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