1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   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 ../../../lib
  30  * @build JavacTestingAbstractProcessor
  31  * @compile -g OverridesSpecEx.java
  32  * @compile -processor OverridesSpecEx -proc:only OverridesSpecEx.java
  33  */
  34 
  35 import java.util.Set;
  36 import javax.annotation.processing.*;
  37 import javax.lang.model.SourceVersion;
  38 import javax.lang.model.element.*;
  39 import javax.lang.model.type.*;
  40 import javax.lang.model.util.*;
  41 
  42 import static javax.lang.model.util.ElementFilter.*;
  43 
  44 public class OverridesSpecEx extends JavacTestingAbstractProcessor {
  45     public boolean process(Set<? extends TypeElement> annoTypes,
  46                            RoundEnvironment round) {
  47         if (!round.processingOver())
  48             doit(annoTypes, round);
  49         return true;
  50     }
  51 
  52     private void doit(Set<? extends TypeElement> annoTypes,
  53                       RoundEnvironment round) {
  54         TypeElement string = elements.getTypeElement("java.lang.String");
  55         TypeElement object = elements.getTypeElement("java.lang.Object");
  56 
  57         ExecutableElement m1 = null;
  58         ExecutableElement m2 = null;
  59         for (ExecutableElement m : methodsIn(string.getEnclosedElements())) {
  60             if (m.getSimpleName().contentEquals("hashCode")) {
  61                 m1 = m;
  62                 break;
  63             }
  64         }
  65         for (ExecutableElement m : methodsIn(object.getEnclosedElements())) {
  66             if (m.getSimpleName().contentEquals("hashCode")) {
  67                 m2 = m;
  68                 break;
  69             }
  70         }
  71 
  72         boolean res =
  73             elements.overrides(m1, m2, (TypeElement) m1.getEnclosingElement());
  74         System.out.println("String.hashCode overrides Object.hashCode?  " + res);
  75         checkResult(res);
  76 
  77         TypeElement a = elements.getTypeElement("OverridesSpecEx.A");
  78         TypeElement b = elements.getTypeElement("OverridesSpecEx.B");
  79         TypeElement c = elements.getTypeElement("OverridesSpecEx.C");
  80 
  81         m1 = null;
  82         m2 = null;
  83         for (ExecutableElement m : methodsIn(a.getEnclosedElements()))
  84             m1 = m;
  85         for (ExecutableElement m : methodsIn(b.getEnclosedElements()))
  86             m2 = m;
  87 
  88         res = elements.overrides(m1, m2, a);
  89         System.out.println("A.m overrides B.m in B?  " + res);
  90         checkResult(!res);
  91         res = elements.overrides(m1, m2, c);
  92         System.out.println("A.m overrides B.m in C?  " + res);
  93         checkResult(res);
  94     }
  95 
  96     private static void checkResult(boolean truthiness) {
  97         if (!truthiness)
  98             throw new AssertionError("Bogus result");
  99     }
 100 
 101     // Fodder for the processor
 102     class A {
 103         public void m() {}
 104     }
 105     interface B {
 106         void m();
 107     }
 108     class C extends A implements B {
 109     }
 110 }