1 /*
   2  * Copyright (c) 2003, 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  * A collection of utility methods used by the SelectorProvider.inheritedChannel
  26  * unit tests.
  27  */
  28 import java.net.*;
  29 import java.io.*;
  30 import java.nio.channels.*;
  31 import java.lang.reflect.*;


  32 
  33 public class Util {
  34 
  35     private static Object get(String className, String fieldName, Object o) throws Exception {
  36         Class cl = Class.forName(className);
  37         Field fld = cl.getDeclaredField(fieldName);
  38         fld.setAccessible(true);
  39         return fld.get(o);
  40     }
  41 
  42     private static int fdVal(FileDescriptor fdObj) throws Exception {
  43         Object fdVal = get("java.io.FileDescriptor", "fd", fdObj);
  44         return ((Integer)fdVal).intValue();
  45     }
  46 
  47     /*
  48      * Return the file descriptor underlying a given SocketChannel
  49      */
  50     public static int getFD(SocketChannel sc) {
  51         try {

   1 /*
   2  * Copyright (c) 2003, 2017, 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  * A collection of utility methods used by the SelectorProvider.inheritedChannel
  26  * unit tests.
  27  */
  28 import java.io.File;
  29 import java.io.FileDescriptor;
  30 import java.lang.reflect.Field;
  31 import java.nio.channels.DatagramChannel;
  32 import java.nio.channels.ServerSocketChannel;
  33 import java.nio.channels.SocketChannel;
  34 
  35 public class Util {
  36 
  37     private static Object get(String className, String fieldName, Object o) throws Exception {
  38         Class cl = Class.forName(className);
  39         Field fld = cl.getDeclaredField(fieldName);
  40         fld.setAccessible(true);
  41         return fld.get(o);
  42     }
  43 
  44     private static int fdVal(FileDescriptor fdObj) throws Exception {
  45         Object fdVal = get("java.io.FileDescriptor", "fd", fdObj);
  46         return ((Integer)fdVal).intValue();
  47     }
  48 
  49     /*
  50      * Return the file descriptor underlying a given SocketChannel
  51      */
  52     public static int getFD(SocketChannel sc) {
  53         try {