@Override
        protected boolean accept() throws IOException {
            String type = typeAtt.type();
            if (type == UAX29URLEmailTokenizer.TOKEN_TYPES[UAX29URLEmailTokenizer.EMOJI] ||
                    type == UAX29URLEmailTokenizer.TOKEN_TYPES[UAX29URLEmailTokenizer.NUM]) {
                return false;
            }
            return isAlphabetic(termAtt.buffer(), termAtt.length());
        }
Remove tokens that do not contain an alphabetic or ideographic
tika-eval/tika-eval-core/src/main/java/org/apache/tika/eval/core/tokens/AlphaIdeographFilterFactory.java