Package org.apache.druid.hll

Class VersionOneHyperLogLogCollector

java.lang.Object

org.apache.druid.hll.HyperLogLogCollector

org.apache.druid.hll.VersionOneHyperLogLogCollector

All Implemented Interfaces:

Comparable<HyperLogLogCollector>

public class VersionOneHyperLogLogCollector
extends HyperLogLogCollector

Field Summary

Fields

Modifier and Type	Field	Description
static final int	HEADER_NUM_BYTES
static final int	MAX_OVERFLOW_REGISTER_BYTE
static final int	MAX_OVERFLOW_VALUE_BYTE
static final int	NUM_BYTES_FOR_DENSE_STORAGE
static final int	NUM_NON_ZERO_REGISTERS_BYTE
static final int	REGISTER_OFFSET_BYTE
static final byte	VERSION	Header: Byte 0: version Byte 1: registerOffset Byte 2-3: numNonZeroRegisters Byte 4: maxOverflowValue Byte 5-6: maxOverflowRegister

Fields inherited from class org.apache.druid.hll.HyperLogLogCollector

BITS_FOR_BUCKETS, CORRECTION_PARAMETER, DENSE_THRESHOLD, HIGH_CORRECTION_THRESHOLD, LOW_CORRECTION_THRESHOLD, NUM_BUCKETS, NUM_BYTES_FOR_BUCKETS

Method Summary

Modifier and Type	Method	Description
short	getMaxOverflowRegister()
byte	getMaxOverflowValue()
int	getNumBytesForDenseStorage()
int	getNumHeaderBytes()
short	getNumNonZeroRegisters()
int	getPayloadBytePosition()
int	getPayloadBytePosition(ByteBuffer buffer)
byte	getRegisterOffset()
byte	getVersion()
void	setMaxOverflowRegister(short register)
void	setMaxOverflowRegister(ByteBuffer buffer, short register)
void	setMaxOverflowValue(byte value)
void	setMaxOverflowValue(ByteBuffer buffer, byte value)
void	setNumNonZeroRegisters(short numNonZeroRegisters)
void	setNumNonZeroRegisters(ByteBuffer buffer, short numNonZeroRegisters)
void	setRegisterOffset(byte registerOffset)
void	setRegisterOffset(ByteBuffer buffer, byte registerOffset)
void	setVersion(ByteBuffer buffer)

Methods inherited from class org.apache.druid.hll.HyperLogLogCollector

add, add, applyCorrection, compareTo, equals, estimateByteBuffer, estimateCardinality, estimateCardinalityRound, fold, fold, getInitPosition, getLatestNumBytesForDenseStorage, getStorageBuffer, hashCode, makeCollector, makeCollectorSharingStorage, makeEmptyVersionedByteArray, makeLatestCollector, toByteArray, toByteBuffer, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

VERSION

public static final byte VERSION

Header: Byte 0: version Byte 1: registerOffset Byte 2-3: numNonZeroRegisters Byte 4: maxOverflowValue Byte 5-6: maxOverflowRegister

See Also:

• Constant Field Values

REGISTER_OFFSET_BYTE

public static final int REGISTER_OFFSET_BYTE

See Also:

• Constant Field Values

NUM_NON_ZERO_REGISTERS_BYTE

public static final int NUM_NON_ZERO_REGISTERS_BYTE

See Also:

• Constant Field Values

MAX_OVERFLOW_VALUE_BYTE

public static final int MAX_OVERFLOW_VALUE_BYTE

See Also:

• Constant Field Values

MAX_OVERFLOW_REGISTER_BYTE

public static final int MAX_OVERFLOW_REGISTER_BYTE

See Also:

• Constant Field Values

HEADER_NUM_BYTES

public static final int HEADER_NUM_BYTES

See Also:

• Constant Field Values

NUM_BYTES_FOR_DENSE_STORAGE

public static final int NUM_BYTES_FOR_DENSE_STORAGE

See Also:

• Constant Field Values

Method Details

getVersion

public byte getVersion()

Specified by:

getVersion in class HyperLogLogCollector

setVersion

public void setVersion(ByteBuffer buffer)

Specified by:

setVersion in class HyperLogLogCollector

getRegisterOffset

public byte getRegisterOffset()

Specified by:

getRegisterOffset in class HyperLogLogCollector

setRegisterOffset

public void setRegisterOffset(byte registerOffset)

Specified by:

setRegisterOffset in class HyperLogLogCollector

setRegisterOffset

public void setRegisterOffset(ByteBuffer buffer,
 byte registerOffset)

Specified by:

setRegisterOffset in class HyperLogLogCollector

getNumNonZeroRegisters

public short getNumNonZeroRegisters()

Specified by:

getNumNonZeroRegisters in class HyperLogLogCollector

setNumNonZeroRegisters

public void setNumNonZeroRegisters(short numNonZeroRegisters)

Specified by:

setNumNonZeroRegisters in class HyperLogLogCollector

setNumNonZeroRegisters

public void setNumNonZeroRegisters(ByteBuffer buffer,
 short numNonZeroRegisters)

Specified by:

setNumNonZeroRegisters in class HyperLogLogCollector

getMaxOverflowValue

public byte getMaxOverflowValue()

Specified by:

getMaxOverflowValue in class HyperLogLogCollector

setMaxOverflowValue

public void setMaxOverflowValue(byte value)

Specified by:

setMaxOverflowValue in class HyperLogLogCollector

setMaxOverflowValue

public void setMaxOverflowValue(ByteBuffer buffer,
 byte value)

Specified by:

setMaxOverflowValue in class HyperLogLogCollector

getMaxOverflowRegister

public short getMaxOverflowRegister()

Specified by:

getMaxOverflowRegister in class HyperLogLogCollector

setMaxOverflowRegister

public void setMaxOverflowRegister(short register)

Specified by:

setMaxOverflowRegister in class HyperLogLogCollector

setMaxOverflowRegister

public void setMaxOverflowRegister(ByteBuffer buffer,
 short register)

Specified by:

setMaxOverflowRegister in class HyperLogLogCollector

getNumHeaderBytes

public int getNumHeaderBytes()

Specified by:

getNumHeaderBytes in class HyperLogLogCollector

getNumBytesForDenseStorage

public int getNumBytesForDenseStorage()

Specified by:

getNumBytesForDenseStorage in class HyperLogLogCollector

getPayloadBytePosition

public int getPayloadBytePosition()

Specified by:

getPayloadBytePosition in class HyperLogLogCollector

getPayloadBytePosition

public int getPayloadBytePosition(ByteBuffer buffer)

Specified by:

getPayloadBytePosition in class HyperLogLogCollector