1 /*
   2  * Copyright (c) 2013, 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 8004698
  27  * @summary Unit test for annotations on TypeVariables
  28  */
  29 
  30 import java.util.*;
  31 import java.lang.annotation.*;
  32 import java.lang.reflect.*;
  33 import java.io.Serializable;
  34 
  35 public class TypeParamAnnotation {
  36     public static void main(String[] args) throws Exception {
  37         testOnClass();
  38         testOnMethod();
  39         testGetAnno();
  40         testGetAnnos();
  41     }
  42 
  43     private static void check(boolean b) {
  44         if (!b)
  45             throw new RuntimeException();
  46     }
  47 
  48     private static void testOnClass() {
  49         TypeVariable<?>[] ts = TypeParam.class.getTypeParameters();
  50         check(ts.length == 3);
  51 
  52         Annotation[] as;
  53 
  54         as = ts[0].getAnnotations();
  55         check(as.length == 2);
  56         check(((ParamAnno)as[0]).value().equals("t"));
  57         check(((ParamAnno2)as[1]).value() == 1);
  58 
  59         as = ts[1].getAnnotations();
  60         check(as.length == 0);
  61 
  62         as = ts[2].getAnnotations();
  63         check(as.length == 2);
  64         check(((ParamAnno)as[0]).value().equals("v"));
  65         check(((ParamAnno2)as[1]).value() == 2);
  66     }
  67     private static void testOnMethod() throws Exception {
  68         TypeVariable<?>[] ts = TypeParam.class.getDeclaredMethod("foo").getTypeParameters();
  69         check(ts.length == 3);
  70 
  71         Annotation[] as;
  72 
  73         as = ts[0].getAnnotations();
  74         check(as.length == 2);
  75         check(((ParamAnno)as[0]).value().equals("x"));
  76         check(((ParamAnno2)as[1]).value() == 3);
  77 
  78         as = ts[1].getAnnotations();
  79         check(as.length == 0);
  80 
  81         as = ts[2].getAnnotations();
  82         check(as.length == 2);
  83         check(((ParamAnno)as[0]).value().equals("z"));
  84         check(((ParamAnno2)as[1]).value() == 4);
  85     }
  86 
  87     private static void testGetAnno() {
  88         TypeVariable<?>[] ts = TypeParam.class.getTypeParameters();
  89         ParamAnno a;
  90         a = ts[0].getAnnotation(ParamAnno.class);
  91         check(a.value().equals("t"));
  92     }
  93     private static void testGetAnnos() throws Exception {
  94         TypeVariable<?>[] ts = TypeParam.class.getDeclaredMethod("foo").getTypeParameters();
  95         ParamAnno2[] as;
  96         as = ts[0].getAnnotations(ParamAnno2.class);
  97         check(as.length == 1);
  98         check(as[0].value() == 3);
  99     }
 100 }
 101 
 102 class TypeParam <@ParamAnno("t") @ParamAnno2(1) T,
 103                  U,
 104                  @ParamAnno("v") @ParamAnno2(2) V extends Runnable> {
 105     public <@ParamAnno("x") @ParamAnno2(3) X,
 106             Y,
 107             @ParamAnno("z") @ParamAnno2(4) Z extends Cloneable> void foo() {}
 108 }
 109 
 110 @Target(ElementType.TYPE_PARAMETER)
 111 @Retention(RetentionPolicy.RUNTIME)
 112 @interface ParamAnno {
 113     String value();
 114 }
 115 
 116 @Target(ElementType.TYPE_PARAMETER)
 117 @Retention(RetentionPolicy.RUNTIME)
 118 @interface ParamAnno2 {
 119     int value();
 120 }