BlockDecompressorStream (Hadoop 1.2.1 API)
Date: 2013-07-22

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## org.apache.hadoop.io.compress
Class BlockDecompressorStream

    java.lang.Object
      java.io.InputStream
          org.apache.hadoop.io.compress.CompressionInputStream
              org.apache.hadoop.io.compress.DecompressorStream
                  org.apache.hadoop.io.compress.BlockDecompressorStream

All Implemented Interfaces:
  Closeable, Seekable

    public class BlockDecompressorStream

extends DecompressorStream

A `DecompressorStream` which works with 'block-based' based compression algorithms, as opposed to 'stream-based' compression algorithms.

Field Summary

Fields inherited from class org.apache.hadoop.io.compress.DecompressorStream
`buffer, closed, decompressor, eof`

Fields inherited from class org.apache.hadoop.io.compress.CompressionInputStream
`in, maxAvailableData`

Constructor Summary
`protected` | `BlockDecompressorStream(InputStream in)`
`` | `BlockDecompressorStream(InputStream in, Decompressor decompressor)` Create a `BlockDecompressorStream`.
`` | `BlockDecompressorStream(InputStream in, Decompressor decompressor, int bufferSize)` Create a `BlockDecompressorStream`.

Method Summary
`protected int` | `decompress(byte[] b, int off, int len)`
`protected int` | `getCompressedData()`
`void` | `resetState()` Reset the decompressor to its initial state and discard any buffered data, as the underlying stream may have been repositioned.

Methods inherited from class org.apache.hadoop.io.compress.DecompressorStream
`available, checkStream, close, mark, markSupported, read, read, reset, skip`

Methods inherited from class org.apache.hadoop.io.compress.CompressionInputStream
`getPos, seek, seekToNewSource`

Methods inherited from class java.io.InputStream
`read`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### BlockDecompressorStream

    public BlockDecompressorStream(InputStream in,
                                   Decompressor decompressor,
                                   int bufferSize)
                            throws IOException

  Create a `BlockDecompressorStream`.

  Parameters:
    `in` - input stream
    `decompressor` - decompressor to use
    `bufferSize` - size of buffer
  Throws:
    `IOException`

### BlockDecompressorStream

    public BlockDecompressorStream(InputStream in,
                                   Decompressor decompressor)
                            throws IOException

  Create a `BlockDecompressorStream`.

  Parameters:
    `in` - input stream
    `decompressor` - decompressor to use
  Throws:
    `IOException`

### BlockDecompressorStream

    protected BlockDecompressorStream(InputStream in)
                               throws IOException

Throws:
  `IOException`

Method Detail

### decompress

    protected int decompress(byte[] b,
                             int off,
                             int len)
                      throws IOException

  Overrides:
    `decompress` in class `DecompressorStream`
  Throws:
    `IOException`

### getCompressedData

    protected int getCompressedData()
                             throws IOException

  Overrides:
    `getCompressedData` in class `DecompressorStream`
  Throws:
    `IOException`

### resetState

    public void resetState()
                    throws IOException

  Description copied from class: `CompressionInputStream`
  Reset the decompressor to its initial state and discard any buffered data, as the underlying stream may have been repositioned.

  Overrides:
    `resetState` in class `DecompressorStream`
  Throws:
    `IOException`

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Copyright © 2009 The Apache Software Foundation