1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   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     8034933
  27  * @summary Elements hides does not work correctly with interface methods
  28  * @library /tools/javac/lib
  29  * @modules java.compiler
  30  *          jdk.compiler
  31  * @build   JavacTestingAbstractProcessor Hides
  32  * @compile -processor Hides -proc:only C.java I.java
  33  */
  34 
  35 import java.util.Set;
  36 import java.util.List;
  37 import javax.annotation.processing.*;
  38 import javax.lang.model.element.*;
  39 
  40 import static javax.lang.model.util.ElementFilter.*;
  41 
  42 public class Hides extends JavacTestingAbstractProcessor {
  43 
  44     VariableElement getField(TypeElement te) {
  45         List<VariableElement> fields = fieldsIn(te.getEnclosedElements());
  46         if (fields.size() != 1) {
  47             throw new AssertionError("Expected only one field in: " + te);
  48         }
  49         return fields.get(0);
  50     }
  51 
  52     ExecutableElement getMethod(TypeElement te) {
  53         List<ExecutableElement> methods = methodsIn(te.getEnclosedElements());
  54         if (methods.size() != 1) {
  55             throw new AssertionError("Expected only one method in: " + te);
  56         }
  57         return methods.get(0);
  58     }
  59 
  60     TypeElement getIC(TypeElement te) {
  61         List<TypeElement> ics = typesIn(te.getEnclosedElements());
  62         if (ics.size() != 1) {
  63             throw new AssertionError("Expected only one inner class in: " + te);
  64         }
  65         return ics.get(0);
  66     }
  67 
  68     public boolean process(Set<? extends TypeElement> tes,
  69                            RoundEnvironment round) {
  70         if (round.processingOver())
  71             return true;
  72 
  73         TypeElement klass = null;
  74         TypeElement intfc = null;
  75 
  76         for (TypeElement te : typesIn(round.getRootElements())) {
  77             switch (te.getKind()) {
  78                 case INTERFACE:
  79                     intfc = te;
  80                     break;
  81                 case CLASS:
  82                     klass = te;
  83                     break;
  84                 default:
  85                     throw new AssertionError("don't know what this is: " + te);
  86             }
  87         }
  88 
  89         for (Element e : klass.getEnclosedElements()) {
  90             switch (e.getKind()) {
  91                 case FIELD:
  92                     check(e, getField(intfc));
  93                     break;
  94                 case METHOD:
  95                     check(e, getMethod(intfc));
  96                     break;
  97                 case CLASS:
  98                     check(e, getIC(intfc));
  99                 default:
 100                     break;
 101             }
 102         }
 103         
 104         if (!status)
 105             throw new Error("Test fails");
 106         return true;
 107     }
 108     boolean status = true;
 109 
 110     String getFQN(Element e) {
 111         return e.getEnclosingElement() + "." + e;
 112     }
 113 
 114     void check(Element e1, Element e2) {
 115         if (eltUtils.hides(e1, e2)) {
 116             System.err.println("Pass: " + getFQN(e1) + " hides: " + getFQN(e2));
 117         } else {
 118             System.err.println("Fail: Expected: " + getFQN(e1) + " to hide: " + getFQN(e2));
 119             status = false;
 120         }
 121     }
 122 }