org.springframework.batch.classify
Class BackToBackPatternClassifier<C,T>

java.lang.Object
  org.springframework.batch.classify.BackToBackPatternClassifier<C,T>

All Implemented Interfaces:

Classifier<C,T>

public class BackToBackPatternClassifier<C,T>
extends Object
implements Classifier<C,T>

A special purpose Classifier with easy configuration options for mapping from one arbitrary type of object to another via a pattern matcher.

Author:

Dave Syer

Constructor Summary

BackToBackPatternClassifier()
Default constructor, provided as a convenience for people using setter injection.

BackToBackPatternClassifier(Classifier<C,String> router, Classifier<String,T> matcher)
Set up a classifier with input to the router and output from the matcher.

Method Summary

T	classify(C classifiable) Classify the input and map to a String, then take that and put it into a pattern matcher to match to an output value.
void	setMatcherMap(Map<String,T> map) A convenience method for creating a pattern matching classifier for the matcher component.
void	setRouterDelegate(Object delegate) A convenience method of creating a router classifier based on a plain old Java Object.

Methods inherited from class java.lang.Object

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

Constructor Detail

BackToBackPatternClassifier

public BackToBackPatternClassifier()

Default constructor, provided as a convenience for people using setter injection.

BackToBackPatternClassifier

public BackToBackPatternClassifier(Classifier<C,String> router,
                                   Classifier<String,T> matcher)

Set up a classifier with input to the router and output from the matcher.

Parameters:

router - see setRouterDelegate(Object)

matcher - see setMatcherMap(Map)

Method Detail

setMatcherMap

public void setMatcherMap(Map<String,T> map)

A convenience method for creating a pattern matching classifier for the matcher component.

Parameters:

map - maps pattern keys with wildcards to output values

setRouterDelegate

public void setRouterDelegate(Object delegate)

A convenience method of creating a router classifier based on a plain old Java Object. The object provided must have precisely one public method that either has the @Classifier annotation or accepts a single argument and outputs a String. This will be used to create an input classifier for the router component.

Parameters:

delegate - the delegate object used to create a router classifier

classify

public T classify(C classifiable)

Classify the input and map to a String, then take that and put it into a pattern matcher to match to an output value.

Specified by:

classify in interface Classifier<C,T>

Parameters:

classifiable - the input object. Can be null.

Returns:

an object. Can be null, but implementations should declare if this is the case.