/* Check that all descriptors have been returned */
  private static void checkDescriptors(
      ModelMBeanInfo modelMBeanInfo, Descriptor[] descriptors, String string) {
    int errCount = 0;
    final ArrayList<Descriptor> list = new ArrayList<Descriptor>(descriptors.length);
    list.addAll(Arrays.asList(descriptors));
    System.out.println("Got " + list.size() + " descriptors for " + string);

    // checks that MBean's descriptor is returned.
    //
    final Descriptor mbd = ((MBeanInfo) modelMBeanInfo).getDescriptor();
    if (!mbd.equals(remove(list, mbd))) {
      System.err.println("modelMBeanInfo.getDescriptor(): not found");
      errCount++;
    }

    // checks that MBean's attributes descriptors are returned.
    //
    final MBeanAttributeInfo[] attrs = modelMBeanInfo.getAttributes();
    for (MBeanAttributeInfo att : attrs) {
      final Descriptor ad = att.getDescriptor();
      final String name = att.getName();
      if (!ad.equals(remove(list, ad))) {
        System.err.println("attInfo.getDescriptor(): not found for " + name);
        errCount++;
      }
    }

    // checks that MBean's operations descriptors are returned.
    //
    final MBeanOperationInfo[] ops = modelMBeanInfo.getOperations();
    for (MBeanOperationInfo op : ops) {
      final Descriptor od = op.getDescriptor();
      final String name = op.getName();
      if (!od.equals(remove(list, od))) {
        System.err.println("opInfo.getDescriptor(): not found for " + name);
        errCount++;
      }
    }

