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