diff -r 5e3d8947e95c -r c6e9453ed5ef samples/javaconstructorbind.js --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/samples/javaconstructorbind.js Wed Jul 29 18:54:56 2015 +0530 @@ -0,0 +1,69 @@ +/* + * Copyright (c) 2015, 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 + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +// bind on a Java constructor + +// See Function.prototype.bind: +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind +var bind = Function.prototype.bind; + +var URL = Java.type("java.net.URL"); + +// get the constructor that accepts URL, String parameters. +// constructor signatures are properties of type object. +var newURL = URL["(URL, String)"]; + +// bind "context" URL parameter. +var TwitterURL = bind.call(newURL, null, new URL('https://www.twitter.com')); + +// now you can create context relative URLs using the bound constructor +print(new TwitterURL("sundararajan_a")); + +// read the URL content and print (optional part) + +var BufferedReader = Java.type("java.io.BufferedReader"); +var InputStreamReader = Java.type("java.io.InputStreamReader"); + +// function to retrieve text content of the given URL +function readTextFromURL(url) { + var str = ''; + var u = new URL(url); + var reader = new BufferedReader( + new InputStreamReader(u.openStream())); + try { + reader.lines().forEach(function(x) str += x); + return str; + } finally { + reader.close(); + } +} + +print(readTextFromURL(new TwitterURL("sundararajan_a")));