1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/samples/javaconstructorbind.js Wed Jul 29 18:54:56 2015 +0530
1.3 @@ -0,0 +1,69 @@
1.4 +/*
1.5 + * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
1.6 + *
1.7 + * Redistribution and use in source and binary forms, with or without
1.8 + * modification, are permitted provided that the following conditions
1.9 + * are met:
1.10 + *
1.11 + * - Redistributions of source code must retain the above copyright
1.12 + * notice, this list of conditions and the following disclaimer.
1.13 + *
1.14 + * - Redistributions in binary form must reproduce the above copyright
1.15 + * notice, this list of conditions and the following disclaimer in the
1.16 + * documentation and/or other materials provided with the distribution.
1.17 + *
1.18 + * - Neither the name of Oracle nor the names of its
1.19 + * contributors may be used to endorse or promote products derived
1.20 + * from this software without specific prior written permission.
1.21 + *
1.22 + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
1.23 + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
1.24 + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1.25 + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
1.26 + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
1.27 + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
1.28 + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
1.29 + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
1.30 + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
1.31 + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
1.32 + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.33 + */
1.34 +
1.35 +// bind on a Java constructor
1.36 +
1.37 +// See Function.prototype.bind:
1.38 +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind
1.39 +var bind = Function.prototype.bind;
1.40 +
1.41 +var URL = Java.type("java.net.URL");
1.42 +
1.43 +// get the constructor that accepts URL, String parameters.
1.44 +// constructor signatures are properties of type object.
1.45 +var newURL = URL["(URL, String)"];
1.46 +
1.47 +// bind "context" URL parameter.
1.48 +var TwitterURL = bind.call(newURL, null, new URL('https://www.twitter.com'));
1.49 +
1.50 +// now you can create context relative URLs using the bound constructor
1.51 +print(new TwitterURL("sundararajan_a"));
1.52 +
1.53 +// read the URL content and print (optional part)
1.54 +
1.55 +var BufferedReader = Java.type("java.io.BufferedReader");
1.56 +var InputStreamReader = Java.type("java.io.InputStreamReader");
1.57 +
1.58 +// function to retrieve text content of the given URL
1.59 +function readTextFromURL(url) {
1.60 + var str = '';
1.61 + var u = new URL(url);
1.62 + var reader = new BufferedReader(
1.63 + new InputStreamReader(u.openStream()));
1.64 + try {
1.65 + reader.lines().forEach(function(x) str += x);
1.66 + return str;
1.67 + } finally {
1.68 + reader.close();
1.69 + }
1.70 +}
1.71 +
1.72 +print(readTextFromURL(new TwitterURL("sundararajan_a")));
