org.apache.spark.io

Class NioBufferedFileInputStream

Object

java.io.InputStream

org.apache.spark.io.NioBufferedFileInputStream

All Implemented Interfaces:

java.io.Closeable, AutoCloseable

public final class NioBufferedFileInputStream
extends java.io.InputStream

InputStream implementation which uses direct buffer to read a file to avoid extra copy of data between Java and native memory which happens when using BufferedInputStream. Unfortunately, this is not something already available in JDK, sun.nio.ch.ChannelInputStream supports reading a file using nio, but does not support buffering.

Constructor Summary

Constructors

Constructor and Description
NioBufferedFileInputStream(java.io.File file)
NioBufferedFileInputStream(java.io.File file, int bufferSizeInBytes)

Method Summary

Modifier and Type	Method and Description
int	available()
void	close()
int	read()
int	read(byte[] b, int offset, int len)
long	skip(long n)

Methods inherited from class java.io.InputStream

mark, markSupported, read, reset

Methods inherited from class Object

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

Constructor Detail

NioBufferedFileInputStream

public NioBufferedFileInputStream(java.io.File file,
                                  int bufferSizeInBytes)
                           throws java.io.IOException

Throws:

java.io.IOException

NioBufferedFileInputStream

public NioBufferedFileInputStream(java.io.File file)
                           throws java.io.IOException

Throws:

java.io.IOException

Method Detail

read

public int read()
         throws java.io.IOException

Specified by:

read in class java.io.InputStream

Throws:

java.io.IOException

read

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

Overrides:

read in class java.io.InputStream

Throws:

java.io.IOException

available

public int available()
              throws java.io.IOException

Overrides:

available in class java.io.InputStream

Throws:

java.io.IOException

skip

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

Overrides:

skip in class java.io.InputStream

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class java.io.InputStream

Throws:

java.io.IOException