com.jmw.tzap.filters
Class ExtractLinesFilter

java.lang.Object
  com.jmw.tzap.AbstractFilter
      com.jmw.tzap.IteratingFilter
          com.jmw.tzap.filters.ExtractLinesFilter

public class ExtractLinesFilter
extends IteratingFilter

Extracts a given number of lines from a buffer and drops the rest.

Field Summary

protected int	count
protected int	fileCount
protected int	lines
protected boolean	replaceFirst

Fields inherited from class com.jmw.tzap.AbstractFilter

encoding, MSG_DEBUG, MSG_ERR, MSG_INFO, MSG_VERBOSE, MSG_WARN, task

Constructor Summary

ExtractLinesFilter()

Method Summary

java.lang.StringBuffer	doFilter(java.lang.StringBuffer sb, java.lang.String fileName) Extracts the lines from the buffer and returns only those extracted lines.
void	setLines(int lines) Sets the number of lines to extract
void	unload() Does any clean up after the filter has been finished.
void	validateParameters() Validates any parameters needed by the child filters.

Methods inherited from class com.jmw.tzap.IteratingFilter

execute, load

Methods inherited from class com.jmw.tzap.AbstractFilter

getName, log, log, setEncoding, setTask

Methods inherited from class java.lang.Object

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

Field Detail

lines

protected int lines

count

protected int count

fileCount

protected int fileCount

replaceFirst

protected boolean replaceFirst

Constructor Detail

ExtractLinesFilter

public ExtractLinesFilter()

Method Detail

unload

public void unload()

Description copied from class: AbstractFilter

Does any clean up after the filter has been finished. Note; Only called once, when all files have been filtered.

Overrides:

unload in class IteratingFilter

doFilter

public java.lang.StringBuffer doFilter(java.lang.StringBuffer sb,
                                       java.lang.String fileName)

Extracts the lines from the buffer and returns only those extracted lines.

Specified by:

doFilter in class IteratingFilter

Parameters:

sb - the file to be filtered as a StringBuffer

fileName - the name that this file is called on disk

Returns:

the filtered file as a StringBuffer

validateParameters

public void validateParameters()
                        throws java.lang.Exception

Description copied from class: AbstractFilter

Validates any parameters needed by the child filters.

Specified by:

validateParameters in class AbstractFilter

Throws:

java.lang.Exception

setLines

public void setLines(int lines)

Sets the number of lines to extract

Parameters:

lines - the string to replace the regex with