Package org.apache.druid.segment.data

Class VSizeLongSerde

java.lang.Object

org.apache.druid.segment.data.VSizeLongSerde

public class VSizeLongSerde
extends Object

Currently only support big endian

An empty 4 bytes is written upon closing to avoid index out of bound exception for deserializers that shift bytes

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	VSizeLongSerde.LongDeserializer	Unpack bitpacked long values from an underlying contiguous memory block
static interface	VSizeLongSerde.LongSerializer

Field Summary

Fields

Modifier and Type	Field	Description
static byte[]	EMPTY
static int[]	SUPPORTED_SIZES

Constructor Summary

Constructors

Constructor	Description
VSizeLongSerde()

Method Summary

Modifier and Type	Method	Description
static int	getBitsForMax(long value)
static VSizeLongSerde.LongDeserializer	getDeserializer(int longSize, ByteBuffer fromBuffer, int bufferOffset)
static int	getNumValuesPerBlock(int bitsPerValue, int blockSize)	Block size should be power of 2, so ColumnarLongs.get(int) can be optimized using bit operators.
static int	getSerializedSize(int bitsPerValue, int numValues)
static VSizeLongSerde.LongSerializer	getSerializer(int longSize, OutputStream output)
static VSizeLongSerde.LongSerializer	getSerializer(int longSize, ByteBuffer buffer, int bufferOffset)

Methods inherited from class java.lang.Object

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

Field Detail

SUPPORTED_SIZES

public static final int[] SUPPORTED_SIZES

EMPTY

public static final byte[] EMPTY

Constructor Detail

VSizeLongSerde

public VSizeLongSerde()

Method Detail

getBitsForMax

public static int getBitsForMax(long value)

getSerializedSize

public static int getSerializedSize(int bitsPerValue,
                                    int numValues)

getNumValuesPerBlock

public static int getNumValuesPerBlock(int bitsPerValue,
                                       int blockSize)

Block size should be power of 2, so ColumnarLongs.get(int) can be optimized using bit operators.

getSerializer

public static VSizeLongSerde.LongSerializer getSerializer(int longSize,
                                                          OutputStream output)

getSerializer

public static VSizeLongSerde.LongSerializer getSerializer(int longSize,
                                                          ByteBuffer buffer,
                                                          int bufferOffset)

getDeserializer

public static VSizeLongSerde.LongDeserializer getDeserializer(int longSize,
                                                              ByteBuffer fromBuffer,
                                                              int bufferOffset)