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 8007278
27 * @summary Unit test for annotations on TypeVariables
28 */
29
30import java.util.*;
31import java.lang.annotation.*;
32import java.lang.reflect.*;
33import java.io.Serializable;
34
35public 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].getAnnotationsByType(ParamAnno2.class);
97        check(as.length == 1);
98        check(as[0].value() == 3);
99    }
100}
101
102class 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}
121