jadex.commons.transformation.binaryserializer

Class VarInt

java.lang.Object

jadex.commons.transformation.binaryserializer.VarInt

public class VarInt
extends java.lang.Object

Class providing methods for encoding integers (longs) as byte array in a variable-length format.

Constructor Summary

Constructors

Constructor and Description
VarInt()

Method Summary

Modifier and Type	Method and Description
static long	decode(byte[] varint) Decodes a VarInt.
static long	decode(byte[] varint, int offset) Decodes a VarInt.
static long	decodeWithKnownSize(byte[] varint, int offset, byte extsize) Decodes a VarInt when the extension size is known.
static byte[]	encode(long val) Encodes a VarInt.
static void	encode(long val, byte[] buffer, int offset, int size) Encodes a VarInt and saves it in a buffer at the given offset.
static int	getEncodedSize(long val) Determines the encoded size of a value.
static byte	getExtensionSize(byte firstbyte) Returns the number of bytes used for this number past the first byte.
static byte	getExtensionSize(byte[] varint, int offset) Returns the number of bytes used for this number past the first byte.

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

getExtensionSize

public static final byte getExtensionSize(byte[] varint,
                                          int offset)

Returns the number of bytes used for this number past the first byte.

Parameters:

varint - Encoded VarInt.

offset - The offset.

Returns:

Number of bytes belonging to the number after the first byte.

getExtensionSize

public static final byte getExtensionSize(byte firstbyte)

Returns the number of bytes used for this number past the first byte.

Parameters:

firstbyte - First byte of encoded VarInt.

Returns:

Number of bytes belonging to the number after the first byte.

decode

public static final long decode(byte[] varint)

Decodes a VarInt.

Parameters:

varint - The encoded VarInt.

Returns:

The decoded VarInt.

decode

public static final long decode(byte[] varint,
                                int offset)

Decodes a VarInt.

Parameters:

varint - The encoded VarInt.

Returns:

The decoded VarInt.

decodeWithKnownSize

public static final long decodeWithKnownSize(byte[] varint,
                                             int offset,
                                             byte extsize)

Decodes a VarInt when the extension size is known.

Parameters:

varint - The encoded VarInt.

offset - The offset.

The - number of bytes after the first byte.

Returns:

The decoded VarInt.

encode

public static final byte[] encode(long val)

Encodes a VarInt.

Parameters:

val - The value being encoded.

Returns:

Encoded VarInt.

getEncodedSize

public static final int getEncodedSize(long val)

Determines the encoded size of a value.

Parameters:

val - The value.

Returns:

The size of the encoded value.

encode

public static final void encode(long val,
                                byte[] buffer,
                                int offset,
                                int size)

Encodes a VarInt and saves it in a buffer at the given offset.

Parameters:

val - The value being encoded.

buffer - The target buffer.

offset - The buffer offset.

size - Size of the encoded VarInt.