code: private PatternType readPatternType(JSONValue val) {
  
          PatternType patterntype;
          try {
              String str = readOptionalString(val);
              patterntype = PatternType.valueOf(str);
          } catch (@SuppressWarnings("unused") IllegalArgumentException e) {
              patterntype = PatternType.NONE;
          }
          return patterntype;
      }
docs: Reads the pattern type from the provided JSON. Defaults to type NONE.
  @param val the JSON object containing the pattern type information.
  @return the pattern type.