Exemplo n.º 1
0
 /**
  * Iterates a collection, and sums the Money elements contained in the specified property of each
  * object.
  *
  * <p>Nulls are excluded from the addition.
  *
  * @param <T> Type of elements in the collection.
  * @param collection Collection to iterate.
  * @param clazz Type of elements in the collection.
  * @param property Name of the property that contains the money element.
  * @param currency Currency of the money elements.
  * @return Returns the sum.
  */
 public static <T> Money sum(
     Collection<T> collection, Class<T> clazz, String property, Currency currency) {
   PropertyDescriptor pd = JavaBeanUtils.getPropertyDescriptor(clazz, property);
   MoneyCalculator calc = new MoneyCalculator(currency, false);
   for (T t : collection) {
     Money money = (Money) JavaBeanUtils.getProperty(pd, t);
     if (money != null) {
       calc.add(money);
     }
   }
   return calc.getResult();
 }
Exemplo n.º 2
0
 /**
  * Calculates a {@link Money} field that is calculated as a percentage of another money field in a
  * collection of elements . <br>
  * This method iterates a collection and sets a new value to a specified property of each element.
  * The new value is the result of a calculation. <br>
  * The calculation of each row takes into account the remainder that was created by the rounding
  * that took place during the previous calculation, due to rounding the result to the decimal
  * digits defined by the currency. <br>
  *
  * @param collection Collection with the elements.
  * @param clazz Class of each element in the collection.
  * @param prc Percentage being applied on the calculation.
  * @param amountProperty Name of the property that produces the base amount for the calculation.
  * @param calculatedProperty Name of the property that is filled with the result of the
  *     calculation.
  * @param currency Currency.
  * @param <T> Type of elements in the collection.
  */
 public static <T> void calcPercentage(
     Collection<T> collection,
     Class<T> clazz,
     BigDecimal prc,
     String amountProperty,
     String calculatedProperty,
     Currency currency) {
   PropertyDescriptor amountPd = JavaBeanUtils.getPropertyDescriptor(clazz, amountProperty);
   PropertyDescriptor calculatedPd =
       JavaBeanUtils.getPropertyDescriptor(clazz, calculatedProperty);
   MoneyCalculator calc = new MoneyCalculator(currency, true);
   for (T t : collection) {
     Money amount = (Money) JavaBeanUtils.getProperty(amountPd, t);
     if (amount != null) {
       calc.set(amount);
       Money calculated = calc.multiply(prc);
       JavaBeanUtils.setProperty(calculatedPd, calculated, t);
     }
   }
 }