| #// usage: jjs -scripting weather.js |
| |
| /* |
| * Copyright (c) 2014, 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 |
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| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| // Simple nashorn example showing back-quote exec process, |
| // JSON and Java8 streams |
| |
| var Arrays = Java.type("java.util.Arrays"); |
| |
| // use curl to download JSON weather data from the net |
| // use backquote -scripting mode syntax to exec a process |
| |
| `curl http://api.openweathermap.org/data/2.5/forecast/daily?q=Chennai&mode=json&units=metric&cnt=7`; |
| |
| // parse JSON |
| var weather = JSON.parse($OUT); |
| |
| // pull out humidity as array |
| var humidity = weather.list.map(function(curVal) { |
| return curVal.humidity; |
| }) |
| |
| // Stream API to print stat |
| print("Humidity"); |
| print(Arrays["stream(int[])"](humidity).summaryStatistics()); |
| |
| // pull maximum day time temperature |
| var temp = weather.list.map(function(curVal) { |
| return curVal.temp.max; |
| }); |
| |
| // Stream API to print stat |
| print("Max Temperature"); |
| print(Arrays["stream(double[])"](temp).summaryStatistics()); |