org.apache.lucene.classification
Interface Classifier<T>

All Known Implementing Classes:

KNearestNeighborClassifier, SimpleNaiveBayesClassifier

public interface Classifier<T>

A classifier, see http://en.wikipedia.org/wiki/Classifier_(mathematics), which assign classes of type T

WARNING: This API is experimental and might change in incompatible ways in the next release.

Method Summary

ClassificationResult<T>	assignClass(String text) Assign a class (with score) to the given text String
void	train(AtomicReader atomicReader, String textFieldName, String classFieldName, Analyzer analyzer) Train the classifier using the underlying Lucene index

Method Detail

assignClass

ClassificationResult<T> assignClass(String text)
                                    throws IOException

Assign a class (with score) to the given text String

Parameters:

text - a String containing text to be classified

Returns:

a ClassificationResult holding assigned class of type T and score

Throws:

IOException - If there is a low-level I/O error.

train

void train(AtomicReader atomicReader,
           String textFieldName,
           String classFieldName,
           Analyzer analyzer)
           throws IOException

Train the classifier using the underlying Lucene index

Parameters:

atomicReader - the reader to use to access the Lucene index

textFieldName - the name of the field used to compare documents

classFieldName - the name of the field containing the class assigned to documents

analyzer - the analyzer used to tokenize / filter the unseen text

Throws:

IOException - If there is a low-level I/O error.