org.springframework.batch.item.file.transform
Class FixedLengthLineAggregator

java.lang.Object
  org.springframework.batch.item.file.transform.FixedLengthLineAggregator

All Implemented Interfaces:

LineAggregator

public class FixedLengthLineAggregator
extends Object
implements LineAggregator

LineAggregator implementation which produces line by aggregating provided strings into columns with fixed length. Columns are specified by array of ranges (setColumns(Range[]).

Author:

tomas.slanina, peter.zozom, Dave Syer

Constructor Summary

FixedLengthLineAggregator()

Method Summary

String	aggregate(FieldSet fieldSet) Aggregate provided strings into single line using specified column ranges.
void	setAlignment(String alignment) Recognized alignments are CENTER, RIGHT, LEFT.
void	setColumns(Range[] columns) Set column ranges.
void	setPadding(char padding) Setter for padding (default is space).

Methods inherited from class java.lang.Object

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

Constructor Detail

FixedLengthLineAggregator

public FixedLengthLineAggregator()

Method Detail

setColumns

public void setColumns(Range[] columns)

Set column ranges. Used in conjunction with the RangeArrayPropertyEditor this property can be set in the form of a String describing the range boundaries, e.g. "1,4,7" or "1-3,4-6,7" or "1-2,4-5,7-10".

Parameters:

columns - array of Range objects which specify column start and end position

aggregate

public String aggregate(FieldSet fieldSet)

Aggregate provided strings into single line using specified column ranges.

Specified by:

aggregate in interface LineAggregator

Parameters:

fieldSet - arrays of strings representing data to be aggregated

Returns:

aggregated strings

setAlignment

public void setAlignment(String alignment)

Recognized alignments are CENTER, RIGHT, LEFT. An IllegalArgumentException is thrown in case the argument does not match any of the recognized values.

Parameters:

alignment - the alignment to be used

setPadding

public void setPadding(char padding)

Setter for padding (default is space).

Parameters:

padding - the padding character