#jjs -fx xmlviewer.js [-- <url-of-xml-doc>]

/*

 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * 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,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

if (! $OPTIONS._fx) {

    print("Usage: jjs -fx xmlviewer.js [-- <url-of-xml-doc>]");

    exit(1);

}

// Using JavaFX from Nashorn. See also:

// http://docs.oracle.com/javase/8/docs/technotes/guides/scripting/nashorn/javafx.html

// Simple sample to view a XML document as a JavaFX tree.

// JavaFX classes used

var StackPane = Java.type("javafx.scene.layout.StackPane");

var Scene     = Java.type("javafx.scene.Scene");

var TreeItem  = Java.type("javafx.scene.control.TreeItem");

var TreeView  = Java.type("javafx.scene.control.TreeView");

// XML DocumentBuilderFactory

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

var Attr = Java.type("org.w3c.dom.Attr");

var Element = Java.type("org.w3c.dom.Element");

var Text = Java.type("org.w3c.dom.Text");

// parse XML from uri and return Document

function parseXML(uri) {

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

    docBuilder.validating = false;

    return docBuilder["parse(java.lang.String)"](uri);

}

// Create a javafx TreeItem to view a XML element

function treeItemForObject(element, name) {

    var item = new TreeItem(name);

    item.expanded = true;

    var attrs = element.attributes;

    var numAttrs = attrs.length;

    for (var a = 0; a < numAttrs; a++) {

        var attr = attrs.item(a);

        var subitem = new TreeItem(attr.name + " = " + attr.value);

        item.children.add(subitem);

    }

    var childNodes = element.childNodes;

    var numNodes = childNodes.length;

    for (var n = 0; n < numNodes; n++) {

       var node = childNodes.item(n);

       if (node instanceof Element) {

           var subitem = treeItemForObject(node, node.tagName);

           item.children.add(subitem);

       }

    }

    return item;

}

// Ofcourse, the best default URL is cricket score :) 

var DEFAULT_URL = "http://synd.cricbuzz.com/j2me/1.0/livematches.xml";

var url = arguments.length == 0? DEFAULT_URL : arguments[0];

var element = parseXML(url).getDocumentElement();

// JavaFX start method

function start(stage) {

    stage.title = "XML Viewer: " + url;

    var rootItem = treeItemForObject(element, element.tagName);

    var tree = new TreeView(rootItem);

    var root = new StackPane();

    root.children.add(tree);

    stage.scene = new Scene(root, 300, 450);

    stage.show();

}