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