Package it.unimi.dsi.io

Class MultipleInputStream

java.lang.Object

java.io.InputStream

it.unimi.dsi.io.MultipleInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class MultipleInputStream
extends InputStream

A multiple input stream.

Instances of this class encapsulate a sequence of input streams. When one of the streams is exhausted, the multiple stream behaves as if on an end of file. However, after calling reset() the stream is again readable, and positioned at the start of the following stream.

Method Summary

Modifier and Type	Method	Description
int	available()
void	close()
static InputStream	getStream(InputStream[] inputStream)	Returns an input stream encapsulating a nonempty array of input streams.
static InputStream	getStream(InputStream[] inputStream, int offset, int length)	Returns an input stream encapsulating a nonempty fragment of an array of input streams.
boolean	markSupported()
int	read()
int	read(byte[] b)
int	read(byte[] b, int off, int len)
void	reset()
long	skip(long n)

Methods inherited from class java.io.InputStream

mark, nullInputStream, readAllBytes, readNBytes, readNBytes, skipNBytes, transferTo

Methods inherited from class java.lang.Object

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

Method Details

getStream

public static InputStream getStream(InputStream[] inputStream,
 int offset,
 int length)

Returns an input stream encapsulating a nonempty fragment of an array of input streams.

Parameters:

inputStream - an array of input streams, that will be encapsulated.

offset - the first input stream that will be encapsulated.

length - the number of input streams to be encapsulated.

Returns:

an input stream encapsulating the argument streams (the only argument, if length is 1).

getStream

public static InputStream getStream(InputStream[] inputStream)

Returns an input stream encapsulating a nonempty array of input streams.

Note that if inputStream.length is 1 this method will return the only stream that should be encapsulated.

Parameters:

inputStream - an array of input streams, that will be encapsulated.

Returns:

an input stream encapsulating the argument streams (the only argument, if the length is 1).

available

public int available()
              throws IOException

Overrides:

available 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

markSupported

public boolean markSupported()

Overrides:

markSupported in class InputStream

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

read

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

Overrides:

read in class InputStream

Throws:

IOException

read

public int read(byte[] b)
         throws IOException

Overrides:

read in class InputStream

Throws:

IOException

reset

public void reset()
           throws IOException

Overrides:

reset in class InputStream

Throws:

IOException

skip

public long skip(long n)
          throws IOException

Overrides:

skip in class InputStream

Throws:

IOException