1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/task1/solution02/src/org/apidesign/apifest08/currency/DefaultConvertorFactory.java	Sun Sep 28 14:12:38 2008 +0200
     1.3 @@ -0,0 +1,49 @@
     1.4 +package org.apidesign.apifest08.currency;
     1.5 +
     1.6 +
     1.7 +import java.math.BigDecimal;
     1.8 +import java.util.Currency;
     1.9 +import java.util.HashMap;
    1.10 +import java.util.Map;
    1.11 +
    1.12 +/**
    1.13 + * Default factory for convertors. Basically it just keeps exchange rates for given currency combinations.
    1.14 + * @author lukas
    1.15 + *
    1.16 + */
    1.17 +class DefaultConvertorFactory {
    1.18 +	private static final Currency SKK = Currency.getInstance("SKK");
    1.19 +	private static final Currency USD = Currency.getInstance("USD");
    1.20 +	private static final Currency CZK = Currency.getInstance("CZK");
    1.21 +	private Map<String, Convertor> convertorMap = new HashMap<String, Convertor>();
    1.22 +	
    1.23 +	public 	DefaultConvertorFactory()
    1.24 +	{
    1.25 +		addConvertor(CZK,USD,BigDecimal.valueOf(17),BigDecimal.valueOf(1));
    1.26 +		addConvertor(CZK,SKK,BigDecimal.valueOf(80),BigDecimal.valueOf(100));
    1.27 +	}
    1.28 +
    1.29 +	private void addConvertor(Currency sourceCurrency, Currency destinationCurrency, BigDecimal sourceEquivalent, BigDecimal destinationEquivalent) {
    1.30 +		DefaultConvertor convertor = new DefaultConvertor(sourceEquivalent, destinationEquivalent, sourceCurrency, destinationCurrency);
    1.31 +		convertorMap.put(getConvertorKey(sourceCurrency, destinationCurrency), convertor);
    1.32 +		convertorMap.put(getConvertorKey(destinationCurrency, sourceCurrency), convertor.revert());
    1.33 +	}
    1.34 +		
    1.35 +	public Convertor getConvertor(Currency sourceCurrency, Currency destinationCurrency) throws UnsupportedConversionException
    1.36 +	{
    1.37 +		String convertorKey = getConvertorKey(sourceCurrency, destinationCurrency);
    1.38 +		Convertor result = convertorMap.get(convertorKey);
    1.39 +		if (result!=null)
    1.40 +		{
    1.41 +			return result;
    1.42 +		}
    1.43 +		else
    1.44 +		{
    1.45 +			throw new UnsupportedConversionException("Conversion from "+sourceCurrency+" to "+destinationCurrency+" is not supported");
    1.46 +		}
    1.47 +	}
    1.48 +
    1.49 +	private String getConvertorKey(Currency sourceCurrency,	Currency destinationCurrency) {
    1.50 +		return sourceCurrency.getCurrencyCode()+destinationCurrency.getCurrencyCode();
    1.51 +	}
    1.52 +}