1 #// Usage: jjs -scripting interface.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 // Example demonstrating how to implement a Java interface
  35 // whose methods are backed by global script functions
  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 function run() {
  47     print("run global function called");
  48 }
  49 CODE);
  50 
  51 // create Java interface object whose methods are
  52 // implemented by script functions. This is from
  53 // javax.script.Invocable. But we are in JS world,
  54 // don't worry about types :)
  55 
  56 var Runnable = Java.type("java.lang.Runnable");
  57 var r = engine.getInterface(Runnable.class);
  58 print(r.class);
  59 
  60 r.run();