1 #// Usage: jjs -scripting foreignobject.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

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    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

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    28  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

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    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 // cross nashorn engine scripting

    35 // access script objects from other engines in natural syntax

    36 

    37 var ScriptEngineManager = Java.type("javax.script.ScriptEngineManager");

    38 // create manager

    39 var manager = new ScriptEngineManager();

    40 // create engine

    41 var engine = manager.getEngineByName("js");

    42 

    43 // eval code!

    44 engine.eval(<<CODE

    45     var obj = {

    46         foo: 42,

    47         func: function() {

    48             print("func: " + this.foo);

    49         }

    50     };

    51 CODE);

    52 

    53 // Nashorn engine returns script objects as instance of

    54 // the class jdk.nashorn.api.scripting.ScriptObjectMirror

    55 // But nashorn's dynalink linker can treat these objects

    56 // specially to support natural script syntax to access..

    57 // In Java code, you need to use ScriptObjectMirror's 

    58 // methods though. Once again, script world is simpler :-)

    59 

    60 var foreignObj = engine.get("obj");

    61 // access properties, functions of it

    62 // with natural syntax

    63 print(foreignObj.foo);

    64 foreignObj.func();

    65 print(typeof foreignObj.func);

    66 

    67 // access engine's global

    68 var foreignGlobal = engine.eval("this");

    69 // create objects in engine's world from here!

    70 print(new foreignGlobal.Object());

    71 print(new foreignGlobal.Date());