var xmlDocument : Document? = null
    val xPath: XPath = XPathFactory.newInstance().newXPath()

    constructor(xmlString: String){

        //println(xmlString)

        val builderFactory = DocumentBuilderFactory.newInstance()
        var builder: DocumentBuilder? = null
        try {
            builder = builderFactory.newDocumentBuilder()
        } catch (e: ParserConfigurationException) {
            e.printStackTrace()
        }

        try {
            xmlDocument = builder!!.parse(ByteArrayInputStream(xmlString.toByteArray()))
        } catch (e: SAXException) {
            e.printStackTrace()
        } catch (e: IOException) {
            e.printStackTrace()
        }

        ///println(xmlDocument)

    }

    fun getString(path: String): String? {

        return xPath.compile(path).evaluate(xmlDocument)

    }