japod@55: package org.apidesign.apifest08.test;
japod@55: 
japod@55: 
japod@55: import java.math.BigDecimal;
japod@55: import java.util.Currency;
japod@55: import org.apidesign.apifest08.currency.ExchangeRate;
japod@55: import org.apidesign.apifest08.currency.ExchangeRateFinder;
japod@55: 
japod@55: 
japod@55: class TestExchangeRateFinder
japod@55:     implements ExchangeRateFinder
japod@55: {
japod@55:     private final BigDecimal min;
japod@55:     private final BigDecimal max;
japod@55:     private final BigDecimal stepUp;
japod@55:     private final BigDecimal stepDown;
japod@55:     private BigDecimal step;
japod@55:     private BigDecimal rate;
japod@55:     private boolean firstCall;
japod@55: 
japod@55:     TestExchangeRateFinder(final BigDecimal mn,
japod@55:                            final BigDecimal mx,
japod@55:                            final BigDecimal start,
japod@55:                            final BigDecimal up,
japod@55:                            final BigDecimal down)
japod@55:     {
japod@55:         min       = mn;
japod@55:         max       = mx;
japod@55:         rate      = start;
japod@55:         stepUp    = up;
japod@55:         stepDown  = down;
japod@55:         firstCall = true;
japod@55:     }
japod@55:     
japod@55:     public ExchangeRate findRate(Currency a, Currency b) 
japod@55:     {
japod@55:         final ExchangeRate value;
japod@55: 
japod@55:         if(rate.equals(max))
japod@55:         {
japod@55:             step = stepDown;
japod@55:         }
japod@55:         else if(rate.equals(min))
japod@55:         {
japod@55:             step = stepUp;
japod@55:         }
japod@55: 
japod@55:         value = new ExchangeRate(a, b, BigDecimal.ONE, rate);
japod@55: 
japod@55:         if(firstCall)
japod@55:         {
japod@55:             firstCall = false;
japod@55:         }
japod@55:         else
japod@55:         {
japod@55:             rate = rate.add(step);
japod@55:         }
japod@55: 
japod@55:         return (value);
japod@55:     }
japod@55: }