@Override
    public TokenStream create(TokenStream tokenStream) {
        return new URLEmailFilter(tokenStream);
    }
Factory for filter that normalizes urls and emails to __url__ and __email__
respectively.  <b>WARNING:</b>This will not work correctly unless the
{@link UAX29URLEmailTokenizer} is used!  This must be run _before_ the
{@link AlphaIdeographFilterFactory}, or else the emails/urls will already
be removed!
tika-eval/tika-eval-core/src/main/java/org/apache/tika/eval/core/tokens/URLEmailNormalizingFilterFactory.java