1 /*
   2  * Copyright (c) 2007, 2015, 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  * @test
  26  * @bug 6518061
  27  * @summary Test that an MBean interface can inherit two methods with
  28  * the same signature from two unrelated parent interfaces
  29  * @author Eamonn McManus
  30  */
  31 
  32 import java.util.*;
  33 import java.lang.reflect.*;
  34 import javax.management.*;
  35 
  36 public class DuplicateGetterTest {
  37     public static interface FooMBean {
  38         public MBeanNotificationInfo[] getNotificationInfo();
  39     }
  40 
  41     public static interface BazMBean {
  42         public MBeanNotificationInfo[] getNotificationInfo();
  43     }
  44 
  45     public static interface BarMBean extends FooMBean, BazMBean {
  46     }
  47 
  48     public static class Bar implements BarMBean {
  49         public MBeanNotificationInfo[] getNotificationInfo() {
  50             return null;
  51         }
  52     }
  53 
  54     public static void main(String[] args) throws Exception {
  55         System.out.println("Testing that inheriting the same getter from " +
  56                            "more than one interface does not cause problems");
  57         DynamicMBean mbean =
  58             new StandardMBean(new Bar(), BarMBean.class);
  59         // Before fix, preceding line threw exception
  60         MBeanAttributeInfo[] attrs = mbean.getMBeanInfo().getAttributes();
  61         System.out.println("Attributes: " + Arrays.toString(attrs));
  62         if (attrs.length != 1)
  63             throw new Exception("Wrong number of attributes: " + attrs.length);
  64         if (!attrs[0].getName().equals("NotificationInfo"))
  65             throw new Exception("Wrong attribute name: " + attrs[0].getName());
  66         System.out.println("Test passed");
  67     }
  68 }