static List translateToSdkDocumentMetadataConfigurationList()

in aws-kendra-index/src/main/java/software/amazon/kendra/index/Translator.java [216:264]
38 lines of code
9 McCabe index (conditional complexity)

  static List<DocumentMetadataConfiguration> translateToSdkDocumentMetadataConfigurationList(
          List<software.amazon.kendra.index.DocumentMetadataConfiguration> curr,
          List<software.amazon.kendra.index.DocumentMetadataConfiguration> prev) throws TranslatorValidationException {

    Map<String, String> previousMetadataNames = new HashMap<>();
    if (prev != null && !prev.isEmpty()) {
      previousMetadataNames = prev.stream().collect(Collectors.toMap(x -> x.getName(), x -> x.getType()));
    }
    Set<String> currMetadataNames = new HashSet<>();
    if (curr != null && !curr.isEmpty()) {
      currMetadataNames = curr.stream().map(x -> x.getName()).collect(Collectors.toSet());
    }
    List<DocumentMetadataConfiguration> sdkDefaultAttributes = new ArrayList<>();
    for (Map.Entry<String, String> entry : previousMetadataNames.entrySet()) {
      // If the attribute is a reserved one (i.e. it is prefixed with "_") ...
      if (entry.getKey().startsWith("_")) {
        // and it's not in the requested CloudFormation template,
        // then provide the default value. This allows customers to add and remove
        // reserved attributes. When removed, we set/reset the attribute to it's default
        if (!currMetadataNames.contains(entry.getKey())) {
          sdkDefaultAttributes.add(
                  DocumentMetadataConfiguration
                          .builder()
                          .name(entry.getKey())
                          .type(entry.getValue())
                          .search((Search) null)
                          .relevance((Relevance) null)
                          .build());
        }
      } else {
        // otherwise it's a custom field. We don't allow customers to remove
        // custom fields from their CloudFormation template so check for that here.
        if (!currMetadataNames.contains(entry.getKey())) {
          throw new TranslatorValidationException(
                  String.format("Custom attribute %s cannot be removed", entry.getKey()));
        }
      }
    }

    // Document metadata configuration directly defined/requested in the CloudFormation template
    List<DocumentMetadataConfiguration> sdkAttributesDefinedInCFTemplate =
            translateToSdkDocumentMetadataConfigurationList(curr);

    return Stream.concat(
            sdkAttributesDefinedInCFTemplate.stream(),
            sdkDefaultAttributes.stream())
            .collect(Collectors.toList());

  }