validateInstance function

Implementation

ValidationResult validateInstance(
  List<ValidationData> validationDatas, {
  bool stopWhenFirstError = true,
}) {
  final validationErrors = List<ValidationError>.empty(
    growable: true,
  );
  for (final validationData in validationDatas) {
    final valueToValidate = validationData.valueToValidate;
    for (final validationMetadata in validationData.annotations) {
      String? error;
      try {
        error = validationMetadata.validate(valueToValidate);
      } catch (e) {
        error = (e as Exception).formattedMessage;
      }

      final isError = error != null;
      if (isError && stopWhenFirstError) {
        final validationError = ValidationError(
          fieldName: validationMetadata.fieldName ??
              validationData.instanceMemberSymbol,
          originalValue: valueToValidate,
          errorMessage: validationMetadata.errorMessage,
        );
        return ValidationResult(
          errors: [
            validationError,
          ],
          validationData: validationDatas,
        );
      }
      if (isError) {
        final validationError = ValidationError(
          fieldName: validationMetadata.fieldName ??
              validationData.instanceMemberSymbol,
          originalValue: valueToValidate,
          errorMessage: validationMetadata.errorMessage,
        );
        validationErrors.add(
          validationError,
        );
      }
    }
  }
  return ValidationResult(
    errors: validationErrors,
    validationData: validationDatas,
  );
}