141 lines
4.8 KiB
JavaScript
141 lines
4.8 KiB
JavaScript
#// Usage: jjs -scripting cricket.js
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/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of Oracle nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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// Example that demonstrates reading XML Rss feed.
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// XML DOM Document element is wrapped by script
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// "proxy" (JSAdapter constructor)
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// Java classes used
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var DocBuilderFac = Java.type("javax.xml.parsers.DocumentBuilderFactory");
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var Node = Java.type("org.w3c.dom.Node");
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// constants from Node class
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var ELEMENT_NODE = Node.ELEMENT_NODE;
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var TEXT_NODE = Node.TEXT_NODE;
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// parse XML from uri and return Document
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function parseXML(uri) {
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var docBuilder = DocBuilderFac.newInstance().newDocumentBuilder();
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return docBuilder["parse(java.lang.String)"](uri);
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}
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// get child Elements of given name of the parent element given
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function getChildElements(elem, name) {
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var nodeList = elem.childNodes;
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var childElems = [];
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var len = nodeList.length;
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for (var i = 0; i < len; i++) {
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var node = nodeList.item(i);
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if (node.nodeType == ELEMENT_NODE &&
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node.tagName == name) {
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childElems.push(wrapElement(node));
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}
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}
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return childElems;
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}
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// get concatenated child text content of an Element
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function getElemText(elem) {
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var nodeList = elem.childNodes;
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var len = nodeList.length;
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var text = '';
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for (var i = 0; i < len; i++) {
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var node = nodeList.item(i);
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if (node.nodeType == TEXT_NODE) {
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text += node.nodeValue;
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}
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}
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return text;
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}
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// Wrap DOM Element object as a convenient script object
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// using JSAdapter. JSAdapter is like java.lang.reflect.Proxy
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// in that it allows property access, method calls be trapped
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// by 'magic' methods like __get__, __call__.
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function wrapElement(elem) {
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if (! elem) {
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return elem;
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}
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return new JSAdapter() {
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// getter to expose child elements and attributes by name
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__get__: function(name) {
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if (typeof name == 'string') {
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if (name.startsWith('@')) {
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var attr = elem.getAttributeNode(name.substring(1));
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return !attr? undefined : attr.value;
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}
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var arr = getChildElements(elem, name);
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if (arr.length == 1) {
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// single child element, expose as single element
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return arr[0];
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} else {
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// multiple children of given name, expose as array
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return arr;
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}
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}
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return undefined;
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},
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__call__: function(name) {
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// toString override to get text content of this Element
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if (name == 'toString' || name == 'valueOf') {
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return getElemText(elem);
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}
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return undefined;
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}
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}
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}
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function printCricketScore() {
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var doc = parseXML("http://static.cricinfo.com/rss/livescores.xml");
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// wrap document root Element as script convenient object
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var rss = wrapElement(doc.documentElement);
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print("rss file version " + rss['@version']);
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print(rss.channel.title);
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print(rss.channel.description);
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print(rss.channel.pubDate);
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print("=====================");
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var items = rss.channel.item;
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for each (var i in items) {
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print(i.description);
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}
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}
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printCricketScore();
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