1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/samples/jsonviewer.js Wed Apr 27 01:36:41 2016 +0800
1.3 @@ -0,0 +1,120 @@
1.4 +#// Usage: jjs -fx jsonviewer.js
1.5 +// or
1.6 +// jjs -fx jsonviewer.js -- <url-of-json-doc>
1.7 +
1.8 +/*
1.9 + * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
1.10 + *
1.11 + * Redistribution and use in source and binary forms, with or without
1.12 + * modification, are permitted provided that the following conditions
1.13 + * are met:
1.14 + *
1.15 + * - Redistributions of source code must retain the above copyright
1.16 + * notice, this list of conditions and the following disclaimer.
1.17 + *
1.18 + * - Redistributions in binary form must reproduce the above copyright
1.19 + * notice, this list of conditions and the following disclaimer in the
1.20 + * documentation and/or other materials provided with the distribution.
1.21 + *
1.22 + * - Neither the name of Oracle nor the names of its
1.23 + * contributors may be used to endorse or promote products derived
1.24 + * from this software without specific prior written permission.
1.25 + *
1.26 + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
1.27 + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
1.28 + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1.29 + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
1.30 + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
1.31 + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
1.32 + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
1.33 + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
1.34 + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
1.35 + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
1.36 + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.37 + */
1.38 +
1.39 +if (! $OPTIONS._fx) {
1.40 + print("Usage: jjs -fx jsonviewer.js -- <url-of-json-doc>");
1.41 + exit(1);
1.42 +}
1.43 +
1.44 +// This example downloads a JSON file from a URL and
1.45 +// shows the same as a JavaFX tree view.
1.46 +
1.47 +// Using JavaFX from Nashorn. See also:
1.48 +// http://docs.oracle.com/javase/8/docs/technotes/guides/scripting/nashorn/javafx.html
1.49 +
1.50 +// JavaFX classes used
1.51 +var StackPane = Java.type("javafx.scene.layout.StackPane");
1.52 +var Scene = Java.type("javafx.scene.Scene");
1.53 +var TreeItem = Java.type("javafx.scene.control.TreeItem");
1.54 +var TreeView = Java.type("javafx.scene.control.TreeView");
1.55 +
1.56 +// read text content of a URL
1.57 +function readTextFromURL(url) {
1.58 + // equivalent to
1.59 + //
1.60 + // import java.io.*;
1.61 + // import java.net.*;
1.62 + // import java.lang.StringBuffer;
1.63 + //
1.64 + // only inside the 'with' statement
1.65 + with (new JavaImporter(java.io,
1.66 + java.net,
1.67 + java.lang.StringBuilder)) {
1.68 + var buf = new StringBuilder();
1.69 + var u = new URL(url);
1.70 + var reader = new BufferedReader(
1.71 + new InputStreamReader(u.openStream()));
1.72 + var line = null;
1.73 + try {
1.74 + while ((line = reader.readLine()) != null)
1.75 + buf.append(line).append('\n');
1.76 + } finally {
1.77 + reader.close();
1.78 + }
1.79 +
1.80 + return buf.toString();
1.81 + }
1.82 +}
1.83 +
1.84 +// Create a javafx TreeItem to view a script object
1.85 +function treeItemForObject(obj, name) {
1.86 + var item = new TreeItem(name);
1.87 + for (var prop in obj) {
1.88 + var node = obj[prop];
1.89 + if (typeof node == 'object') {
1.90 + if (node == null) {
1.91 + // skip nulls
1.92 + continue;
1.93 + }
1.94 +
1.95 + if (Array.isArray(node) && node.length == 0) {
1.96 + // skip empty arrays
1.97 + continue;
1.98 + }
1.99 +
1.100 + var subitem = treeItemForObject(node, prop);
1.101 + } else {
1.102 + var subitem = new TreeItem(prop + ": " + node);
1.103 + }
1.104 + item.children.add(subitem);
1.105 + }
1.106 + return item;
1.107 +}
1.108 +
1.109 +var DEFAULT_URL = "http://api.openweathermap.org/data/2.5/forecast/daily?q=Chennai&mode=json&units=metric&cnt=7`";
1.110 +
1.111 +var url = arguments.length == 0? DEFAULT_URL : arguments[0];
1.112 +var obj = JSON.parse(readTextFromURL(url));
1.113 +
1.114 +// JavaFX start method
1.115 +function start(stage) {
1.116 + stage.title = "JSON Viewer";
1.117 + var rootItem = treeItemForObject(obj, url);
1.118 + var tree = new TreeView(rootItem);
1.119 + var root = new StackPane();
1.120 + root.children.add(tree);
1.121 + stage.scene = new Scene(root, 300, 450);
1.122 + stage.show();
1.123 +}
