1 /*
   2  * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * 
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 
   8  *   - Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  * 
  11  *   - Redistributions in binary form must reproduce the above copyright
  12  *     notice, this list of conditions and the following disclaimer in the
  13  *     documentation and/or other materials provided with the distribution.
  14  * 
  15  *   - Neither the name of Oracle nor the names of its
  16  *     contributors may be used to endorse or promote products derived
  17  *     from this software without specific prior written permission.
  18  * 
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  20  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  21  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  26  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  27  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  28  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  29  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31 
  32 import javax.script.*;
  33 
  34 public class MultiScopes {
  35     public static void main(String[] args) throws Exception {
  36         ScriptEngineManager manager = new ScriptEngineManager();
  37         ScriptEngine engine = manager.getEngineByName("nashorn");
  38 
  39         engine.put("x", "hello");
  40         // print global variable "x"
  41         engine.eval("print(x);");
  42         // the above line prints "hello"
  43 
  44         // Now, pass a different script context
  45         ScriptContext newContext = new SimpleScriptContext();
  46         newContext.setBindings(engine.createBindings(), ScriptContext.ENGINE_SCOPE);
  47         Bindings engineScope = newContext.getBindings(ScriptContext.ENGINE_SCOPE);
  48 
  49         // add new variable "x" to the new engineScope        
  50         engineScope.put("x", "world");
  51 
  52         // execute the same script - but this time pass a different script context
  53         engine.eval("print(x);", newContext);
  54         // the above line prints "world"
  55     }
  56 }
  57 
  58