class Ferret::Analysis::LowerCaseFilter

Summary¶ ↑

LowerCaseFilter normalizes a token's text to lowercase based on the current locale.

Example¶ ↑

["One", "TWO", "three", "RÉSUMÉ"] => ["one", "two", "three", "résumé"]

Public Class Methods

new(token_stream) → token_stream click to toggle source

Create an LowerCaseFilter which normalizes a token's text to lowercase based on the current locale.

static VALUE
frb_lowercase_filter_init(VALUE self, VALUE rsub_ts) 
{
    TokenStream *ts = frb_get_cwrapped_rts(rsub_ts);
#ifndef POSH_OS_WIN32
    if (!frb_locale) frb_locale = setlocale(LC_CTYPE, "");
#endif
    ts = mb_lowercase_filter_new(ts);
    object_add(&(TkFilt(ts)->sub_ts), rsub_ts);

    Frt_Wrap_Struct(self, &frb_tf_mark, &frb_tf_free, ts);
    object_add(ts, self);
    return self;
}