1 /*

     2  * Copyright 2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any 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  * @compile -g OverridesSpecEx.java

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

    31  */

    32 

    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.*;

    39 

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

    41 

    42 

    43 @SupportedSourceVersion(SourceVersion.RELEASE_6)

    44 @SupportedAnnotationTypes("*")

    45 public class OverridesSpecEx extends AbstractProcessor {

    46 

    47     Elements elements;

    48     Types types;

    49 

    50     public void init(ProcessingEnvironment penv) {

    51         super.init(penv);

    52         elements = penv.getElementUtils();

    53         types =  penv.getTypeUtils();

    54     }

    55 

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

    57                            RoundEnvironment round) {

    58         if (!round.processingOver())

    59             doit(annoTypes, round);

    60         return true;

    61     }

    62 

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

    64                       RoundEnvironment round) {

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

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

    67 

    68         ExecutableElement m1 = null;

    69         ExecutableElement m2 = null;

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

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

    72                 m1 = m;

    73                 break;

    74             }

    75         }

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

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

    78                 m2 = m;

    79                 break;

    80             }

    81         }

    82 

    83         boolean res =

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

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

    86         checkResult(res);

    87 

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

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

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

    91 

    92         m1 = null;

    93         m2 = null;

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

    95             m1 = m;

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

    97             m2 = m;

    98 

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

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

   101         checkResult(!res);

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

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

   104         checkResult(res);

   105     }

   106 

   107     private static void checkResult(boolean truthiness) {

   108         if (!truthiness)

   109             throw new AssertionError("Bogus result");

   110     }

   111 

   112 

   113     // Fodder for the processor

   114 

   115     class A {

   116         public void m() {}

   117     }

   118     interface B {

   119         void m();

   120     }

   121     class C extends A implements B {

   122     }

   123 }