org.apache.datasketches.tuple

Class ArrayOfDoublesUnion

java.lang.Object

org.apache.datasketches.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(org.apache.datasketches.memory.WritableMemory dstMem) Returns the resulting union in the form of a compact sketch
static ArrayOfDoublesUnion	heapify(org.apache.datasketches.memory.Memory mem) Heapify the given Memory as an ArrayOfDoublesUnion
static ArrayOfDoublesUnion	heapify(org.apache.datasketches.memory.Memory mem, long seed) Heapify the given Memory and seed as an ArrayOfDoublesUnion
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
static ArrayOfDoublesUnion	wrap(org.apache.datasketches.memory.Memory mem) Wrap the given Memory as an ArrayOfDoublesUnion
static ArrayOfDoublesUnion	wrap(org.apache.datasketches.memory.Memory mem, long seed) Wrap the given Memory and seed as an ArrayOfDoublesUnion
static ArrayOfDoublesUnion	wrap(org.apache.datasketches.memory.WritableMemory mem) Wrap the given WritableMemory as an ArrayOfDoublesUnion
static ArrayOfDoublesUnion	wrap(org.apache.datasketches.memory.WritableMemory mem, long seed) Wrap the given WritableMemory and seed as an ArrayOfDoublesUnion

Methods inherited from class java.lang.Object

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

Method Detail

heapify

public static ArrayOfDoublesUnion heapify(org.apache.datasketches.memory.Memory mem)

Heapify the given Memory as an ArrayOfDoublesUnion

Parameters:

mem - the given Memory

Returns:

an ArrayOfDoublesUnion

heapify

public static ArrayOfDoublesUnion heapify(org.apache.datasketches.memory.Memory mem,
                                          long seed)

Heapify the given Memory and seed as an ArrayOfDoublesUnion

Parameters:

mem - the given Memory

seed - the given seed

Returns:

an ArrayOfDoublesUnion

wrap

public static ArrayOfDoublesUnion wrap(org.apache.datasketches.memory.Memory mem)

Wrap the given Memory as an ArrayOfDoublesUnion

Parameters:

mem - the given Memory

Returns:

an ArrayOfDoublesUnion

wrap

public static ArrayOfDoublesUnion wrap(org.apache.datasketches.memory.Memory mem,
                                       long seed)

Wrap the given Memory and seed as an ArrayOfDoublesUnion

Parameters:

mem - the given Memory

seed - the given seed

Returns:

an ArrayOfDoublesUnion

wrap

public static ArrayOfDoublesUnion wrap(org.apache.datasketches.memory.WritableMemory mem)

Wrap the given WritableMemory as an ArrayOfDoublesUnion

Parameters:

mem - the given Memory

Returns:

an ArrayOfDoublesUnion

wrap

public static ArrayOfDoublesUnion wrap(org.apache.datasketches.memory.WritableMemory mem,
                                       long seed)

Wrap the given WritableMemory and seed as an ArrayOfDoublesUnion

Parameters:

mem - the given Memory

seed - the given seed

Returns:

an ArrayOfDoublesUnion

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(org.apache.datasketches.memory.WritableMemory dstMem)

Returns the resulting union in the form of a compact sketch

Parameters:

dstMem - 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 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