Java example source code file (Test5.java)

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Java - Java tags/keywords

bindings, exception, filereader, integer, reader, scriptenginemanager, simplebindings, simplescriptcontext, test5

The Test5.java Java example source code

/*
 * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * @test
 * @bug 6249843 6705893
 * @summary Tests engine, global scopes and scope hiding.
 */

import java.io.*;
import javax.script.*;

public class Test5 {
        public static void main(String[] args) throws Exception {
                System.out.println("\nTest5\n");
                ScriptEngineManager m = new ScriptEngineManager();
                ScriptEngine engine = Helper.getJsEngine(m);
                if (engine == null) {
                    System.out.println("Warning: No js engine found; test vacuously passes.");
                    return;
                }
                Bindings g = new SimpleBindings();
                Bindings e = new SimpleBindings();
                g.put("key", "value in global");
                e.put("key", "value in engine");
                ScriptContext ctxt = new SimpleScriptContext();
                ctxt.setBindings(e, ScriptContext.ENGINE_SCOPE);
                System.out.println("engine scope only");
                e.put("count", new Integer(1));

                try (Reader reader = new FileReader(
                    new File(System.getProperty("test.src", "."), "Test5.js"))) {
                    engine.eval(reader,ctxt);
                }

                System.out.println("both scopes");
                ctxt.setBindings(g, ScriptContext.GLOBAL_SCOPE);
                e.put("count", new Integer(2));
                try (Reader reader = new FileReader(
                    new File(System.getProperty("test.src", "."), "Test5.js"))) {
                    engine.eval(reader,ctxt);
                }
                System.out.println("only global");
                e.put("count", new Integer(3));
                ctxt.removeAttribute("key", ScriptContext.ENGINE_SCOPE);
                try (Reader reader = new FileReader(
                    new File(System.getProperty("test.src", "."), "Test5.js"))) {
                    engine.eval(reader,ctxt);
                }
        }
}