org.freehep.util.io
Class LineNumberWriter

java.lang.Object
  java.io.Writer
      org.freehep.util.io.LineNumberWriter

All Implemented Interfaces:

Closeable, Flushable, Appendable

public class LineNumberWriter
extends Writer

Counts line numbers, based on the first cr-lf, cr or lf it finds. Informs a listener when the linenumber exceeds a threshold. Listeners can only be informed from the second line only.

Version:

$Id: LineNumberWriter.java 8584 2006-08-10 23:06:37Z duns $

Author:

Mark Donszelmann

Nested Class Summary

static class	LineNumberWriter.LineNumberEvent Event to be used by the LineNumberListener interface.
static interface	LineNumberWriter.LineNumberListener LineNumberListener interface can inform a listener about changes in the line number, or when a linenumber limit has been reached.

Field Summary

Fields inherited from class java.io.Writer

lock

Constructor Summary

LineNumberWriter(Writer out)
Creates a Line Number Writer

Method Summary

void	addLineNumberListener(LineNumberWriter.LineNumberListener listener, int lineNoLimit) Add a LineNumberListener
void	close()
void	flush()
int	getLineNumber() Returns the line number that is currently being written.
void	setLineNumber(int lineNo) Set the current line number
void	write(char[] cbuf)
void	write(char[] cbuf, int off, int len)
void	write(int c)
void	write(String str)
void	write(String str, int off, int len)

Methods inherited from class java.io.Writer

append, append, append, append, append, append

Methods inherited from class java.lang.Object

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

Constructor Detail

LineNumberWriter

public LineNumberWriter(Writer out)

Creates a Line Number Writer

Parameters:

out - writer to write to

Method Detail

write

public void write(char[] cbuf)
           throws IOException

Overrides:

write in class Writer

Throws:

IOException

write

public void write(char[] cbuf,
                  int off,
                  int len)
           throws IOException

Specified by:

write in class Writer

Throws:

IOException

write

public void write(String str)
           throws IOException

Overrides:

write in class Writer

Throws:

IOException

write

public void write(String str,
                  int off,
                  int len)
           throws IOException

Overrides:

write in class Writer

Throws:

IOException

write

public void write(int c)
           throws IOException

Overrides:

write in class Writer

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in class Writer

Throws:

IOException

flush

public void flush()
           throws IOException

Specified by:

flush in interface Flushable

Specified by:

flush in class Writer

Throws:

IOException

getLineNumber

public int getLineNumber()

Returns the line number that is currently being written.

Returns:

current line number

setLineNumber

public void setLineNumber(int lineNo)

Set the current line number

Parameters:

lineNo - new line number

addLineNumberListener

public void addLineNumberListener(LineNumberWriter.LineNumberListener listener,
                                  int lineNoLimit)
                           throws TooManyListenersException

Add a LineNumberListener

Parameters:

listener - new listener

lineNoLimit - line number for which to generate a LineNumberEvent

Throws:

TooManyListenersException - if there is more than one listener