1 /*
2  * Copyright (c) 2006, 2018, 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     6423972
27  * @summary Tests TypeParameter.getBounds.
28  * @author  Scott Seligman
29  * @library /tools/javac/lib
30  * @modules java.compiler
31  *          jdk.compiler
32  * @build   JavacTestingAbstractProcessor TypeParamBounds
33  * @compile -processor TypeParamBounds -proc:only TypeParamBounds.java
34  */
35 
36 import java.util.HashMap;
37 import java.util.List;
38 import java.util.Map;
39 import java.util.Set;
40 import javax.annotation.processing.*;
41 import javax.lang.model.SourceVersion;
42 import javax.lang.model.element.*;
43 import javax.lang.model.type.*;
44 import javax.lang.model.util.*;
45 
46 public class TypeParamBounds extends JavacTestingAbstractProcessor {
process(Set<? extends TypeElement> annoTypes, RoundEnvironment round)47     public boolean process(Set<? extends TypeElement> annoTypes,
48                            RoundEnvironment round) {
49         if (!round.processingOver())
50             doit(annoTypes, round);
51         return true;
52     }
53 
doit(Set<? extends TypeElement> annoTypes, RoundEnvironment round)54     private void doit(Set<? extends TypeElement> annoTypes,
55                       RoundEnvironment round) {
56         TypeElement gen = elements.getTypeElement("TypeParamBounds.Gen");
57 
58         // For each type parameter of Gen, compare its bounds with the
59         // bounds that are expected.
60         //
61         for (TypeParameterElement tparam : gen.getTypeParameters()) {
62             System.out.println(tparam);
63             List<? extends TypeMirror> bounds = tparam.getBounds();
64             String[] expected = Gen.boundNames.get(tparam + "");
65 
66             if (bounds.size() != expected.length)
67                 throw new AssertionError();
68             int i = 0;
69             for (TypeMirror bound : bounds) {
70                 Name got = types.asElement(bound).getSimpleName();
71                 String shoulda = expected[i++];
72                 System.out.println("  " + got);
73                 if (!got.contentEquals(shoulda))
74                     throw new AssertionError(shoulda);
75             }
76         }
77     }
78 
79 
80     // Fodder for the processor
81     static class Gen<T, U extends Object, V extends Number, W extends U,
82                      X extends Runnable, Y extends CharSequence & Runnable,
83                      Z extends Object & Runnable> {
84 
85         // The names of the bounds of each type parameter of Gen.
86         static Map<String, String[]> boundNames =
87             Map.of("T", new String[] {"Object"},
88                    "U", new String[] {"Object"},
89                    "V", new String[] {"Number"},
90                    "W", new String[] {"U"},
91                    "X", new String[] {"Runnable"},
92                    "Y", new String[] {"CharSequence", "Runnable"},
93                    "Z", new String[] {"Object", "Runnable"});
94     }
95 }
96