private boolean isDetectedFileContentTypeEqualsToInputContentType()

in digital-document-service/src/main/java/com/epam/digital/data/platform/dgtldcmnt/validator/AllowedUploadedDocumentValidator.java [100:142]

41 lines of code
6 McCabe index (conditional complexity)


  private boolean isDetectedFileContentTypeEqualsToInputContentType(
      UploadDocumentDto uploadDocumentDto, ConstraintValidatorContext context) {
    log.debug("Validating file content type for process-instance '{}'",
        uploadDocumentDto.getRootProcessInstanceId());
    final var filename = uploadDocumentDto.getFilename();
    final var inputFile = uploadDocumentDto.getFileInputStream();
    final String fileContentType;
    try {
      fileContentType = tika.detect(inputFile, filename);
    } catch (IOException e) {
      context.buildConstraintViolationWithTemplate(
              "Couldn't read the file to detect file content type")
          .addPropertyNode("fileInputStream")
          .addConstraintViolation()
          .disableDefaultConstraintViolation();
      return false;
    }

    final var inputContentType = uploadDocumentDto.getContentType();
    final var isDetectedContentTypeEqualsToInputContentType = fileContentType.equals(
        inputContentType);
    final var isDetectedContentTypeCorrespondsToInputContentType =
        DocumentConstants.CORRESPONDED_MEDIA_TYPES
            .getOrDefault(inputContentType, Set.of())
            .contains(fileContentType);
    final var shouldPassSignatureType = !signedFileDetectionEnabled && fileContentType.equals(
        DocumentConstants.SIGNATURE_TYPE);

    final var isValid = isDetectedContentTypeEqualsToInputContentType
        || isDetectedContentTypeCorrespondsToInputContentType
        || shouldPassSignatureType;
    if (!isValid) {
      context.buildConstraintViolationWithTemplate(
              "Detected file content type doesn't match input content type")
          .addPropertyNode("fileInputStream")
          .addConstraintViolation()
          .disableDefaultConstraintViolation();
    }
    log.debug("Detected file content type '{}' corresponds to input content-type '{}' - '{}'."
            + "Content type detection for singed files enabled - '{}'",
        fileContentType, inputContentType, isValid, signedFileDetectionEnabled);
    return isValid;
  }