Package 

Class ByteBlockDevice

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description
    • Method Summary

      Modifier and Type Method Description
      Integer getBlockSize() Returns the block size of the block device.
      Long getBlocks() The size of the block device, in blocks of blockSize bytes,
      Unit init() Initializes the block device for further use.
      Unit read(Long byteOffset, ByteBuffer dest) Reads from the block device at a certain offset into the given buffer.
      Unit write(Long byteOffset, ByteBuffer src) Writes to the block device at a certain offset from the given buffer.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Method Detail

      • getBlockSize

         Integer getBlockSize()

        Returns the block size of the block device. Every block device can only read and store bytes in a specific block with a certain size.

        That means that it is only possible to read or write whole blocks!

      • getBlocks

         Long getBlocks()

        The size of the block device, in blocks of blockSize bytes,

      • init

         Unit init()

        Initializes the block device for further use. This method should be called before doing anything else on the block device.

      • read

         Unit read(Long byteOffset, ByteBuffer dest)

        Reads from the block device at a certain offset into the given buffer. The amount of bytes to be read are determined by java.nio.ByteBuffer.remaining.

        The deviceOffset can either be the amount of bytes or a logical block addressing using the block size. To get the bytes in the last case you have to multiply the lba with the block size (offset * .getBlockSize).

        Parameters:
        byteOffset - The offset where the reading should begin.
        dest - The buffer where the data should be read into.
      • write

         Unit write(Long byteOffset, ByteBuffer src)

        Writes to the block device at a certain offset from the given buffer. The amount of bytes to be written are determined by java.nio.ByteBuffer.remaining.

        The deviceOffset can either be the amount of bytes or a logical block addressing using the block size. To get the bytes in the last case you have to multiply the lba with the block size (offset * .getBlockSize).

        Parameters:
        byteOffset - The offset where the writing should begin.
        src - The buffer with the data to be transferred.