Mercurial > jdk8-mips64-public > nashorn / file comparison
comparison: samples/javaconstructorbind.js
samples/javaconstructorbind.js
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| 1 /* | |
| 2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * | |
| 8 * - Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * | |
| 11 * - Redistributions in binary form must reproduce the above copyright | |
| 12 * notice, this list of conditions and the following disclaimer in the | |
| 13 * documentation and/or other materials provided with the distribution. | |
| 14 * | |
| 15 * - Neither the name of Oracle nor the names of its | |
| 16 * contributors may be used to endorse or promote products derived | |
| 17 * from this software without specific prior written permission. | |
| 18 * | |
| 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS | |
| 20 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, | |
| 21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | |
| 23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
| 27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
| 28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| 29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 30 */ | |
| 31 | |
| 32 // bind on a Java constructor | |
| 33 | |
| 34 // See Function.prototype.bind: | |
| 35 // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind | |
| 36 var bind = Function.prototype.bind; | |
| 37 | |
| 38 var URL = Java.type("java.net.URL"); | |
| 39 | |
| 40 // get the constructor that accepts URL, String parameters. | |
| 41 // constructor signatures are properties of type object. | |
| 42 var newURL = URL["(URL, String)"]; | |
| 43 | |
| 44 // bind "context" URL parameter. | |
| 45 var TwitterURL = bind.call(newURL, null, new URL('https://www.twitter.com')); | |
| 46 | |
| 47 // now you can create context relative URLs using the bound constructor | |
| 48 print(new TwitterURL("sundararajan_a")); | |
| 49 | |
| 50 // read the URL content and print (optional part) | |
| 51 | |
| 52 var BufferedReader = Java.type("java.io.BufferedReader"); | |
| 53 var InputStreamReader = Java.type("java.io.InputStreamReader"); | |
| 54 | |
| 55 // function to retrieve text content of the given URL | |
| 56 function readTextFromURL(url) { | |
| 57 var str = ''; | |
| 58 var u = new URL(url); | |
| 59 var reader = new BufferedReader( | |
| 60 new InputStreamReader(u.openStream())); | |
| 61 try { | |
| 62 reader.lines().forEach(function(x) str += x); | |
| 63 return str; | |
| 64 } finally { | |
| 65 reader.close(); | |
| 66 } | |
| 67 } | |
| 68 | |
| 69 print(readTextFromURL(new TwitterURL("sundararajan_a"))); |
