}

    @Override
    public ExtractData getText(final InputStream in, final Map<String, String> params) {
        validateInputStream(in);

        try {
            final JsonNode rootNode = objectMapper.readTree(in);
            final StringBuilder textBuilder = new StringBuilder();
            final Map<String, List<String>> metadataMap = new LinkedHashMap<>();

            extractContent(rootNode, "", textBuilder, metadataMap, 0);