1 /*
   2  * Copyright (c) 2019, Red Hat, Inc
   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 package fib;
  24 public class FibJNI {
  25 
  26     static {
  27         // Native lib used for debug symbols stripping
  28         System.loadLibrary("Fib");
  29     }
  30 
  31     private final int num;
  32     private final long expected;
  33 
  34     public FibJNI(int num, long expected) {
  35         this.num = num;
  36         this.expected = expected;
  37     }
  38 
  39     public void callNative() {
  40         callJNI(this, num);
  41     }
  42 
  43     // Called from JNI library libFib
  44     private void callback(long val) {
  45         System.out.println("Debug: result was: " + val);
  46         if (val != expected) {
  47             throw new RuntimeException("Expected " + expected + " but got: " +val);
  48         }
  49     }
  50 
  51     public static native void callJNI(Object target, int num);
  52 
  53     public static void main(String[] args) {
  54         if (args.length != 2) {
  55             System.err.println("Usage: " + FibJNI.class.getName() + " <input> <expectedResult>");
  56         }
  57         int input = Integer.parseInt(args[0]);
  58         long expected = Long.parseLong(args[1]);
  59         FibJNI fib = new FibJNI(input, expected);
  60         fib.callNative();
  61         System.out.println("DEBUG: Sanity check for " + FibJNI.class.getSimpleName() + " passed.");
  62     }
  63 }