    // checks that MBean's notifications descriptors are returned.
    //
    final MBeanNotificationInfo[] ntfs = modelMBeanInfo.getNotifications();
    for (MBeanNotificationInfo ntf : ntfs) {
      final Descriptor nd = ntf.getDescriptor();
      final String name = ntf.getName();
      if (!nd.equals(remove(list, nd))) {
        System.err.println("notifInfo.getDescriptor(): not found for " + name);
        errCount++;
      }
    }
    if (errCount > 0) {
      throw new RuntimeException(string + ": failed with " + errCount + " errors");
    } else if (list.size() != 0) {
      // Check that there are no additional descriptors
      //
      throw new RuntimeException(string + ": Unexpected remaining descriptors: " + list);
    } else System.out.println(string + ": PASSED");
  }
 private static void test(int testno) throws Exception {
   // com.sun.jmx.trace.TraceImplementation.init(2);
   Resource resource = new Resource();
   Class resourceClass = Resource.class;
   Class rmmbClass = RequiredModelMBean.class;
   Method setManagedResource =
       rmmbClass.getMethod("setManagedResource", new Class[] {Object.class, String.class});
   Method sendNotification =
       rmmbClass.getMethod("sendNotification", new Class[] {Notification.class});
   Method addAttributeChangeNL =
       rmmbClass.getMethod(
           "addAttributeChangeNotificationListener",
           new Class[] {NotificationListener.class, String.class, Object.class});
   Method getArray = resourceClass.getMethod("getArray", new Class[0]);
   Method getNumber = resourceClass.getMethod("getNumber", new Class[0]);
   Method setNumber = resourceClass.getMethod("setNumber", new Class[] {Integer.TYPE});
   Method tweakArray = resourceClass.getMethod("tweakArray", new Class[] {Object[].class});
   Method addOne = resourceClass.getMethod("addOne", new Class[] {Integer.TYPE});
   MBeanServer mbs = MBeanServerFactory.newMBeanServer();
   ObjectName on = new ObjectName("a:b=c");
   Descriptor attrDescr = new DescriptorSupport();
   attrDescr.setField("name", "Array");
   attrDescr.setField("descriptorType", "attribute");
   attrDescr.setField("getMethod", "getArray");
   ModelMBeanAttributeInfo attrInfo =
       new ModelMBeanAttributeInfo("Array", "array attr", getArray, null, attrDescr);
   Descriptor attrDescr2 = new DescriptorSupport();
   attrDescr2.setField("name", "Number");
   attrDescr2.setField("descriptorType", "attribute");
   attrDescr2.setField("getMethod", "getNumber");
   attrDescr2.setField("setMethod", "setNumber");
   ModelMBeanAttributeInfo attrInfo2 =
       new ModelMBeanAttributeInfo("Number", "number attr", getNumber, setNumber, attrDescr2);
   Descriptor attrDescr3 = new DescriptorSupport();
   attrDescr3.setField("name", "Local");
   attrDescr3.setField("descriptorType", "attribute");
   attrDescr3.setField("currencyTimeLimit", "" + Integer.MAX_VALUE);
   ModelMBeanAttributeInfo attrInfo3 =
       new ModelMBeanAttributeInfo(
           "Local", "java.lang.String", "local attr", true, true, false, attrDescr3);
   Descriptor attrDescr4 = new DescriptorSupport();
   attrDescr4.setField("name", "Local2");
   attrDescr4.setField("descriptorType", "attribute");
   ModelMBeanAttributeInfo attrInfo4 =
       new ModelMBeanAttributeInfo(
           "Local2", "java.lang.String", "local attr 2", true, true, false, attrDescr4);
   ModelMBeanAttributeInfo[] attrs =
       new ModelMBeanAttributeInfo[] {attrInfo, attrInfo2, attrInfo3, attrInfo4};
   ModelMBeanOperationInfo operInfo = new ModelMBeanOperationInfo("getArray descr", getArray);
   ModelMBeanOperationInfo operInfo2 = new ModelMBeanOperationInfo("getNumber descr", getNumber);
   ModelMBeanOperationInfo operInfo3 = new ModelMBeanOperationInfo("addOne descr", addOne);
   ModelMBeanOperationInfo operInfo4 = new ModelMBeanOperationInfo("setNumber descr", setNumber);
   ModelMBeanOperationInfo operInfo5 = new ModelMBeanOperationInfo("tweakArray descr", tweakArray);
   ModelMBeanOperationInfo operInfoSetManagedResource =
       new ModelMBeanOperationInfo("setManagedResource descr", setManagedResource);
   ModelMBeanOperationInfo operInfoSendNotification =
       new ModelMBeanOperationInfo("sendNotification descr", sendNotification);
   ModelMBeanOperationInfo operInfoAddAttributeChangeNL =
       new ModelMBeanOperationInfo("AddAttributeChangeNL descr", addAttributeChangeNL);
   ModelMBeanOperationInfo[] opers =
       new ModelMBeanOperationInfo[] {
         operInfo,
         operInfo2,
         operInfo3,
         operInfo4,
         operInfo5,
         operInfoSetManagedResource,
         operInfoSendNotification,
         operInfoAddAttributeChangeNL
       };
   ModelMBeanInfo info =
       new ModelMBeanInfoSupport(
           Resource.class.getName(), "Resourcish resource", attrs, null, opers, null, null);
   mbs.createMBean(
       RequiredModelMBean.class.getName(),
       on,
       new Object[] {info},
       new String[] {ModelMBeanInfo.class.getName()});
   mbs.invoke(
       on,
       "setManagedResource",
       new Object[] {resource, "objectReference"},
       new String[] {"java.lang.Object", "java.lang.String"});
   switch (testno) {
     case 0:
       {
         /* Check  getDescriptors("") on original MBeanInfo */
         final Descriptor[] desc = info.getDescriptors("");
         checkDescriptors(info, desc, "info.getDescriptors(\"\")");
         break;
       }
     case 1:
       {
         /* Check  getDescriptors(null) on original MBeanInfo */
         final Descriptor[] desc = info.getDescriptors(null);
         checkDescriptors(info, desc, "info.getDescriptors(null)");
         break;
       }
     case 2:
       {
         /* Check  getDescriptors("") on retrieved MBeanInfo */
         final MBeanInfo mbi = mbs.getMBeanInfo(on);
         final ModelMBeanInfo model = (ModelMBeanInfo) mbi;
         final Descriptor[] desc = model.getDescriptors("");
         checkDescriptors(info, desc, "model.getDescriptors(\"\")");
         break;
       }
     case 3:
       {
         /* Check  getDescriptors(null) on retrieved MBeanInfo */
         final MBeanInfo mbi = mbs.getMBeanInfo(on);
         final ModelMBeanInfo model = (ModelMBeanInfo) mbi;
         final Descriptor[] desc = model.getDescriptors(null);
         checkDescriptors(info, desc, "model.getDescriptors(null)");
         break;
       }
     default:
       System.err.println("UNKNOWN TEST NUMBER " + testno);
       break;
   }
 }