\JLanguageStemmerPorteren

Porter English stemmer class.

This class was adapted from one written by Richard Heyes.
See copyright and link information above.

Synopsis

class JLanguageStemmerPorteren extends JLanguageStemmer {

// members
private $_regex_consonant;
private $_regex_vowel;

// Inherited members from JLanguageStemmer
protected $cache;
protected $instances;

// methods
public string stem()
private static string _step1ab()
private static string _step1c()
private static string _step2()
private static string _step3()
private static string _step4()
private static string _step5()
private static boolean _replace()
private static integer _m()
private static boolean _doubleConsonant()
private static boolean _cvc()

// Inherited methods from JLanguageStemmer
public static JLanguageStemmer getInstance()
public abstract string stem()

}

Hierarchy

Extends

JLanguageStemmer

Members

private

$_regex_consonant — string
Regex for matching a consonant.
$_regex_vowel — string
Regex for matching a vowel

protected

$cache — array
An internal cache of stemmed tokens.
$instances — array

Methods

private

_cvc() — Checks for ending CVC sequence where second C is not W, X or Y
_doubleConsonant() — Returns true/false as to whether the given string contains two of the same consonant next to each other at the end of the string.
_m() — m() measures the number of consonant sequences in $str. if c is a consonant sequence and v a vowel sequence, and <..> indicates arbitrary presence,
_replace() — Replaces the first string with the second, at the end of the string. If third arg is given, then the preceding string must match that m count at least.
_step1ab() — Step 1
_step1c() — Step 1c
_step2() — Step 2
_step3() — Step 3
_step4() — Step 4
_step5() — Step 5

public

stem() — Method to stem a token and return the root.

Inherited from JLanguageStemmer

public

getInstance() — Method to get a stemmer, creating it if necessary.
stem() — Method to stem a token and return the root.