protected SignableRequest toSignableRequest()

in src/main/java/com/amazonaws/neptune/auth/NeptuneRequestMetadataSigV4Signer.java [72:115]
33 lines of code
2 McCabe index (conditional complexity)

    protected SignableRequest<?> toSignableRequest(final RequestMetadata request)
            throws NeptuneSigV4SignerException {

        // make sure the request is not null and contains the minimal required set of information
        checkNotNull(request, "The request must not be null");
        checkNotNull(request.getFullUri(), "The request URI must not be null");
        checkNotNull(request.getMethod(), "The request method must not be null");

        final URI fullUri = URI.create(request.getFullUri());
        checkNotNull(fullUri.getAuthority(), "Authority must not be null");
        checkNotNull(fullUri.getScheme(), "Scheme must not be null");

        // convert the headers to the internal API format
        final Map<String, String> headersInternal = request.getHeaders()
                .entrySet()
                .stream()
                .filter(e -> !e.getKey().equalsIgnoreCase(HOST))
                .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));

        // convert the parameters to the internal API format
        final String queryStr = fullUri.getRawQuery();
        final Map<String, List<String>> parametersInternal = extractParametersFromQueryString(queryStr);

        // carry over the entity (or an empty entity, if no entity is provided)
        final InputStream content;

        final byte[] bytes;
        if (request.getContent().isPresent()) {
            bytes = request.getContent().get();
        } else {
            bytes = "".getBytes(StandardCharsets.UTF_8);
        }
        content = new ByteArrayInputStream(bytes);

        final URI endpointUri = URI.create(fullUri.getScheme() + "://" + fullUri.getAuthority());
        final String resourcePath = fullUri.getPath();
        return convertToSignableRequest(
                request.getMethod(),
                endpointUri,
                resourcePath,
                headersInternal,
                parametersInternal,
                content);
    }