/**
* Method to get the base word of a token. This method uses the public
* {@link FinderIndexerHelper::$stemmer} object if it is set. If no stemmer is set,
* the original token is returned.
*
* @param string $token The token to stem.
* @param string $lang The language of the token.
*
* @return string The root token.
*
* @since 2.5
*/
public static function stem($token, $lang)
{
// Trim apostrophes at either end of the token.
$token = StringHelper::trim($token, '\'');
// Trim everything after any apostrophe in the token.
if (($pos = StringHelper::strpos($token, '\'')) !== false) {
$token = StringHelper::substr($token, 0, $pos);
}
// Stem the token if we have a valid stemmer to use.
if (static::$stemmer instanceof FinderIndexerStemmer) {
return static::$stemmer->stem($token, $lang);
}
return $token;
}
