public static boolean contains(String dictionaryPath) {
    if (CACHE != null) {
      return CACHE.asMap().containsKey(dictionaryPath);
    }
    return false;
  }
Load a dictionary or return a previously cached load.
@param conf configuration
@param path the hadoop Path where the dictionary is located, as a String
@return the dictionary bytes if successful, null otherwise
hbase-common/src/main/java/org/apache/hadoop/hbase/io/compress/DictionaryCache.java