org.apache.mina.codec.delimited.ints

## Class RawInt32

- java.lang.Object
- - org.apache.mina.codec.delimited.ints.RawInt32

- All Implemented Interfaces:
    IntTranscoder

      public final class RawInt32
      extends Object
      implements IntTranscoder

  Class providing raw/canonical representation of integers.

  ## RawInt32 encoder and decoder

  This pair provides a mechanism called canonical form serialization. In this representations all 32-bits integer are encoded over 4 bytes. This library provides two variants big-endian and small-endian. In both cases, the inner bits of each byte are ordered from the most to the least significant bit. The difference between the two variants is the ordering of the four bytes.

  - Big-endian: The bytes are ordered from the most to the least significant one
  - Little-endian: The bytes are ordered from the least to the most significant one

  This representation is often used since it is used internally in CPUs, therefore programmers using a low level languages (assembly, C, ...) appreciate using it (for ease of use or performance reasons). When integers are directly copied from memory, it is required to ensure this serializer uses the appropriate endianness on both ends.

  - Big-endian: 68k, MIPS, Alpha, SPARC
  - Little-endian: x86, x86-64, ARM
  - Bi-endian (depends of the operating system): PowerPC, Itanium

  More details availabile on the Wikipedia "Endianness page".

  ## On-wire representation

  Encoding of the value 67305985

  Big-Endian variant: 0000 0100 0000 0011 0000 0010 0000 0001 ‾‾‾‾↓‾‾‾‾ ‾‾‾‾↓‾‾‾‾ ‾‾‾‾↓‾‾‾‾ ‾‾‾‾↓‾‾‾‾ 4 3 2 1 // 4·224 + 3·216 + 2·28 + 1·20 = 67305985 Little-Endian variant: 0000 0001 0000 0010 0000 0011 0000 0100 ‾‾‾‾↓‾‾‾‾ ‾‾‾‾↓‾‾‾‾ ‾‾‾‾↓‾‾‾‾ ‾‾‾‾↓‾‾‾‾ 1 2 3 4 // 1·20 + 2·28 + 3·216 + 4·224 = 67305985

  n.b. This class doesn't have any dependency against Apache Thrift or any other library in order to provide this convenient integer serialization module to any software using FramedMINA.

  Author:
    Apache MINA Project

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `RawInt32(ByteOrder bo)`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `IoBufferDecoder<Integer>` | `getDecoder()`
    `ByteBufferEncoder<Integer>` | `getEncoder()`

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### RawInt32

          public RawInt32(ByteOrder bo)

  - ### Method Detail

    - #### getDecoder

          public IoBufferDecoder<Integer> getDecoder()

      Specified by:
        `getDecoder` in interface `IntTranscoder`

    - #### getEncoder

          public ByteBufferEncoder<Integer> getEncoder()

      Specified by:
        `getEncoder` in interface `IntTranscoder`

Copyright © 2009–2013 Apache MINA Project. All rights reserved.