aoqi@0: #// Usage: jjs -fx barchart_weather.js
aoqi@0: 
aoqi@0: /*
aoqi@0:  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
attila@962:  *
aoqi@0:  * Redistribution and use in source and binary forms, with or without
aoqi@0:  * modification, are permitted provided that the following conditions
aoqi@0:  * are met:
attila@962:  *
aoqi@0:  *   - Redistributions of source code must retain the above copyright
aoqi@0:  *     notice, this list of conditions and the following disclaimer.
attila@962:  *
aoqi@0:  *   - Redistributions in binary form must reproduce the above copyright
aoqi@0:  *     notice, this list of conditions and the following disclaimer in the
aoqi@0:  *     documentation and/or other materials provided with the distribution.
attila@962:  *
aoqi@0:  *   - Neither the name of Oracle nor the names of its
aoqi@0:  *     contributors may be used to endorse or promote products derived
aoqi@0:  *     from this software without specific prior written permission.
attila@962:  *
aoqi@0:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
aoqi@0:  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
aoqi@0:  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
aoqi@0:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
aoqi@0:  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
aoqi@0:  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
aoqi@0:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
aoqi@0:  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
aoqi@0:  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
aoqi@0:  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
aoqi@0:  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
aoqi@0:  */
aoqi@0: 
aoqi@0: // Example that retrieves weather data from a URL in JSON
aoqi@0: // format and draws bar chart using JavaFX
aoqi@0: 
aoqi@0: // -fx check
aoqi@0: if (! $OPTIONS._fx) {
aoqi@0:     print("Usage: jjs -fx barchart_weather.js");
aoqi@0:     exit(1);
aoqi@0: }
aoqi@0: 
aoqi@0: // Java classes used
aoqi@0: var URL = Java.type("java.net.URL");
aoqi@0: var BufferedReader = Java.type("java.io.BufferedReader");
aoqi@0: var InputStreamReader = Java.type("java.io.InputStreamReader");
aoqi@0: 
aoqi@0: // function to retrieve text content of the given URL
aoqi@0: function readTextFromURL(url) {
aoqi@0:     var str = '';
aoqi@0:     var u = new URL(url);
aoqi@0:     var reader = new BufferedReader(
aoqi@0:         new InputStreamReader(u.openStream()));
aoqi@0:     try {
aoqi@0:         reader.lines().forEach(function(x) str += x);
aoqi@0:         return str;
aoqi@0:     } finally {
aoqi@0:         reader.close();
aoqi@0:     }
aoqi@0: }
aoqi@0: 
aoqi@0: // change URL for your city here!
aoqi@0: var url = "http://api.openweathermap.org/data/2.5/forecast?q=chennai,india&units=metric&mode=json";
aoqi@0: 
aoqi@0: // download JSON document and parse
aoqi@0: var json = readTextFromURL(url);
aoqi@0: var weather = JSON.parse(json);
aoqi@0: 
aoqi@0: // View JSON of this using site such as http://www.jsoneditoronline.org/ to know
aoqi@0: // about the JSON data format used by this site
aoqi@0: 
aoqi@0: // Extracted data from the json object
aoqi@0: var temp = weather.list.map(function(x) x.main.temp);
aoqi@0: var temp_min = weather.list.map(function(x) x.main.temp_min);
aoqi@0: var temp_max = weather.list.map(function(x) x.main.temp_max);
aoqi@0: var date = weather.list.map(function(x) x.dt_txt);
aoqi@0: 
aoqi@0: // JavaFX classes used
aoqi@0: var Scene = Java.type("javafx.scene.Scene");
aoqi@0: var BarChart = Java.type("javafx.scene.chart.BarChart");
aoqi@0: var CategoryAxis = Java.type("javafx.scene.chart.CategoryAxis");
aoqi@0: var NumberAxis = Java.type("javafx.scene.chart.NumberAxis");
aoqi@0: var XYChart = Java.type("javafx.scene.chart.XYChart");
aoqi@0: 
aoqi@0: function start(stage) {
aoqi@0:     stage.title="Chennai Weather Bar Chart";
aoqi@0:     var xAxis = new CategoryAxis();
aoqi@0:     xAxis.label = "date/time";
aoqi@0:     var yAxis = new NumberAxis();
aoqi@0:     yAxis.label = "temp in C";
aoqi@0:     var bc = new BarChart(xAxis, yAxis);
aoqi@0: 
aoqi@0:     // 3 bars per datetime item - temp, min temp and max temp
aoqi@0:     var s1 = new XYChart.Series();
aoqi@0:     s1.name = "temp";
aoqi@0:     for (d in date) {
aoqi@0:         s1.data.add(new XYChart.Data(date[d], temp[d]));
aoqi@0:     }
aoqi@0: 
aoqi@0:     var s2 = new XYChart.Series();
aoqi@0:     s2.name = "min temp";
aoqi@0:     for (d in date) {
aoqi@0:         s2.data.add(new XYChart.Data(date[d], temp_min[d]));
aoqi@0:     }
aoqi@0: 
aoqi@0:     var s3 = new XYChart.Series();
aoqi@0:     s3.name = "max temp";
aoqi@0:     for (d in date) {
aoqi@0:         s3.data.add(new XYChart.Data(date[d], temp_max[d]));
aoqi@0:     }
aoqi@0: 
aoqi@0:     bc.data.addAll(s1, s2, s3);
aoqi@0: 
aoqi@0:     stage.scene = new Scene(bc, 800, 600);
aoqi@0:     stage.show();
aoqi@0: }