jdk8-mips64-public/langtools: test/tools/javac/processing/model/util/OverridesSpecEx.java@9d9f26857129

     1 /*

     2  * Copyright (c) 2006, 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  */

    24 /*

    25  * @test

    26  * @bug     6453386

    27  * @summary Verify that example code in Elements.overrides works as spec'ed.

    28  * @author  Scott Seligman

    29  * @compile -g OverridesSpecEx.java

    30  * @compile -processor OverridesSpecEx -proc:only OverridesSpecEx.java

    31  */

    33 import java.util.Set;

    34 import javax.annotation.processing.*;

    35 import javax.lang.model.SourceVersion;

    36 import javax.lang.model.element.*;

    37 import javax.lang.model.type.*;

    38 import javax.lang.model.util.*;

    40 import static javax.lang.model.util.ElementFilter.*;

    43 @SupportedAnnotationTypes("*")

    44 public class OverridesSpecEx extends AbstractProcessor {

    46     Elements elements;

    47     Types types;

    49     public void init(ProcessingEnvironment penv) {

    50         super.init(penv);

    51         elements = penv.getElementUtils();

    52         types =  penv.getTypeUtils();

    53     }

    55     public boolean process(Set<? extends TypeElement> annoTypes,

    56                            RoundEnvironment round) {

    57         if (!round.processingOver())

    58             doit(annoTypes, round);

    59         return true;

    60     }

    62     @Override

    63     public SourceVersion getSupportedSourceVersion() {

    64         return SourceVersion.latest();

    65     }

    67     private void doit(Set<? extends TypeElement> annoTypes,

    68                       RoundEnvironment round) {

    69         TypeElement string = elements.getTypeElement("java.lang.String");

    70         TypeElement object = elements.getTypeElement("java.lang.Object");

    72         ExecutableElement m1 = null;

    73         ExecutableElement m2 = null;

    74         for (ExecutableElement m : methodsIn(string.getEnclosedElements())) {

    75             if (m.getSimpleName().contentEquals("hashCode")) {

    76                 m1 = m;

    77                 break;

    78             }

    79         }

    80         for (ExecutableElement m : methodsIn(object.getEnclosedElements())) {

    81             if (m.getSimpleName().contentEquals("hashCode")) {

    82                 m2 = m;

    83                 break;

    84             }

    85         }

    87         boolean res =

    88             elements.overrides(m1, m2, (TypeElement) m1.getEnclosingElement());

    89         System.out.println("String.hashCode overrides Object.hashCode?  " + res);

    90         checkResult(res);

    92         TypeElement a = elements.getTypeElement("OverridesSpecEx.A");

    93         TypeElement b = elements.getTypeElement("OverridesSpecEx.B");

    94         TypeElement c = elements.getTypeElement("OverridesSpecEx.C");

    96         m1 = null;

    97         m2 = null;

    98         for (ExecutableElement m : methodsIn(a.getEnclosedElements()))

    99             m1 = m;

   100         for (ExecutableElement m : methodsIn(b.getEnclosedElements()))

   101             m2 = m;

   103         res = elements.overrides(m1, m2, a);

   104         System.out.println("A.m overrides B.m in B?  " + res);

   105         checkResult(!res);

   106         res = elements.overrides(m1, m2, c);

   107         System.out.println("A.m overrides B.m in C?  " + res);

   108         checkResult(res);

   109     }

   111     private static void checkResult(boolean truthiness) {

   112         if (!truthiness)

   113             throw new AssertionError("Bogus result");

   114     }

   117     // Fodder for the processor

   119     class A {

   120         public void m() {}

   121     }

   122     interface B {

   123         void m();

   124     }

   125     class C extends A implements B {

   126     }

   127 }

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