1/*
2 * Copyright (c) 2006, 2015, 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     6453386
27 * @summary Verify that example code in Elements.overrides works as spec'ed.
28 * @author  Scott Seligman
29 * @library /tools/javac/lib
30 * @modules java.compiler
31 *          jdk.compiler
32 * @build JavacTestingAbstractProcessor
33 * @compile -g OverridesSpecEx.java
34 * @compile -processor OverridesSpecEx -proc:only OverridesSpecEx.java
35 */
36
37import java.util.Set;
38import javax.annotation.processing.*;
39import javax.lang.model.SourceVersion;
40import javax.lang.model.element.*;
41import javax.lang.model.type.*;
42import javax.lang.model.util.*;
43
44import static javax.lang.model.util.ElementFilter.*;
45
46public class OverridesSpecEx extends JavacTestingAbstractProcessor {
47    public boolean process(Set<? extends TypeElement> annoTypes,
48                           RoundEnvironment round) {
49        if (!round.processingOver())
50            doit(annoTypes, round);
51        return true;
52    }
53
54    private void doit(Set<? extends TypeElement> annoTypes,
55                      RoundEnvironment round) {
56        TypeElement string = elements.getTypeElement("java.lang.String");
57        TypeElement object = elements.getTypeElement("java.lang.Object");
58
59        ExecutableElement m1 = null;
60        ExecutableElement m2 = null;
61        for (ExecutableElement m : methodsIn(string.getEnclosedElements())) {
62            if (m.getSimpleName().contentEquals("hashCode")) {
63                m1 = m;
64                break;
65            }
66        }
67        for (ExecutableElement m : methodsIn(object.getEnclosedElements())) {
68            if (m.getSimpleName().contentEquals("hashCode")) {
69                m2 = m;
70                break;
71            }
72        }
73
74        boolean res =
75            elements.overrides(m1, m2, (TypeElement) m1.getEnclosingElement());
76        System.out.println("String.hashCode overrides Object.hashCode?  " + res);
77        checkResult(res);
78
79        TypeElement a = elements.getTypeElement("OverridesSpecEx.A");
80        TypeElement b = elements.getTypeElement("OverridesSpecEx.B");
81        TypeElement c = elements.getTypeElement("OverridesSpecEx.C");
82
83        m1 = null;
84        m2 = null;
85        for (ExecutableElement m : methodsIn(a.getEnclosedElements()))
86            m1 = m;
87        for (ExecutableElement m : methodsIn(b.getEnclosedElements()))
88            m2 = m;
89
90        res = elements.overrides(m1, m2, a);
91        System.out.println("A.m overrides B.m in B?  " + res);
92        checkResult(!res);
93        res = elements.overrides(m1, m2, c);
94        System.out.println("A.m overrides B.m in C?  " + res);
95        checkResult(res);
96    }
97
98    private static void checkResult(boolean truthiness) {
99        if (!truthiness)
100            throw new AssertionError("Bogus result");
101    }
102
103    // Fodder for the processor
104    class A {
105        public void m() {}
106    }
107    interface B {
108        void m();
109    }
110    class C extends A implements B {
111    }
112}
113