com.yahoo.sketches.tuple

Class ArrayOfDoublesUnion

java.lang.Object

com.yahoo.sketches.tuple.ArrayOfDoublesUnion

public abstract class ArrayOfDoublesUnion
extends Object

The base class for unions of tuple sketches of type ArrayOfDoubles.

Method Summary

Modifier and Type	Method and Description
static int	getMaxBytes(int nomEntries, int numValues)
ArrayOfDoublesCompactSketch	getResult() Returns the resulting union in the form of a compact sketch
ArrayOfDoublesCompactSketch	getResult(Memory mem) Returns the resulting union in the form of a compact sketch
abstract void	reset() Resets the union to an empty state
byte[]	toByteArray()
void	update(ArrayOfDoublesSketch sketchIn) Updates the union by adding a set of entries from a given sketch

Methods inherited from class java.lang.Object

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

Method Detail

update

public void update(ArrayOfDoublesSketch sketchIn)

Updates the union by adding a set of entries from a given sketch

Parameters:

sketchIn - sketch to add to the union

getResult

public ArrayOfDoublesCompactSketch getResult(Memory mem)

Returns the resulting union in the form of a compact sketch

Parameters:

mem - memory for the result (can be null)

Returns:

compact sketch representing the union (off-heap if memory is provided)

getResult

public ArrayOfDoublesCompactSketch getResult()

Returns the resulting union in the form of a compact sketch

Returns:

on-heap compact sketch representing the union

reset

public abstract void reset()

Resets the union to an empty state

toByteArray

public byte[] toByteArray()

Returns:

a byte array representation of this object

getMaxBytes

public static int getMaxBytes(int nomEntries,
                              int numValues)

Parameters:

nomEntries - Nominal number of entries. Forced to the nearest power of 2 greater than given value.

numValues - Number of double values to keep for each key

Returns:

maximum required storage bytes given nomEntries and numValues