Package com.gengoai.hermes.extraction.keyword

Class TextRank

java.lang.Object

com.gengoai.hermes.extraction.keyword.TextRank

All Implemented Interfaces:

Extractor, KeywordExtractor, Serializable

public class TextRank
extends Object
implements KeywordExtractor

Implementation of the TextRank algorithm for keyword extraction as defined in: Mihalcea, R., Tarau, P.: "Textrank: Bringing order into texts". In: Lin, D., Wu, D. (eds.) Proceedings of EMNLP 2004. pp. 404–411. Association for Computational Linguistics, Barcelona, Spain. July 2004. Currently supports unweighted undirected graphs.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
TextRank()

Method Summary

Modifier and Type	Method	Description
Extraction	extract(@NonNull HString hString)	Generate an Extraction from the given HString.
void	fit(@NonNull DocumentCollection corpus)	In certain cases a keyword extractor needs to collect corpus level statistics or construct a model of what a good keyword looks like.

Methods inherited from class java.lang.Object

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

Constructor Detail

TextRank

public TextRank()

Method Detail

extract

public Extraction extract(@NonNull
                          @NonNull HString hString)

Description copied from interface: Extractor

Generate an Extraction from the given HString.

Specified by:

extract in interface Extractor

Parameters:

hString - the source text from which we will generate an Extraction

Returns:

the Extraction

fit

public void fit(@NonNull
                @NonNull DocumentCollection corpus)

Description copied from interface: KeywordExtractor

In certain cases a keyword extractor needs to collect corpus level statistics or construct a model of what a good keyword looks like. The fit method allows implementations to perform this logic at a corpus level.

Specified by:

fit in interface KeywordExtractor

Parameters:

corpus - the corpus to fit the extractor to