iTextSharp.text.factories.ElementFactory.GetAnnotation C# (CSharp) Метод

        public static Annotation GetAnnotation(Properties attributes) {
            float llx = 0, lly = 0, urx = 0, ury = 0;
            String value;
            
            value = attributes[ElementTags.LLX];
            if (value != null) {
                llx = float.Parse(value, System.Globalization.NumberFormatInfo.InvariantInfo);
            }
            value = attributes[ElementTags.LLY];
            if (value != null) {
                lly = float.Parse(value, System.Globalization.NumberFormatInfo.InvariantInfo);
            }
            value = attributes[ElementTags.URX];
            if (value != null) {
                urx = float.Parse(value, System.Globalization.NumberFormatInfo.InvariantInfo);
            }
            value = attributes[ElementTags.URY];
            if (value != null) {
                ury = float.Parse(value, System.Globalization.NumberFormatInfo.InvariantInfo);
            }
            
            String title = attributes[ElementTags.TITLE];
            String text = attributes[ElementTags.CONTENT];
            if (title != null || text != null) {
                return new Annotation(title, text, llx, lly, urx, ury);
            }
            value = attributes[ElementTags.URL];
            if (value != null) {
                return new Annotation(llx, lly, urx, ury, value);
            }
            value = attributes[ElementTags.NAMED];
            if (value != null) {
                return new Annotation(llx, lly, urx, ury, int.Parse(value));
            }
            String file = attributes[ElementTags.FILE];
            String destination = attributes[ElementTags.DESTINATION];
            String page = (String) attributes.Remove(ElementTags.PAGE);
            if (file != null) {
                if (destination != null) {
                    return new Annotation(llx, lly, urx, ury, file, destination);
                }
                if (page != null) {
                    return new Annotation(llx, lly, urx, ury, file, int.Parse(page));
                }
            }
            if (title == null)
                title = "";
            if (text == null)
                text = "";
            return new Annotation(title, text, llx, lly, urx, ury);
        }
    }