1 /*
   2  * Copyright 2004 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 5015676 4987888 4997464
  27  * @summary Testing upper bounds and availability of toString methods
  28  * @author Joseph D. Darcy
  29  */
  30 
  31 import java.lang.reflect.*;
  32 import java.util.List;
  33 import java.util.Collection;
  34 
  35 class A<T> {
  36     class B<U> {}
  37 }
  38 
  39 class Test<T> {
  40     static class Inner1<U> {
  41         void bar(U[] array1) { return;}
  42     }
  43 
  44     class Inner2<V> {
  45         List<?> foo2(List<? extends V> t) {
  46             return null;
  47         }
  48     }
  49 
  50     static <S extends Object & Comparable<? super S> > S max(Collection<? extends S> coll) {
  51         return null;
  52     }
  53 
  54     List<? extends T> foo(List<? super T> t) {
  55         return null;
  56     }
  57 }
  58 
  59 public class StringsAndBounds {
  60     public void f(A<String>.B<Integer> x) {
  61     }
  62 
  63     public <T>  void g(T a) {return ;}
  64 
  65     static void scanner(Class clazz) {
  66         System.out.println("\n\nScanning " + clazz.getName());
  67 
  68         for(Class c: clazz.getDeclaredClasses()) {
  69             scanner(c);
  70         }
  71 
  72         for(Method m: clazz.getDeclaredMethods()) {
  73             System.out.println("\nMethod:\t" + m.toString()); // Need toGenericString?
  74             System.out.println("\tReturn Type: " + m.getGenericReturnType().toString() );
  75             for(Type p: m.getGenericParameterTypes()) {
  76                 if (p instanceof WildcardType) { // Check upper bounds
  77                     Type[] upperBounds = ((WildcardType)p).getUpperBounds();
  78                     if (upperBounds.length < 1 ||
  79                         upperBounds[0] == null)
  80                         throw new RuntimeException("Malformed upper bounds: " + p);
  81 
  82                 }
  83 
  84                 System.out.println("\tParameter: " + p.toString());
  85             }
  86         }
  87     }
  88 
  89     public static void main(String[] argv) throws Exception {
  90         scanner(StringsAndBounds.class);
  91         scanner(A.B.class);
  92         scanner(Test.class);
  93     }
  94 }