code: private JsonElement parsePrimitiveType(JsonSchema schema, JsonElement value)
        throws DataConversionException {
  
      if ((schema.isType(NULL) || schema.isNullable()) && value.isJsonNull()) {
        return JsonNull.INSTANCE;
      }
  
      if ((schema.isType(NULL) && !value.isJsonNull()) || (!schema.isType(NULL) && value.isJsonNull())) {
        throw new DataConversionException(
            "Type mismatch for " + value.toString() + " of type " + schema.getDataTypes().toString());
      }
  
      if (schema.isType(FIXED)) {
        int expectedSize = schema.getSizeOfFixedData();
        if (value.getAsString().length() == expectedSize) {
          return value;
        } else {
          throw new DataConversionException(
              "Fixed type value is not same as defined value expected fieldsCount: " + expectedSize);
        }
      } else {
        return value;
      }
    }
docs: Parses primitive types
  @param schema
  @param value
  @return
  @throws DataConversionException