1 #// Usage: jjs -scripting foreignobject.js
   2 
   3 /*
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   6  * Redistribution and use in source and binary forms, with or without
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  11  *     notice, this list of conditions and the following disclaimer.
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  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.
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  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,
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  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());