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