datasource
Class NullSource

java.lang.Object
  datasource.DataSource
      datasource.NullSource

public class NullSource
extends DataSource

A NullSource is a source that returns zeroes, as fast as it can. It's so simple it needs no comments...

Version:

$Id: NullSource.java,v 1.6 2010/01/05 19:02:15 zahorjan Exp $

Field Summary

private int	bytesLeftToSend bytesLeftToSend is how many bytes remain to be sent this use of this Null source.
private int	mySize mySize is how many bytes this Null source should send in total.

Fields inherited from class datasource.DataSource

CLOSED, CONNECTED, STARTING, state

Constructor Summary

NullSource(int bytesToSend)

Method Summary

protected int	readFromSrc(byte[] buf, int len) We're a null source, so we don't actually read anything.
void	reInit() All derived classes must be capable of reinitializing themselves.

Methods inherited from class datasource.DataSource

read, readyToRead

Methods inherited from class java.lang.Object

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

Field Detail

mySize

private int mySize

mySize is how many bytes this Null source should send in total.

bytesLeftToSend

private int bytesLeftToSend

bytesLeftToSend is how many bytes remain to be sent this use of this Null source.

Constructor Detail

NullSource

public NullSource(int bytesToSend)

Method Detail

reInit

public void reInit()

Description copied from class: DataSource

All derived classes must be capable of reinitializing themselves.

Specified by:

reInit in class DataSource

readFromSrc

protected int readFromSrc(byte[] buf,
                          int len)

We're a null source, so we don't actually read anything. We just indicate whether or not all the bytes we represented have been consumed.

Specified by:

readFromSrc in class DataSource