1 /*
   2  * Copyright (c) 2011, 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 7086192
  27  * @summary Verify functionality of AnnotatedElement methods on type variables
  28  * @author Joseph D. Darcy
  29  */
  30 
  31 import java.lang.reflect.*;
  32 import java.lang.annotation.*;
  33 
  34 public class TestAnnotatedElement<A> {
  35     // Type variable on a method
  36     private static <B> B m(B b) {return null;}
  37 
  38     // Type variable on a construtor
  39     private <C> TestAnnotatedElement(){super();}
  40 
  41     public static void main(String... argv) throws ReflectiveOperationException {
  42         int errors = 0;
  43 
  44         Class<?> clazz = TestAnnotatedElement.class;
  45         errors += testTypeVariable(clazz.getTypeParameters());
  46         errors += testTypeVariable(clazz.getDeclaredConstructor().getTypeParameters());
  47         errors += testTypeVariable(clazz.getDeclaredMethod("m", Object.class).getTypeParameters());
  48 
  49         if (errors > 0)
  50             throw new RuntimeException(errors + " failures");
  51     }
  52 
  53 
  54     private static int testTypeVariable(TypeVariable<?>[] typeVars) {
  55         int errors = 0;
  56         if (typeVars.length == 0)
  57             return ++errors;
  58 
  59         for(TypeVariable<?> typeVar : typeVars) {
  60             try {
  61                 typeVar.getAnnotation(null);
  62                 errors++;
  63             } catch(NullPointerException npe) {
  64                 ; // Expected
  65             }
  66 
  67             if (typeVar.getAnnotation(SuppressWarnings.class) != null)
  68                 errors++;
  69 
  70             try {
  71                 typeVar.isAnnotationPresent(null);
  72                 errors++;
  73             } catch(NullPointerException npe) {
  74                 ; // Expected
  75             }
  76 
  77             if (typeVar.isAnnotationPresent(SuppressWarnings.class))
  78                 errors++;
  79 
  80             if(typeVar.getAnnotations().length != 0)
  81                 errors++;
  82 
  83             if(typeVar.getDeclaredAnnotations().length != 0)
  84                 errors++;
  85         }
  86         return errors;
  87     }
  88 }