1.1 --- a/task2/solution13/src/org/apidesign/apifest08/currency/ExchangeRate.java	Wed Oct 01 10:43:05 2008 +0200
     1.2 +++ b/task2/solution13/src/org/apidesign/apifest08/currency/ExchangeRate.java	Tue Oct 07 01:18:23 2008 +0200
     1.3 @@ -12,20 +12,47 @@
     1.4      private BigDecimal numberFor;
     1.5      private BigDecimal numberGet;
     1.6  
     1.7 +    /**
     1.8 +     * Constructor for new exchange rate holding two values - <em>from value</em> and <em>to value</em>
     1.9 +     * @param fromValue Exchange rate <em>from value</em>
    1.10 +     * @param toValue Exchange rate <em>to value</em>
    1.11 +     */
    1.12      public  ExchangeRate(BigDecimal fromValue, BigDecimal toValue) {
    1.13          this.numberFor = fromValue;
    1.14          this.numberGet = toValue;
    1.15      }
    1.16 +    
    1.17 +    /**
    1.18 +     * Create new instance of <code>ExchangeRate</code> based on provided exchange rate, but swapping its
    1.19 +     * <em>from</em> and <em>to</em> value.
    1.20 +     * <p>
    1.21 +     * Provided exchange rate is not chaged, this method returns different instance describing reverted exchange rate.
    1.22 +     * 
    1.23 +     * @param rate Exchange rate which describes rate to be reverted.
    1.24 +     * @return Instance of reverted rate.
    1.25 +     */
    1.26 +    public static ExchangeRate createRevertedRate(ExchangeRate rate) {
    1.27 +        ExchangeRate reverted = new ExchangeRate(rate.getToValue(), rate.getFromValue());
    1.28 +        return reverted;
    1.29 +    }
    1.30  
    1.31      @Override
    1.32      public String toString() {
    1.33          return "for "+numberFor+" recieve "+numberGet+" @"+getClass().getName();
    1.34      }
    1.35      
    1.36 +    /**
    1.37 +     * Return exchange rate <em>from</em> value stored in this object.
    1.38 +     * @return Returns <em>from</em> value for this exchange rate.
    1.39 +     */
    1.40      public BigDecimal getFromValue() {
    1.41          return numberFor;
    1.42      }
    1.43      
    1.44 +    /**
    1.45 +     * Return exchange rate <em>to</em> value stored in this object.
    1.46 +     * @return Returns <em>to</em> value for this exchange rate.
    1.47 +     */
    1.48      public BigDecimal getToValue() {
    1.49          return numberGet;
    1.50      }