code: public static String getTypeCodeSignature(int typeCode) {
          String signature = Values.PRIMITIVE_TYPE_CODE_SIGS.get((byte) typeCode);
          return signature == null ? Values.SIG_JAVA_LANG_OBJECT : signature;
      }
docs: converts a primitive type code to a signature
  
  @param typeCode
  the raw JVM type value
  @return the signature of the type