Package org.springframework.classify

Class PatternMatchingClassifier<T>

java.lang.Object
org.springframework.classify.PatternMatchingClassifier<T>
Type Parameters:
T - the output of the classifier
All Implemented Interfaces:
Serializable, Classifier<String,T>
public class PatternMatchingClassifier<T> extends Object implements Classifier<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 "*".
Author:
Dave Syer
See Also:

  • Constructor Details

    • 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(Map<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 - the values to use in the PatternMatcher

  • Method Details

    • setPatternMap

      public void setPatternMap(Map<String,T> values)
      A map from pattern to value
      Parameters:
      values - the pattern map to set

    • classify

      public T classify(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<String,T>
      Parameters:
      classifiable - the input object. Can be null.
      Returns:
      the value matching the most specific pattern possible
      Throws:
      IllegalStateException - if no matching value is found.