121 lines
4.1 KiB
JavaScript
121 lines
4.1 KiB
JavaScript
#// Usage: jjs -fx jsonviewer.js
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// or
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// jjs -fx jsonviewer.js -- <url-of-json-doc>
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/*
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* Copyright (c) 2014, 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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if (! $OPTIONS._fx) {
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print("Usage: jjs -fx jsonviewer.js -- <url-of-json-doc>");
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exit(1);
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}
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// This example downloads a JSON file from a URL and
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// shows the same as a JavaFX tree view.
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// Using JavaFX from Nashorn. See also:
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// http://docs.oracle.com/javase/8/docs/technotes/guides/scripting/nashorn/javafx.html
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// JavaFX classes used
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var StackPane = Java.type("javafx.scene.layout.StackPane");
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var Scene = Java.type("javafx.scene.Scene");
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var TreeItem = Java.type("javafx.scene.control.TreeItem");
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var TreeView = Java.type("javafx.scene.control.TreeView");
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// read text content of a URL
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function readTextFromURL(url) {
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// equivalent to
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//
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// import java.io.*;
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// import java.net.*;
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// import java.lang.StringBuffer;
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//
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// only inside the 'with' statement
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with (new JavaImporter(java.io,
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java.net,
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java.lang.StringBuilder)) {
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var buf = new StringBuilder();
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var u = new URL(url);
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var reader = new BufferedReader(
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new InputStreamReader(u.openStream()));
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var line = null;
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try {
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while ((line = reader.readLine()) != null)
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buf.append(line).append('\n');
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} finally {
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reader.close();
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}
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return buf.toString();
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}
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}
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// Create a javafx TreeItem to view a script object
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function treeItemForObject(obj, name) {
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var item = new TreeItem(name);
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for (var prop in obj) {
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var node = obj[prop];
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if (typeof node == 'object') {
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if (node == null) {
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// skip nulls
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continue;
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}
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if (Array.isArray(node) && node.length == 0) {
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// skip empty arrays
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continue;
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}
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var subitem = treeItemForObject(node, prop);
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} else {
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var subitem = new TreeItem(prop + ": " + node);
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}
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item.children.add(subitem);
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}
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return item;
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}
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var DEFAULT_URL = "http://api.openweathermap.org/data/2.5/forecast/daily?q=Chennai&mode=json&units=metric&cnt=7`";
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var url = arguments.length == 0? DEFAULT_URL : arguments[0];
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var obj = JSON.parse(readTextFromURL(url));
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// JavaFX start method
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function start(stage) {
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stage.title = "JSON Viewer";
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var rootItem = treeItemForObject(obj, url);
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var tree = new TreeView(rootItem);
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var root = new StackPane();
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root.children.add(tree);
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stage.scene = new Scene(root, 300, 450);
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stage.show();
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}
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