private static void scanForIgnoredEncryptionTags()

in DynamoDbEncryption/runtimes/java/src/main/java/software/amazon/cryptography/dbencryptionsdk/dynamodb/enhancedclient/DynamoDbEnhancedClientEncryption.java [444:515]
72 lines of code
8 McCabe index (conditional complexity)

  private static void scanForIgnoredEncryptionTags(
    final TableSchema<?> tableSchema,
    final String attributeName,
    final StringBuilder path
  ) {
    AttributeConverter<?> attributeConverter =
      tableSchema.converterForAttribute(attributeName);
    StringBuilder attributePath = new StringBuilder(path)
      .append(attributeName)
      .append(".");
    if (
      Objects.nonNull(attributeConverter) &&
      Objects.nonNull(attributeConverter.type()) &&
      attributeConverter.type().tableSchema().isPresent()
    ) {
      TableSchema<?> subTableSchema = attributeConverter
        .type()
        .tableSchema()
        .get();
      Set<String> signOnlyAttributes = getSignOnlyAttributes(subTableSchema);
      if (signOnlyAttributes.size() > 0) {
        throw DynamoDbEncryptionException
          .builder()
          .message(
            String.format(
              "Detected DynamoDbEncryption Tag %s on a nested attribute with Path %s. " +
              "This is NOT Supported at this time!",
              CUSTOM_DDB_ENCRYPTION_SIGN_ONLY_PREFIX,
              attributePath.append(signOnlyAttributes.toArray()[0])
            )
          )
          .build();
      }
      Set<String> signAndIncludeAttributes =
        getSignAndIncludeInEncryptionContextAttributes(subTableSchema);
      if (signAndIncludeAttributes.size() > 0) {
        throw DynamoDbEncryptionException
          .builder()
          .message(
            String.format(
              "Detected DynamoDbEncryption Tag %s on a nested attribute with Path %s. " +
              "This is NOT Supported at this time!",
              CUSTOM_DDB_ENCRYPTION_SIGN_AND_INCLUDE_PREFIX,
              attributePath.append(signAndIncludeAttributes.toArray()[0])
            )
          )
          .build();
      }
      Set<String> doNothingAttributes = getDoNothingAttributes(subTableSchema);
      if (doNothingAttributes.size() > 0) {
        throw DynamoDbEncryptionException
          .builder()
          .message(
            String.format(
              "Detected DynamoDbEncryption Tag %s on a nested attribute with Path %s. " +
              "This is NOT Supported at this time!",
              CUSTOM_DDB_ENCRYPTION_DO_NOTHING_PREFIX,
              attributePath.append(doNothingAttributes.toArray()[0])
            )
          )
          .build();
      }
      List<String> subAttributeNames = subTableSchema.attributeNames();
      for (String subAttributeName : subAttributeNames) {
        scanForIgnoredEncryptionTags(
          subTableSchema,
          subAttributeName,
          attributePath
        );
      }
    }
  }