Package org.apache.spark.io

Class NioBufferedFileInputStream

Object

java.io.InputStream

org.apache.spark.io.NioBufferedFileInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public final class NioBufferedFileInputStream
extends 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	Description
NioBufferedFileInputStream(File file)
NioBufferedFileInputStream(File file, int bufferSizeInBytes)

Method Summary

Modifier and Type	Method	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, nullInputStream, read, readAllBytes, readNBytes, readNBytes, reset, skipNBytes, transferTo

Methods inherited from class java.lang.Object

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

Constructor Details

NioBufferedFileInputStream

public NioBufferedFileInputStream(File file,
 int bufferSizeInBytes)
                           throws IOException

Throws:

IOException

NioBufferedFileInputStream

public NioBufferedFileInputStream(File file)
                           throws IOException

Throws:

IOException

Method Details

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

read

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

Overrides:

read in class InputStream

Throws:

IOException

available

public int available()
              throws IOException

Overrides:

available in class InputStream

Throws:

IOException

skip

public long skip(long n)
          throws IOException

Overrides:

skip in class InputStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class InputStream

Throws:

IOException