de.larssh.utils.io

Class MultiReader

java.lang.Object

java.io.Reader

de.larssh.utils.io.MultiReader

All Implemented Interfaces:

Closeable, AutoCloseable, Readable

public class MultiReader
extends Reader

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

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

Field Summary

Fields inherited from class java.io.Reader

lock

Constructor Summary

Constructors

Constructor and Description
MultiReader(Iterator<Reader> readerIterator) Creates a new MultiReader instance.

Method Summary

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

Methods inherited from class java.io.Reader

mark, markSupported, read, read, read, reset, skip

Methods inherited from class java.lang.Object

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

Constructor Detail

MultiReader

public MultiReader(Iterator<Reader> readerIterator)

Creates a new MultiReader instance.

Parameters:

readerIterator - Iterator, called whenever the next Reader needs to be supplied. If it has no next element, the MultiReader is closed.

Method Detail

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in class Reader

Throws:

IOException

read

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

Specified by:

read in class Reader

Throws:

IOException

ready

public boolean ready()
              throws IOException

Overrides:

ready in class Reader

Throws:

IOException