aoqi@0: #// usage: jjs -scripting 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: // Simple nashorn example showing back-quote exec process,
aoqi@0: // JSON and Java8 streams
aoqi@0: 
aoqi@0: var Arrays = Java.type("java.util.Arrays");
aoqi@0: 
aoqi@0: // use curl to download JSON weather data from the net
aoqi@0: // use backquote -scripting mode syntax to exec a process
aoqi@0: 
aoqi@0: `curl http://api.openweathermap.org/data/2.5/forecast/daily?q=Chennai&mode=json&units=metric&cnt=7`;
aoqi@0: 
aoqi@0: // parse JSON
aoqi@0: var weather = JSON.parse($OUT);
aoqi@0: 
aoqi@0: // pull out humidity as array
aoqi@0: var humidity = weather.list.map(function(curVal) {
aoqi@0:     return curVal.humidity;
aoqi@0: })
aoqi@0: 
aoqi@0: // Stream API to print stat
aoqi@0: print("Humidity");
aoqi@0: print(Arrays["stream(int[])"](humidity).summaryStatistics());
aoqi@0: 
aoqi@0: // pull maximum day time temperature
aoqi@0: var temp = weather.list.map(function(curVal) {
aoqi@0:     return curVal.temp.max;
aoqi@0: });
aoqi@0: 
aoqi@0: // Stream API to print stat
aoqi@0: print("Max Temperature");
aoqi@0: print(Arrays["stream(double[])"](temp).summaryStatistics());