Package edu.cornell.mannlib.vitro.webapp.utils

Class Stemmer

  • public class Stemmer
extends Object
    Stemmer, implementing the Porter Stemming Algorithm The Stemmer class transforms a word into its root form. The input word can be provided a character at time (by calling add()), or at once by calling one of the various stem(something) methods.

    • Constructor Summary

      Constructors 
      Constructor Description
      Stemmer()  

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void add​(char ch)
      Add a character to the word being stemmed.
      void add​(char[] w, int wLen)
      Adds wLen characters to the word being stemmed contained in a portion of a char[] array.
      char[] getResultBuffer()
      Returns a reference to a character buffer containing the results of the stemming process.
      int getResultLength()
      Returns the length of the word resulting from the stemming process.
      static void main​(String[] args)  
      void stem()
      Stem the word placed into the Stemmer buffer through calls to add().
      static String StemString​(String inputStr, int maxLength)  
      String toString()
      After a word has been stemmed, it can be retrieved by toString(), or a reference to the internal buffer can be retrieved by getResultBuffer and getResultLength (which is generally more efficient.)

    • Constructor Detail

      • Stemmer

        public Stemmer()

    • Method Detail

      • add

        public void add​(char ch)
        Add a character to the word being stemmed. When you are finished adding characters, you can call stem(void) to stem the word.

      • add

        public void add​(char[] w,
                int wLen)
        Adds wLen characters to the word being stemmed contained in a portion of a char[] array. This is like repeated calls of add(char ch), but faster.

      • toString

        public String toString()
        After a word has been stemmed, it can be retrieved by toString(), or a reference to the internal buffer can be retrieved by getResultBuffer and getResultLength (which is generally more efficient.)
        Overrides:
        toString in class Object

      • getResultLength

        public int getResultLength()
        Returns the length of the word resulting from the stemming process.

      • getResultBuffer

        public char[] getResultBuffer()
        Returns a reference to a character buffer containing the results of the stemming process. You also need to consult getResultLength() to determine the length of the result.

      • stem

        public void stem()
        Stem the word placed into the Stemmer buffer through calls to add(). Returns true if the stemming process resulted in a word different from the input. You can retrieve the result with getResultLength()/getResultBuffer() or toString().

      • StemString

        public static String StemString​(String inputStr,
                                int maxLength)

      • main

        public static void main​(String[] args)