Package org.springframework.batch.item.file.transform

Class RegexLineTokenizer

java.lang.Object

org.springframework.batch.item.file.transform.AbstractLineTokenizer

org.springframework.batch.item.file.transform.RegexLineTokenizer

All Implemented Interfaces:

LineTokenizer

public class RegexLineTokenizer
extends AbstractLineTokenizer

Line-tokenizer using a regular expression to filter out data (by using matching and non-matching groups). Consider the following regex which picks only the first and last name (notice the non-matching group in the middle):

 (.*?)(?: .*)* (.*)
 

For the names:

• "Graham James Edward Miller"
• "Andrew Gregory Macintyre"
• "No MiddleName"

the output will be:

• "Miller", "Graham"
• "Macintyre", "Andrew"
• "MiddleName", "No"

An empty list is returned, in case of a non-match.

Author:

Costin Leau

See Also:

• Matcher.group(int)

Field Summary

Fields inherited from class org.springframework.batch.item.file.transform.AbstractLineTokenizer

names

Constructor Summary

Constructors

Constructor	Description
RegexLineTokenizer()

Method Summary

Modifier and Type	Method	Description
protected List<String>	doTokenize(String line)
void	setPattern(Pattern pattern)	Sets the regex pattern to use.
void	setRegex(String regex)	Sets the regular expression to use.

Methods inherited from class org.springframework.batch.item.file.transform.AbstractLineTokenizer

hasNames, isStrict, setFieldSetFactory, setNames, setStrict, tokenize

Methods inherited from class java.lang.Object

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

Constructor Details

RegexLineTokenizer

public RegexLineTokenizer()

Method Details

doTokenize

protected List<String> doTokenize(String line)

Specified by:

doTokenize in class AbstractLineTokenizer

setPattern

public void setPattern(Pattern pattern)

Sets the regex pattern to use.

Parameters:

pattern - Regular Expression pattern

setRegex

public void setRegex(String regex)

Sets the regular expression to use.

Parameters:

regex - regular expression (as a String)