nashorn/docs/source/MultiScopes.java
author dlong
Thu, 08 Sep 2016 23:43:45 -0400
changeset 41066 e8c366069761
parent 27361 86c4ddb4797b
permissions -rw-r--r--
Merge
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/*
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 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 *   - Redistributions of source code must retain the above copyright
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 *     notice, this list of conditions and the following disclaimer.
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 *
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 *   - Redistributions in binary form must reproduce the above copyright
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 *     notice, this list of conditions and the following disclaimer in the
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 *     documentation and/or other materials provided with the distribution.
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 *
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 *   - Neither the name of Oracle nor the names of its
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 *     contributors may be used to endorse or promote products derived
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 *     from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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import javax.script.Bindings;
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import javax.script.ScriptContext;
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import javax.script.ScriptEngine;
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import javax.script.ScriptEngineManager;
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import javax.script.SimpleScriptContext;
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@SuppressWarnings("javadoc")
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public class MultiScopes {
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    public static void main(final String[] args) throws Exception {
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        final ScriptEngineManager manager = new ScriptEngineManager();
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        final ScriptEngine engine = manager.getEngineByName("nashorn");
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        engine.put("x", "hello");
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        // print global variable "x"
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        engine.eval("print(x);");
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        // the above line prints "hello"
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        // Now, pass a different script context
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        final ScriptContext newContext = new SimpleScriptContext();
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        newContext.setBindings(engine.createBindings(), ScriptContext.ENGINE_SCOPE);
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        final Bindings engineScope = newContext.getBindings(ScriptContext.ENGINE_SCOPE);
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        // add new variable "x" to the new engineScope
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        engineScope.put("x", "world");
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        // execute the same script - but this time pass a different script context
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        engine.eval("print(x);", newContext);
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        // the above line prints "world"
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    }
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}
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