Package org.apache.datasketches.tuple.arrayofdoubles

Class ArrayOfDoublesAnotB

java.lang.Object

org.apache.datasketches.tuple.arrayofdoubles.ArrayOfDoublesAnotB

public abstract class ArrayOfDoublesAnotB
extends Object

Computes a set difference of two tuple sketches of type ArrayOfDoubles

Method Summary

Modifier and Type	Method	Description
abstract ArrayOfDoublesCompactSketch	getResult()	Gets the result of this operation in the form of a ArrayOfDoublesCompactSketch
abstract ArrayOfDoublesCompactSketch	getResult(org.apache.datasketches.memory.WritableMemory mem)	Gets the result of this operation in the form of a ArrayOfDoublesCompactSketch
abstract void	update(ArrayOfDoublesSketch a, ArrayOfDoublesSketch b)	Perform A-and-not-B set operation on the two given sketches.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

update

public abstract void update(ArrayOfDoublesSketch a, ArrayOfDoublesSketch b)

Perform A-and-not-B set operation on the two given sketches. A null sketch is interpreted as an empty sketch. This is not an accumulating update. Calling update() more than once without calling getResult() will discard the result of previous update()

Parameters:

a - The incoming sketch for the first argument

b - The incoming sketch for the second argument

getResult

public abstract ArrayOfDoublesCompactSketch getResult()

Gets the result of this operation in the form of a ArrayOfDoublesCompactSketch

Returns:

compact sketch representing the result of the operation

getResult

public abstract ArrayOfDoublesCompactSketch getResult(org.apache.datasketches.memory.WritableMemory mem)

Gets the result of this operation in the form of a ArrayOfDoublesCompactSketch

Parameters:

mem - memory for the result (can be null)

Returns:

compact sketch representing the result of the operation (off-heap if memory is provided)