1 #// Usage: jjs -scripting interface2.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

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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

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    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 // Simple example demonstrating how to implement java interface

    35 // whose methods are backed by script methods of a script object

    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 - too many script escapes?

    44 // use heredoc !

    45 engine.eval(<<CODE

    46   var obj = {

    47     run: function() {

    48         print("I am run method of 'obj'");

    49     }

    50   };

    51 CODE);

    52 

    53 // create Java interface object whose methods are

    54 // implemented by script methods of a script object

    55 // This is from javax.script.Invocable. But we are

    56 // in JS world, don't worry about types :)

    57 

    58 var Runnable = Java.type("java.lang.Runnable");

    59 

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

    61 var r = engine.getInterface(scriptObj, Runnable.class);

    62 print(r.class);

    63 r.run();