RegexLineTokenizer (Spring Batch 4.1.4.RELEASE API)

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

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected java.util.List<java.lang.String>`	`doTokenize(java.lang.String line)`
`void`	`setPattern(java.util.regex.Pattern pattern)`	Sets the regex pattern to use.
`void`	`setRegex(java.lang.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 Detail
  - RegexLineTokenizer
```
public RegexLineTokenizer()
```
- Method Detail
  - doTokenize
```
protected java.util.List<java.lang.String> doTokenize(java.lang.String line)
```
    Specified by:
    doTokenize in class AbstractLineTokenizer
  - setPattern
```
public void setPattern(java.util.regex.Pattern pattern)
```
    Sets the regex pattern to use.
    Parameters:
    pattern - Regular Expression pattern
  - setRegex
```
public void setRegex(java.lang.String regex)
```
    Sets the regular expression to use.
    Parameters:
    regex - regular expression (as a String)