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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 
getField(TypeElement te)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 
getMethod(TypeElement te)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 
getIC(TypeElement te)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 
process(Set<? extends TypeElement> tes, RoundEnvironment round)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 
getFQN(Element e)110     String getFQN(Element e) {
111         return e.getEnclosingElement() + "." + e;
112     }
113 
check(Element e1, Element e2)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 }
123