Constructor Detail

• IntegerSumAggregatorFunction

  public IntegerSumAggregatorFunction()

Method Detail

• evaluate

  public Integer evaluate(List<Integer> data)

  Does the actual adding and returns the result. Please note that caller is responsible for synchronizing access to the list.

  Specified by:

  evaluate in interface UnaryFunction<List<Integer>,Integer>

  Parameters:

  data - List to traverse and sum

  Returns:

  arithmetic sum of all the data in the list or null if the list is empty.

• toString

  public String toString()

  Overrides:

  toString in class Object