Package weka.core.stemmers

Class LovinsStemmer

  • All Implemented Interfaces:
    java.io.Serializable, RevisionHandler, Stemmer, TechnicalInformationHandler
    Direct Known Subclasses:
    IteratedLovinsStemmer
    public class LovinsStemmer
extends java.lang.Object
implements Stemmer, TechnicalInformationHandler
    A stemmer based on the Lovins stemmer, described here:

    Julie Beth Lovins (1968). Development of a stemming algorithm. Mechanical Translation and Computational Linguistics. 11:22-31.

    BibTeX: 

     @article{Lovins1968,
    author = {Julie Beth Lovins},
    journal = {Mechanical Translation and Computational Linguistics},
    pages = {22-31},
    title = {Development of a stemming algorithm},
    volume = {11},
    year = {1968}
 }

    Version:
    $Revision: 1.7 $
    Author:
    Eibe Frank (eibe at cs dot waikato dot ac dot nz)
    See Also:
    Serialized Form

    • Constructor Summary

      Constructors 
      Constructor Description
      LovinsStemmer()  

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.lang.String getRevision()
      Returns the revision string.
      TechnicalInformation getTechnicalInformation()
      Returns an instance of a TechnicalInformation object, containing detailed information about the technical background of this class, e.g., paper reference or book this class is based on.
      java.lang.String globalInfo()
      Returns a string describing the stemmer
      static void main​(java.lang.String[] args)
      Runs the stemmer with the given options
      java.lang.String stem​(java.lang.String word)
      Returns the stemmed version of the given word.
      java.lang.String stemString​(java.lang.String str)
      Stems everything in the given string.
      java.lang.String toString()
      returns a string representation of the stemmer

      • Methods inherited from class java.lang.Object

        equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

    • Constructor Detail

      • LovinsStemmer

        public LovinsStemmer()

    • Method Detail

      • globalInfo

        public java.lang.String globalInfo()
        Returns a string describing the stemmer
        Returns:
        a description suitable for displaying in the explorer/experimenter gui

      • getTechnicalInformation

        public TechnicalInformation getTechnicalInformation()
        Returns an instance of a TechnicalInformation object, containing detailed information about the technical background of this class, e.g., paper reference or book this class is based on.
        Specified by:
        getTechnicalInformation in interface TechnicalInformationHandler
        Returns:
        the technical information about this class

      • stem

        public java.lang.String stem​(java.lang.String word)
        Returns the stemmed version of the given word. Word is converted to lower case before stemming.
        Specified by:
        stem in interface Stemmer
        Parameters:
        word - a string consisting of a single word
        Returns:
        the stemmed word

      • stemString

        public java.lang.String stemString​(java.lang.String str)
        Stems everything in the given string. String is converted to lower case before stemming.
        Parameters:
        str - the string to stem
        Returns:
        the processed string

      • toString

        public java.lang.String toString()
        returns a string representation of the stemmer
        Overrides:
        toString in class java.lang.Object
        Returns:
        a string representation of the stemmer

      • getRevision

        public java.lang.String getRevision()
        Returns the revision string.
        Specified by:
        getRevision in interface RevisionHandler
        Returns:
        the revision

      • main

        public static void main​(java.lang.String[] args)
        Runs the stemmer with the given options
        Parameters:
        args - the options