BigDecimal amount,
    1.51 +                              final Date       date)
    1.52 +        throws InvalidConversionException
    1.53 +    {
    1.54 +        final BigDecimal total;
    1.55 +
    1.56 +        if(range.isInRange(date))
    1.57 +        {
    1.58 +            total = super.convert(from, to, amount);
    1.59 +        }
    1.60 +        else
    1.61 +        {
    1.62 +            throw new InvalidConversionException("cannot convert for date", from);
    1.63 +        }
    1.64 +
    1.65 +        return (total);
    1.66 +    }
    1.67 +
    1.68 +    public boolean canConvert(final Currency from,
    1.69 +                              final Currency to,
    1.70 +                              final Date     date)
    1.71 +    {
    1.72 +        final boolean retVal;
    1.73 +
    1.74 +        if(canConvert(from, to))
    1.75 +        {
    1.76 +            retVal = range.isInRange(date);
    1.77 +        }
    1.78 +        else
    1.79 +        {
    1.80 +            retVal = false;
    1.81 +        }
    1.82 +
    1.83 +        return (retVal);
    1.84 +    }
    1.85 +}