Package org.apache.commons.compress.compressors.lz4

# Class FramedLZ4CompressorOutputStream.Parameters

java.lang.Object
org.apache.commons.compress.compressors.lz4.FramedLZ4CompressorOutputStream.Parameters

Enclosing class:
  FramedLZ4CompressorOutputStream

public static class FramedLZ4CompressorOutputStream.Parameters extends Object
Parameters of the LZ4 frame format.

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `static final FramedLZ4CompressorOutputStream.Parameters`
  `DEFAULT`
  The default parameters of 4M block size, enabled content checksum, disabled block checksums and independent blocks.

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `Parameters(FramedLZ4CompressorOutputStream.BlockSize blockSize)`
  Sets up custom a custom block size for the LZ4 stream but otherwise uses the defaults of enabled content checksum, disabled block checksums and independent blocks.
  `Parameters(FramedLZ4CompressorOutputStream.BlockSize blockSize, boolean withContentChecksum, boolean withBlockChecksum, boolean withBlockDependency)`
  Sets up custom parameters for the LZ4 stream.
  `Parameters(FramedLZ4CompressorOutputStream.BlockSize blockSize, boolean withContentChecksum, boolean withBlockChecksum, boolean withBlockDependency, Parameters lz77params)`
  Sets up custom parameters for the LZ4 stream.
  `Parameters(FramedLZ4CompressorOutputStream.BlockSize blockSize, Parameters lz77params)`
  Sets up custom a custom block size for the LZ4 stream but otherwise uses the defaults of enabled content checksum, disabled block checksums and independent blocks.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `String`
  `toString()`

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

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

- ## Field Details

  - ### DEFAULT

    public static final FramedLZ4CompressorOutputStream.Parameters DEFAULT
    The default parameters of 4M block size, enabled content checksum, disabled block checksums and independent blocks.

    This matches the defaults of the lz4 command line utility.

- ## Constructor Details

  - ### Parameters

    public Parameters(FramedLZ4CompressorOutputStream.BlockSize blockSize)
    Sets up custom a custom block size for the LZ4 stream but otherwise uses the defaults of enabled content checksum, disabled block checksums and independent blocks.
    Parameters:
      `blockSize` - the size of a single block.

  - ### Parameters

    public Parameters(FramedLZ4CompressorOutputStream.BlockSize blockSize, boolean withContentChecksum, boolean withBlockChecksum, boolean withBlockDependency)
    Sets up custom parameters for the LZ4 stream.
    Parameters:
      `blockSize` - the size of a single block.
      `withContentChecksum` - whether to write a content checksum
      `withBlockChecksum` - whether to write a block checksum. Note that block checksums are not supported by the lz4 command line utility
      `withBlockDependency` - whether a block may depend on the content of a previous block. Enabling this may improve compression ratio but makes it impossible to decompress the output in parallel.

  - ### Parameters

    public Parameters(FramedLZ4CompressorOutputStream.BlockSize blockSize, boolean withContentChecksum, boolean withBlockChecksum, boolean withBlockDependency, Parameters lz77params)
    Sets up custom parameters for the LZ4 stream.
    Parameters:
      `blockSize` - the size of a single block.
      `withContentChecksum` - whether to write a content checksum
      `withBlockChecksum` - whether to write a block checksum. Note that block checksums are not supported by the lz4 command line utility
      `withBlockDependency` - whether a block may depend on the content of a previous block. Enabling this may improve compression ratio but makes it impossible to decompress the output in parallel.
      `lz77params` - parameters used to fine-tune compression, in particular to balance compression ratio vs compression speed.

  - ### Parameters

    public Parameters(FramedLZ4CompressorOutputStream.BlockSize blockSize, Parameters lz77params)
    Sets up custom a custom block size for the LZ4 stream but otherwise uses the defaults of enabled content checksum, disabled block checksums and independent blocks.
    Parameters:
      `blockSize` - the size of a single block.
      `lz77params` - parameters used to fine-tune compression, in particular to balance compression ratio vs compression speed.

- ## Method Details

  - ### toString

    public String toString()
    Overrides:
      `toString` in class `Object`