org.springframework.classify

Class PatternMatchingClassifier<T>

java.lang.Object

org.springframework.classify.PatternMatchingClassifier<T>

All Implemented Interfaces:

Classifier<java.lang.String,T>

public class PatternMatchingClassifier<T>
extends java.lang.Object
implements Classifier<java.lang.String,T>

A Classifier that maps from String patterns with wildcards to a set of values of a given type. An input String is matched with the most specific pattern possible to the corresponding value in an input map. A default value should be specified with a pattern key of "*".

Field Summary

Fields

Modifier and Type	Field and Description
private PatternMatcher<T>	values

Constructor Summary

Constructors

Constructor and Description
PatternMatchingClassifier() Default constructor.
PatternMatchingClassifier(java.util.Map<java.lang.String,T> values) Create a classifier from the provided map.

Method Summary

Modifier and Type	Method and Description
T	classify(java.lang.String classifiable) Classify the input by matching it against the patterns provided in setPatternMap(Map).
void	setPatternMap(java.util.Map<java.lang.String,T> values) A map from pattern to value

Methods inherited from class java.lang.Object

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

Field Detail

values

private PatternMatcher<T> values

Constructor Detail

PatternMatchingClassifier

public PatternMatchingClassifier()

Default constructor. Use the setter or the other constructor to create a sensible classifier, otherwise all inputs will cause an exception.

PatternMatchingClassifier

public PatternMatchingClassifier(java.util.Map<java.lang.String,T> values)

Create a classifier from the provided map. The keys are patterns, using '?' as a single character and '*' as multi-character wildcard.

Parameters:

values -

Method Detail

setPatternMap

public void setPatternMap(java.util.Map<java.lang.String,T> values)

A map from pattern to value

Parameters:

values - the pattern map to set

classify

public T classify(java.lang.String classifiable)

Classify the input by matching it against the patterns provided in setPatternMap(Map). The most specific pattern that matches will be used to locate a value.

Specified by:

classify in interface Classifier<java.lang.String,T>

Parameters:

classifiable - the input object. Can be null.

Returns:

the value matching the most specific pattern possible

Throws:

java.lang.IllegalStateException - if no matching value is found.