1 /*
   2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 public class BasicLambdaApp {
  26     static boolean isRuntime;
  27     public static void main(String[] args) {
  28         isRuntime = (args.length == 1 && args[0].equals("run")) ? true : false;
  29         testNonCapturingLambda();
  30         testCapturingLambda();
  31     }
  32 
  33     static void testNonCapturingLambda() {
  34         doit(() -> {
  35             System.out.println("Hello from Lambda");
  36             LambdaVerification.verifyCallerIsArchivedLambda(isRuntime);
  37         });
  38     }
  39 
  40     static int lastX;
  41     static void testCapturingLambda() {
  42         lastX = -1;
  43         for (int i=0; i<10; i++) {
  44             final int x = i;
  45             doit(() -> {
  46                 if (x != lastX + 1) {
  47                     throw new RuntimeException(x + " != " + (lastX + 1));
  48                 }
  49                 lastX = x;
  50                 LambdaVerification.verifyCallerIsArchivedLambda(isRuntime);
  51             });
  52         }
  53     }
  54 
  55     static void doit(Runnable t) {
  56         t.run();
  57     }
  58 }