org.shapelogic.calculation
Interface Accumulator<In,Out>

Type Parameters:

In -

Out -

All Superinterfaces:

CalcValue<Out>, java.util.Iterator<Out>, LazyCalc<Out>

All Known Implementing Classes:

BaseAccumulator, MaxAccumulator, SumAccumulator

public interface Accumulator<In,Out>
extends LazyCalc<Out>, java.util.Iterator<Out>

Accumulator. Used to calculate say sum or a stream or just an iterator.

Author:

Sami Badawi

Method Summary

Out	accumulate(In element, Out out) return element + out;
java.util.Iterator<In>	getInput()
Out	getPreviousValue()

Methods inherited from interface org.shapelogic.calculation.LazyCalc

isDirty, setup

Methods inherited from interface org.shapelogic.calculation.CalcValue

getValue

Methods inherited from interface java.util.Iterator

hasNext, next, remove

Method Detail

getInput

java.util.Iterator<In> getInput()

accumulate

Out accumulate(In element,
               Out out)

return element + out;

getPreviousValue

Out getPreviousValue()