1#// Usage: jjs -scripting -cp . jsobject.js 2 3/* 4 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * - Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * - Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * - Neither the name of Oracle nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 22 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 23 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 25 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 28 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34// This sample demonstrats how to expose a 35// script friendly object from your java code 36// by implementing jdk.nashorn.api.scripting.JSObject 37 38// compile the java program 39`javac BufferArray.java`; 40 41// print error, if any and exit 42if ($ERR != '') { 43 print($ERR); 44 exit($EXIT); 45} 46 47// create BufferArray 48var BufferArray = Java.type("BufferArray"); 49var bb = new BufferArray(10); 50 51// 'magic' methods called to retrieve set/get 52// properties on BufferArray instance 53var len = bb.length; 54print("bb.length = " + len) 55for (var i = 0; i < len; i++) { 56 bb[i] = i*i; 57} 58 59for (var i = 0; i < len; i++) { 60 print(bb[i]); 61} 62 63// get underlying buffer by calling a method 64// on BufferArray magic object 65 66// 'buf' is a function member 67print(typeof bb.buf); 68var buf = bb.buf(); 69 70// use retrieved underlying nio buffer 71var cap = buf.capacity(); 72print("buf.capacity() = " + cap); 73for (var i = 0; i < cap; i++) { 74 print(buf.get(i)); 75} 76