1 #// Usage: jjs -cp dom_linker.jar -scripting dom_linker_gutenberg.js 2 3 /* 4 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * - Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * - Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * - Neither the name of Oracle nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 22 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 23 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 25 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 28 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 // This script depends on DOM Element dynalink linker! 35 // Without that linker, this script will fail to run! 36 37 // Simple example that demonstrates reading XML Rss feed 38 // to generate a HTML file from script and show it by browser. 39 // Uses XML DOM parser along with DOM element pluggable dynalink linker 40 // for ease of navigation of DOM (child) elements by name. 41 42 // Java classes used 43 var DocBuilderFac = Java.type("javax.xml.parsers.DocumentBuilderFactory"); 44 var Node = Java.type("org.w3c.dom.Node"); 45 var File = Java.type("java.io.File"); 46 var FileWriter = Java.type("java.io.FileWriter"); 47 var PrintWriter = Java.type("java.io.PrintWriter"); 48 49 // parse XML from uri and return Document 50 function parseXML(uri) { 51 var docBuilder = DocBuilderFac.newInstance().newDocumentBuilder(); 52 return docBuilder["parse(java.lang.String)"](uri); 53 } 54 55 // generate HTML using here-doc and string interpolation 56 function getBooksHtml() { 57 var doc = parseXML("http://www.gutenberg.org/cache/epub/feeds/today.rss"); 58 // wrap document root Element as script convenient object 59 var rss = doc.documentElement; 60 61 var str = <<HEAD 62 63 <html> 64 <title>${rss._channel._title._}</title> 65 <body> 66 <h1>${rss._channel._description._}</h1> 67 <p> 68 Published on ${rss._channel._pubDate._} 69 </p> 70 71 HEAD 72 73 var items = rss._channel._item; 74 for each (var i in items) { 75 str += <<LIST 76 77 <dl> 78 <dt><a href="${i._link._}">${i._title._}</a></dt> 79 <dd>${i._description._}</dd> 80 </dl> 81 82 LIST 83 } 84 str += <<END 85 86 </body> 87 </html> 88 89 END 90 return str; 91 } 92 93 // write the string to the given file 94 function writeTo(file, str) { 95 var w = new PrintWriter(new FileWriter(file)); 96 try { 97 w.print(str); 98 } finally { 99 w.close(); 100 } 101 } 102 103 // generate books HTML 104 var str = getBooksHtml(); 105 106 // write to file. __DIR__ is directory where 107 // this script is stored. 108 var file = new File(__DIR__ + "books.html"); 109 writeTo(file, str); 110 111 // show it by desktop browser 112 try { 113 var Desktop = Java.type("java.awt.Desktop"); 114 Desktop.desktop.browse(file.toURI()); 115 } catch (e) { 116 print(e); 117 }