public void setDigest(String digest) {
        LOG.info("As of Tika 2.5.0, you can set the digester via the AutoDetectParserConfig in " + "tika-config.xml. We plan to remove this commandline option in 2.8.0");
        this.digest = digest;
    }
digest configuration string, e.g. md5 or sha256, alternately w 16 or 32 encoding,
e.g. md5:32,sha256:16 would result in two digests per file

@return
tika-server/tika-server-core/src/main/java/org/apache/tika/server/core/TikaServerConfig.java