Wed, 07 Oct 2015 10:01:40 -0700
Merge
1 #// usage: jjs -scripting weather.js
3 /*
4 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * - Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * - Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * - Neither the name of Oracle nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
22 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
23 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
25 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
28 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
34 // Simple nashorn example showing back-quote exec process,
35 // JSON and Java8 streams
37 var Arrays = Java.type("java.util.Arrays");
39 // use curl to download JSON weather data from the net
40 // use backquote -scripting mode syntax to exec a process
42 `curl http://api.openweathermap.org/data/2.5/forecast/daily?q=Chennai&mode=json&units=metric&cnt=7`;
44 // parse JSON
45 var weather = JSON.parse($OUT);
47 // pull out humidity as array
48 var humidity = weather.list.map(function(curVal) {
49 return curVal.humidity;
50 })
52 // Stream API to print stat
53 print("Humidity");
54 print(Arrays["stream(int[])"](humidity).summaryStatistics());
56 // pull maximum day time temperature
57 var temp = weather.list.map(function(curVal) {
58 return curVal.temp.max;
59 });
61 // Stream API to print stat
62 print("Max Temperature");
63 print(Arrays["stream(double[])"](temp).summaryStatistics());