org.modeshape.sequencer.text
Class FixedWidthTextSequencer

java.lang.Object
  org.modeshape.sequencer.text.AbstractTextSequencer
      org.modeshape.sequencer.text.FixedWidthTextSequencer

All Implemented Interfaces:

StreamSequencer

public class FixedWidthTextSequencer
extends AbstractTextSequencer

An text sequencer implementation that uses a list of column numbers to split incoming rows into fixed-width columns. By default, this class treats each row as a single column. There is an implicit column start index of 0 for the first column.

See Also:

AbstractTextSequencer

Constructor Summary

FixedWidthTextSequencer()

Method Summary

protected String[]	parseLine(String line) Parse the given row into its constituent columns.
void	setColumnStartPositions(int[] columnStartPositions) Set the column start positions.
void	setColumnStartPositions(String commaDelimitedColumnStartPositions) Set the column start positions from a list of column start positions concatenated into a single, comma-delimited string.

Methods inherited from class org.modeshape.sequencer.text.AbstractTextSequencer

createRowFactory, getCommentMarker, getMaximumLinesToRead, getRowFactoryClassName, sequence, setCommentMarker, setMaximumLinesToRead, setRowFactoryClassName

Methods inherited from class java.lang.Object

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

Constructor Detail

FixedWidthTextSequencer

public FixedWidthTextSequencer()

Method Detail

setColumnStartPositions

public void setColumnStartPositions(int[] columnStartPositions)

Set the column start positions. The column start positions are 0-based. Everything before the first start position is treated as the first column.

As an example, if the column start positions were {3, 6, 15} and the incoming stream was:

           1         2
 012345678901234567890
 supercallifragilistic
 expialidocious
 

This sequencer would return the following rows:

 row 1: "sup", "erc", "allifragi", "listic"
 row 2: "exp:, "ial", "idocious"
 

Note that there are only three columns returned in the second row, as there were not enough characters to reach the third start position.

Parameters:

columnStartPositions - the column startPositions; may not be null

setColumnStartPositions

public void setColumnStartPositions(String commaDelimitedColumnStartPositions)

Set the column start positions from a list of column start positions concatenated into a single, comma-delimited string.

Parameters:

commaDelimitedColumnStartPositions - a list of column start positions concatenated into a single, comma-delimited string; may not be null

See Also:

setColumnStartPositions(int[])

parseLine

protected String[] parseLine(String line)

Description copied from class: AbstractTextSequencer

Parse the given row into its constituent columns.

Specified by:

parseLine in class AbstractTextSequencer

Parameters:

line - the row to be parsed

Returns:

an array of columns; never null