Mon, 02 Jul 2018 16:43:07 +0100
Merge
sundar@1524 | 1 | /* |
sundar@1524 | 2 | * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
sundar@1524 | 3 | * |
sundar@1524 | 4 | * Redistribution and use in source and binary forms, with or without |
sundar@1524 | 5 | * modification, are permitted provided that the following conditions |
sundar@1524 | 6 | * are met: |
sundar@1524 | 7 | * |
sundar@1524 | 8 | * - Redistributions of source code must retain the above copyright |
sundar@1524 | 9 | * notice, this list of conditions and the following disclaimer. |
sundar@1524 | 10 | * |
sundar@1524 | 11 | * - Redistributions in binary form must reproduce the above copyright |
sundar@1524 | 12 | * notice, this list of conditions and the following disclaimer in the |
sundar@1524 | 13 | * documentation and/or other materials provided with the distribution. |
sundar@1524 | 14 | * |
sundar@1524 | 15 | * - Neither the name of Oracle nor the names of its |
sundar@1524 | 16 | * contributors may be used to endorse or promote products derived |
sundar@1524 | 17 | * from this software without specific prior written permission. |
sundar@1524 | 18 | * |
sundar@1524 | 19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
sundar@1524 | 20 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
sundar@1524 | 21 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
sundar@1524 | 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
sundar@1524 | 23 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
sundar@1524 | 24 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
sundar@1524 | 25 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
sundar@1524 | 26 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
sundar@1524 | 27 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
sundar@1524 | 28 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
sundar@1524 | 29 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
sundar@1524 | 30 | */ |
sundar@1524 | 31 | |
sundar@1524 | 32 | import javax.script.*; |
sundar@1524 | 33 | import java.util.function.*; |
sundar@1524 | 34 | |
sundar@1524 | 35 | // example demonstrating that arbitrary Lambda can be called as function from script |
sundar@1524 | 36 | |
sundar@1524 | 37 | public class LambdaAsFunc { |
sundar@1524 | 38 | public static void main(String[] args) throws Exception { |
sundar@1524 | 39 | ScriptEngineManager m = new ScriptEngineManager(); |
sundar@1524 | 40 | ScriptEngine e = m.getEngineByName("nashorn"); |
sundar@1524 | 41 | |
sundar@1524 | 42 | // expose a lambda as top-level script function |
sundar@1524 | 43 | e.put("upper", (Function<String, String>) String::toUpperCase); |
sundar@1524 | 44 | |
sundar@1524 | 45 | // call lambda as though it is a normal script function |
sundar@1524 | 46 | System.out.println(e.eval("upper('hello')")); |
sundar@1524 | 47 | } |
sundar@1524 | 48 | } |