callmethod.js revision 802:235d22ccfd24 
1#// Usage: jjs -scripting callmethod.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// simple example demonstrating calling a script object
35// method from script engine user code
36
37var ScriptEngineManager = Java.type("javax.script.ScriptEngineManager");
38// create manager
39var manager = new ScriptEngineManager();
40// create engine
41var engine = manager.getEngineByName("js");
42
43// eval code - too many script escapes?
44// use heredoc !
45engine.eval(<<CODE
46    var obj = {
47        func: function() {
48            print("I am func of " + this);
49        },
50
51        toString: function() {
52            return "Object 'obj'";
53        }
54   };
55CODE);
56
57// invoke methods of an object in script world
58// from javax.script.Invocable interface. But, hey,
59// calling code is JavaScript and don't worry about types :)
60
61// get that script object on which to call a method
62var scriptObj = engine.get("obj");
63// call 'func' method on object 'obj'
64engine.invokeMethod(scriptObj, "func");
65