de.larssh.utils.io

Class MultiInputStream

java.lang.Object

java.io.InputStream

de.larssh.utils.io.MultiInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class MultiInputStream
extends InputStream

A MultiInputStream concatenates multiple InputStreams into one. That might be useful for e.g. reading log files of multiple days.

The inputStreamIterator needs to supply the InputStreams to concatenate one after the other. InputStreams, which have been read, are closed prior requesting the next.

Constructor Summary

Constructors

Constructor and Description
MultiInputStream(Iterator<InputStream> inputStreamIterator) Creates a new MultiInputStream instance.

Method Summary

Modifier and Type	Method and Description
void	close()
int	read()
int	read(byte[] outputBuffer, int offset, int length)

Methods inherited from class java.io.InputStream

available, mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

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

Constructor Detail

MultiInputStream

public MultiInputStream(Iterator<InputStream> inputStreamIterator)

Creates a new MultiInputStream instance.

Parameters:

inputStreamIterator - Iterator, called whenever the next InputStream needs to be supplied. If it has no next element, the MultiInputStream is closed.

Method Detail

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class InputStream

Throws:

IOException

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

read

public int read(@Nullable
                byte[] outputBuffer,
                int offset,
                int length)
         throws IOException

Overrides:

read in class InputStream

Throws:

IOException