1 /*
   2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  *   - Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  *
  11  *   - Redistributions in binary form must reproduce the above copyright
  12  *     notice, this list of conditions and the following disclaimer in the
  13  *     documentation and/or other materials provided with the distribution.
  14  *
  15  *   - Neither the name of Oracle nor the names of its
  16  *     contributors may be used to endorse or promote products derived
  17  *     from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  20  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  21  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  26  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  27  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  28  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  29  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31 
  32 /*
  33  * This sample demonstrates the use of es6 tagged template literal to
  34  * create a java object. A XML DOM Document object is created from
  35  * String using es6 tagged template literal.
  36  *
  37  * Usage:
  38  *    jjs --language=es6 dom_tagged_literal.js
  39  */
  40 
  41 // Java types used
  42 const BAIS = Java.type("java.io.ByteArrayInputStream")
  43 const DocBuilderFac = Java.type("javax.xml.parsers.DocumentBuilderFactory")
  44 const DOMSource = Java.type("javax.xml.transform.dom.DOMSource")
  45 const StreamResult = Java.type("javax.xml.transform.stream.StreamResult")
  46 const StringWriter = Java.type("java.io.StringWriter")
  47 const TransformerFactory = Java.type("javax.xml.transform.TransformerFactory")
  48 
  49 function DOM(str) {
  50     var docBuilder = DocBuilderFac.newInstance().newDocumentBuilder()
  51     docBuilder.validating = false
  52     return docBuilder["parse(java.io.InputStream)"](new BAIS(String(str).bytes))
  53 }
  54 
  55 // es6 tagged template literal to create DOM from
  56 // multi-line XML string
  57 
  58 const dom = DOM`
  59 <foo>
  60   <bar title="hello">world</bar>
  61 </foo>`
  62 
  63 // access DOM elements
  64 const foo = dom.documentElement
  65 print(foo.tagName)
  66 const bar = foo.getElementsByTagName("bar").item(0)
  67 print(bar.tagName)
  68 print(bar.getAttribute("title"))
  69 
  70 // modify DOM
  71 foo.setAttribute("name", "nashorn")
  72 foo.appendChild(dom.createElement("test"))
  73 
  74 // serialize DOM to XML string
  75 function domToXML(d) {
  76     const transformer = TransformerFactory.newInstance().newTransformer()
  77     const res = new StreamResult(new StringWriter())
  78     transformer.transform(new DOMSource(d), res)
  79     return res.writer.toString()
  80 }
  81 
  82 // serialize DOM to a String & print
  83 print(domToXML(dom))