Package jadex.binary

Class VarInt

java.lang.Object
jadex.binary.VarInt
public class VarInt extends Object
Class providing methods for encoding integers (longs) as byte array in a variable-length format.

  • Constructor Summary

    Constructors
    Constructor
    Description
    VarInt()
     

  • Method Summary

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

    • VarInt

      public VarInt()

  • Method Details

    • 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.