Constructor Detail

• DoubleMeanValueAggregatorFunction

  public DoubleMeanValueAggregatorFunction()

Method Detail

• evaluate

  public Double evaluate(List<Double> data)

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

  Specified by:

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

  Parameters:

  data - List to traverse and sum

  Returns:

  arithmetic mean (average) of all the data in the list or null if the list is empty.

• toString

  public String toString()

  Overrides:

  toString in class Object