if (info == null) {
            return;
        }

        for (final String key : info.getMetadataKeys()) {
            final String value = info.getCustomMetadataValue(key);
            addMetadata(extractData, key, value);
        }
    }

    protected void addMetadata(final ExtractData extractData, final String name, final String value) {
        if (value != null) {