com.netflix.hollow.core.memory.encoding

Class VarInt

java.lang.Object

com.netflix.hollow.core.memory.encoding.VarInt

public class VarInt
extends java.lang.Object

Variable-byte integer encoding and decoding logic

Constructor Summary

Constructors

Constructor and Description
VarInt()

Method Summary

Methods

Modifier and Type	Method and Description
static int	countVarIntsInRange(ByteData byteData, long fieldPosition, int length) Count the number of variable length integers encoded in the supplied ByteData in the specified range.
static int	nextVLongSize(ByteData arr, long position) Determine the size (in bytes) of the variable length long in the supplied ByteData, starting at the specified position.
static int	readVInt(ByteData arr, long position) Read a variable length integer from the supplied ByteData starting at the specified position.
static int	readVInt(java.io.InputStream in) Read a variable length integer from the supplied InputStream
static long	readVLong(ByteData arr, long position) Read a variable length long from the supplied ByteData starting at the specified position.
static long	readVLong(java.io.InputStream in) Read a variable length long from the supplied InputStream.
static boolean	readVNull(ByteData arr, long position) Determine whether or not the value at the specified position in the supplied ByteData is a 'null' variable length integer.
static int	sizeOfVInt(int value) Determine the size (in bytes) of the specified value when encoded as a variable length integer.
static int	sizeOfVLong(long value) Determine the size (in bytes) of the specified value when encoded as a variable length integer.
static int	writeVInt(byte[] data, int pos, int value) Write the value as a VarInt into the array, starting at the specified position.
static void	writeVInt(ByteDataBuffer buf, int value) Encode the specified int as a variable length integer into the supplied ByteDataBuffer
static void	writeVInt(java.io.OutputStream out, int value) Encode the specified int as a variable length integer into the supplied OutputStream
static void	writeVLong(ByteDataBuffer buf, long value) Encode the specifed long as a variable length integer into the supplied ByteDataBuffer
static void	writeVLong(java.io.OutputStream out, long value) Encode the specified long as a variable length integer into the supplied OuputStream
static void	writeVNull(ByteDataBuffer buf) Write a 'null' variable length integer into the supplied ByteDataBuffer

Methods inherited from class java.lang.Object

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

Constructor Detail

VarInt

public VarInt()

Method Detail

writeVNull

public static void writeVNull(ByteDataBuffer buf)

Write a 'null' variable length integer into the supplied ByteDataBuffer

writeVLong

public static void writeVLong(ByteDataBuffer buf,
              long value)

Encode the specifed long as a variable length integer into the supplied ByteDataBuffer

writeVLong

public static void writeVLong(java.io.OutputStream out,
              long value)
                       throws java.io.IOException

Encode the specified long as a variable length integer into the supplied OuputStream

Throws:

java.io.IOException

writeVInt

public static void writeVInt(ByteDataBuffer buf,
             int value)

Encode the specified int as a variable length integer into the supplied ByteDataBuffer

writeVInt

public static void writeVInt(java.io.OutputStream out,
             int value)
                      throws java.io.IOException

Encode the specified int as a variable length integer into the supplied OutputStream

Throws:

java.io.IOException

writeVInt

public static int writeVInt(byte[] data,
            int pos,
            int value)

Write the value as a VarInt into the array, starting at the specified position. Returns the next position after the VarInt has been written.

readVNull

public static boolean readVNull(ByteData arr,
                long position)

Determine whether or not the value at the specified position in the supplied ByteData is a 'null' variable length integer.

readVInt

public static int readVInt(ByteData arr,
           long position)

Read a variable length integer from the supplied ByteData starting at the specified position.

readVInt

public static int readVInt(java.io.InputStream in)
                    throws java.io.IOException

Read a variable length integer from the supplied InputStream

Throws:

java.io.IOException

readVLong

public static long readVLong(ByteData arr,
             long position)

Read a variable length long from the supplied ByteData starting at the specified position.

nextVLongSize

public static int nextVLongSize(ByteData arr,
                long position)

Determine the size (in bytes) of the variable length long in the supplied ByteData, starting at the specified position.

readVLong

public static long readVLong(java.io.InputStream in)
                      throws java.io.IOException

Read a variable length long from the supplied InputStream.

Throws:

java.io.IOException

sizeOfVInt

public static int sizeOfVInt(int value)

Determine the size (in bytes) of the specified value when encoded as a variable length integer.

sizeOfVLong

public static int sizeOfVLong(long value)

Determine the size (in bytes) of the specified value when encoded as a variable length integer.

countVarIntsInRange

public static int countVarIntsInRange(ByteData byteData,
                      long fieldPosition,
                      int length)

Count the number of variable length integers encoded in the supplied ByteData in the specified range.