/*

 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.

 *

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 * modification, are permitted provided that the following conditions

 * are met:

 *

 *   - Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer.

 *

 *   - Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution.

 *

 *   - Neither the name of Oracle nor the names of its

 *     contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS

 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

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 */

/*

 * This sample demonstrates the use of es6 tagged template literal to

 * create a java object. A XML DOM Document object is created from

 * String using es6 tagged template literal.

 *

 * Usage:

 *    jjs --language=es6 dom_tagged_literal.js

 */

// Java types used

const BAIS = Java.type("java.io.ByteArrayInputStream")

const DocBuilderFac = Java.type("javax.xml.parsers.DocumentBuilderFactory")

const DOMSource = Java.type("javax.xml.transform.dom.DOMSource")

const StreamResult = Java.type("javax.xml.transform.stream.StreamResult")

const StringWriter = Java.type("java.io.StringWriter")

const TransformerFactory = Java.type("javax.xml.transform.TransformerFactory")

function DOM(str) {

    var docBuilder = DocBuilderFac.newInstance().newDocumentBuilder()

    docBuilder.validating = false

    return docBuilder["parse(java.io.InputStream)"](new BAIS(String(str).bytes))

}

// es6 tagged template literal to create DOM from

// multi-line XML string

const dom = DOM`

<foo>

  <bar title="hello">world</bar>

</foo>`

// access DOM elements

const foo = dom.documentElement

print(foo.tagName)

const bar = foo.getElementsByTagName("bar").item(0)

print(bar.tagName)

print(bar.getAttribute("title"))

// modify DOM

foo.setAttribute("name", "nashorn")

foo.appendChild(dom.createElement("test"))

// serialize DOM to XML string

function domToXML(d) {

    const transformer = TransformerFactory.newInstance().newTransformer()

    const res = new StreamResult(new StringWriter())

    transformer.transform(new DOMSource(d), res)

    return res.writer.toString()

}

// serialize DOM to a String & print

print(domToXML(dom))