| #// Usage: jjs -scripting -cp . jsobject.js |
| |
| /* |
| * Copyright (c) 2014, 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. |
| */ |
| |
| // This sample demonstrats how to expose a |
| // script friendly object from your java code |
| // by implementing jdk.nashorn.api.scripting.JSObject |
| |
| // compile the java program |
| `javac BufferArray.java`; |
| |
| // print error, if any and exit |
| if ($ERR != '') { |
| print($ERR); |
| exit($EXIT); |
| } |
| |
| // create BufferArray |
| var BufferArray = Java.type("BufferArray"); |
| var bb = new BufferArray(10); |
| |
| // 'magic' methods called to retrieve set/get |
| // properties on BufferArray instance |
| var len = bb.length; |
| print("bb.length = " + len) |
| for (var i = 0; i < len; i++) { |
| bb[i] = i*i; |
| } |
| |
| for (var i = 0; i < len; i++) { |
| print(bb[i]); |
| } |
| |
| // get underlying buffer by calling a method |
| // on BufferArray magic object |
| |
| // 'buf' is a function member |
| print(typeof bb.buf); |
| var buf = bb.buf(); |
| |
| // use retrieved underlying nio buffer |
| var cap = buf.capacity(); |
| print("buf.capacity() = " + cap); |
| for (var i = 0; i < cap; i++) { |
| print(buf.get(i)); |
| } |