org.tikv.common.codec

Class Codec.IntegerCodec

java.lang.Object

org.tikv.common.codec.Codec.IntegerCodec

Enclosing class:

Codec

public static class Codec.IntegerCodec
extends Object

Constructor Summary

Constructors

Constructor and Description
IntegerCodec()

Method Summary

Modifier and Type	Method and Description
static long	readLong(CodecDataInput cdi) Decode as signed long, assuming encoder flips signed bit for memory comparable
static long	readULong(CodecDataInput cdi) Decode as unsigned long without any binary manipulation
static long	readUVarLong(CodecDataInput cdi) Decode as var-length unsigned long, the same as go's binary.Uvarint
static long	readVarLong(CodecDataInput cdi) Decode as var-length long, the same as go's binary.Varint
static void	writeDuration(CodecDataOutput cdo, long value) Encode Data as duration, the same as go's binary.PutUvarint
static void	writeLong(CodecDataOutput cdo, long lVal) Encode long value without type flag at the beginning The signed bit is flipped for memory comparable purpose
static void	writeLongFully(CodecDataOutput cdo, long lVal, boolean comparable) Encoding a long value to byte buffer with type flag at the beginning If we are encoding a key, the comparable is must true; otherwise the comparable is false.
static void	writeULong(CodecDataOutput cdo, long lVal) Encode long value without type flag at the beginning
static void	writeULongFully(CodecDataOutput cdo, long lVal, boolean comparable) Encoding a unsigned long value to byte buffer with type flag at the beginning

Methods inherited from class java.lang.Object

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

Constructor Detail

IntegerCodec

public IntegerCodec()

Method Detail

writeLongFully

public static void writeLongFully(CodecDataOutput cdo,
                                  long lVal,
                                  boolean comparable)

Encoding a long value to byte buffer with type flag at the beginning If we are encoding a key, the comparable is must true; otherwise the comparable is false.

Parameters:

cdo - For outputting data in bytes array

lVal - The data to encode

comparable - If the output should be memory comparable without decoding. In real TiDB use case, if used in Key encoding, we output memory comparable format otherwise not

writeULongFully

public static void writeULongFully(CodecDataOutput cdo,
                                   long lVal,
                                   boolean comparable)

Encoding a unsigned long value to byte buffer with type flag at the beginning

Parameters:

cdo - For outputting data in bytes array

lVal - The data to encode, note that long is treated as unsigned

comparable - If the output should be memory comparable without decoding. In real TiDB use case, if used in Key encoding, we output memory comparable format otherwise not

writeDuration

public static void writeDuration(CodecDataOutput cdo,
                                 long value)

Encode Data as duration, the same as go's binary.PutUvarint

Parameters:

cdo - For outputting data in bytes array

value - The data to encode

writeLong

public static void writeLong(CodecDataOutput cdo,
                             long lVal)

Encode long value without type flag at the beginning The signed bit is flipped for memory comparable purpose

Parameters:

cdo - For outputting data in bytes array

lVal - The data to encode

writeULong

public static void writeULong(CodecDataOutput cdo,
                              long lVal)

Encode long value without type flag at the beginning

Parameters:

cdo - For outputting data in bytes array

lVal - The data to encode

readLong

public static long readLong(CodecDataInput cdi)

Decode as signed long, assuming encoder flips signed bit for memory comparable

Parameters:

cdi - source of data

Returns:

decoded signed long value

readULong

public static long readULong(CodecDataInput cdi)

Decode as unsigned long without any binary manipulation

Parameters:

cdi - source of data

Returns:

decoded unsigned long value

readVarLong

public static long readVarLong(CodecDataInput cdi)

Decode as var-length long, the same as go's binary.Varint

Parameters:

cdi - source of data

Returns:

decoded signed long value

readUVarLong

public static long readUVarLong(CodecDataInput cdi)

Decode as var-length unsigned long, the same as go's binary.Uvarint

Parameters:

cdi - source of data

Returns:

decoded unsigned long value