org.apache.commons.io.input

Class BufferedFileChannelInputStream

java.lang.Object

java.io.InputStream

org.apache.commons.io.input.BufferedFileChannelInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public final class BufferedFileChannelInputStream
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.

To build an instance, see BufferedFileChannelInputStream.Builder.

This class was ported and adapted from Apache Spark commit 933dc6cb7b3de1d8ccaf73d124d6eb95b947ed19 where it was called NioBufferedFileInputStream.

Since:

2.9.0

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	BufferedFileChannelInputStream.Builder Builds a new BufferedFileChannelInputStream instance.

Constructor Summary

Constructors

Constructor and Description
BufferedFileChannelInputStream(java.io.File file) Deprecated. Use builder(), BufferedFileChannelInputStream.Builder, and BufferedFileChannelInputStream.Builder.get()
BufferedFileChannelInputStream(java.io.File file, int bufferSize) Deprecated. Use builder(), BufferedFileChannelInputStream.Builder, and BufferedFileChannelInputStream.Builder.get()
BufferedFileChannelInputStream(java.nio.file.Path path) Deprecated. Use builder(), BufferedFileChannelInputStream.Builder, and BufferedFileChannelInputStream.Builder.get()
BufferedFileChannelInputStream(java.nio.file.Path path, int bufferSize) Deprecated. Use builder(), BufferedFileChannelInputStream.Builder, and BufferedFileChannelInputStream.Builder.get()

Method Summary

Modifier and Type	Method and Description
int	available()
static BufferedFileChannelInputStream.Builder	builder() Constructs a new BufferedFileChannelInputStream.Builder.
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 java.lang.Object

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

Constructor Detail

BufferedFileChannelInputStream

@Deprecated
public BufferedFileChannelInputStream(java.io.File file)
                                           throws java.io.IOException

Deprecated. Use builder(), BufferedFileChannelInputStream.Builder, and BufferedFileChannelInputStream.Builder.get()

Constructs a new instance for the given File.

Parameters:

file - The file to stream.

Throws:

java.io.IOException - If an I/O error occurs

BufferedFileChannelInputStream

@Deprecated
public BufferedFileChannelInputStream(java.io.File file,
                                                  int bufferSize)
                                           throws java.io.IOException

Deprecated. Use builder(), BufferedFileChannelInputStream.Builder, and BufferedFileChannelInputStream.Builder.get()

Constructs a new instance for the given File and buffer size.

Parameters:

file - The file to stream.

bufferSize - buffer size.

Throws:

java.io.IOException - If an I/O error occurs

BufferedFileChannelInputStream

@Deprecated
public BufferedFileChannelInputStream(java.nio.file.Path path)
                                           throws java.io.IOException

Deprecated. Use builder(), BufferedFileChannelInputStream.Builder, and BufferedFileChannelInputStream.Builder.get()

Constructs a new instance for the given Path.

Parameters:

path - The path to stream.

Throws:

java.io.IOException - If an I/O error occurs

BufferedFileChannelInputStream

@Deprecated
public BufferedFileChannelInputStream(java.nio.file.Path path,
                                                  int bufferSize)
                                           throws java.io.IOException

Deprecated. Use builder(), BufferedFileChannelInputStream.Builder, and BufferedFileChannelInputStream.Builder.get()

Constructs a new instance for the given Path and buffer size.

Parameters:

path - The path to stream.

bufferSize - buffer size.

Throws:

java.io.IOException - If an I/O error occurs

Method Detail

builder

public static BufferedFileChannelInputStream.Builder builder()

Constructs a new BufferedFileChannelInputStream.Builder.

Returns:

a new BufferedFileChannelInputStream.Builder.

Since:

2.12.0

available

public int available()
              throws java.io.IOException

Overrides:

available 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 java.lang.AutoCloseable

Overrides:

close in class java.io.InputStream

Throws:

java.io.IOException

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

skip

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

Overrides:

skip in class java.io.InputStream

Throws:

java.io.IOException