org.apache.spark.io

Class LZ4BlockInputStream

Object

java.io.InputStream

java.io.FilterInputStream

org.apache.spark.io.LZ4BlockInputStream

All Implemented Interfaces:

java.io.Closeable, AutoCloseable

public final class LZ4BlockInputStream
extends java.io.FilterInputStream

InputStream implementation to decode data written with LZ4BlockOutputStream. This class is not thread-safe and does not support mark(int)/reset().

See Also:

This is based on net.jpountz.lz4.LZ4BlockInputStream changes: https://github.com/davies/lz4-java/commit/cc1fa940ac57cc66a0b937300f805d37e2bf8411 TODO: merge this into upstream

Constructor Summary

Constructors

Constructor and Description
LZ4BlockInputStream(java.io.InputStream in) Create a new instance which uses the fastest LZ4FastDecompressor available.
LZ4BlockInputStream(java.io.InputStream in, net.jpountz.lz4.LZ4FastDecompressor decompressor) Create a new instance using XXHash32 for checksuming.
LZ4BlockInputStream(java.io.InputStream in, net.jpountz.lz4.LZ4FastDecompressor decompressor, java.util.zip.Checksum checksum) Create a new InputStream.

Method Summary

Modifier and Type	Method and Description
int	available()
void	mark(int readlimit)
boolean	markSupported()
int	read()
int	read(byte[] b)
int	read(byte[] b, int off, int len)
void	reset()
long	skip(long n)
String	toString()

Methods inherited from class java.io.FilterInputStream

close

Methods inherited from class Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

LZ4BlockInputStream

public LZ4BlockInputStream(java.io.InputStream in,
                           net.jpountz.lz4.LZ4FastDecompressor decompressor,
                           java.util.zip.Checksum checksum)

Create a new InputStream.

Parameters:

in - the InputStream to poll

decompressor - the decompressor instance to use

checksum - the Checksum instance to use, must be equivalent to the instance which has been used to write the stream

LZ4BlockInputStream

public LZ4BlockInputStream(java.io.InputStream in,
                           net.jpountz.lz4.LZ4FastDecompressor decompressor)

Create a new instance using XXHash32 for checksuming.

See Also:

LZ4BlockInputStream(InputStream, LZ4FastDecompressor, Checksum), StreamingXXHash32.asChecksum()

LZ4BlockInputStream

public LZ4BlockInputStream(java.io.InputStream in)

Create a new instance which uses the fastest LZ4FastDecompressor available.

See Also:

LZ4Factory.fastestInstance(), LZ4BlockInputStream(InputStream, LZ4FastDecompressor)

Method Detail

available

public int available()
              throws java.io.IOException

Overrides:

available in class java.io.FilterInputStream

Throws:

java.io.IOException

read

public int read()
         throws java.io.IOException

Overrides:

read in class java.io.FilterInputStream

Throws:

java.io.IOException

read

public int read(byte[] b,
                int off,
                int len)
         throws java.io.IOException

Overrides:

read in class java.io.FilterInputStream

Throws:

java.io.IOException

read

public int read(byte[] b)
         throws java.io.IOException

Overrides:

read in class java.io.FilterInputStream

Throws:

java.io.IOException

skip

public long skip(long n)
          throws java.io.IOException

Overrides:

skip in class java.io.FilterInputStream

Throws:

java.io.IOException

markSupported

public boolean markSupported()

Overrides:

markSupported in class java.io.FilterInputStream

mark

public void mark(int readlimit)

Overrides:

mark in class java.io.FilterInputStream

reset

public void reset()
           throws java.io.IOException

Overrides:

reset in class java.io.FilterInputStream

Throws:

java.io.IOException

toString

public String toString()

Overrides:

toString in class Object