1 #// Usage: jjs -scripting interface2.js
   2 
   3 /*
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  13  *   - Redistributions in binary form must reproduce the above copyright
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  15  *     documentation and/or other materials provided with the distribution.
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  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();