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23 
24 /*
25  * @test
26  * @bug     6346973
27  * @summary directSupertypes(t) should not return t
28  * @author  Scott Seligman
29  * @library /tools/javac/lib
30  * @modules java.compiler
31  *          jdk.compiler
32  * @build   JavacTestingAbstractProcessor DirectSupersOfErr
33  * @compile/fail/ref=DirectSupersOfErr.ref -processor DirectSupersOfErr -proc:only -XDrawDiagnostics C1.java
34  */
35 
36 import java.util.Set;
37 import javax.annotation.processing.*;
38 import javax.lang.model.element.*;
39 import javax.lang.model.type.*;
40 import javax.lang.model.util.*;
41 import static javax.lang.model.util.ElementFilter.*;
42 
43 public class DirectSupersOfErr extends JavacTestingAbstractProcessor {
process(Set<? extends TypeElement> tes, RoundEnvironment round)44     public boolean process(Set<? extends TypeElement> tes,
45                            RoundEnvironment round) {
46         if (round.processingOver()) return true;
47 
48         for (TypeElement te : typesIn(round.getRootElements())) {
49             TypeMirror sup = te.getSuperclass();
50             for (TypeMirror supOfSup : types.directSupertypes(sup)) {
51                 if (sup == supOfSup)
52                     throw new AssertionError("I'm my own supertype.");
53             }
54         }
55         return true;
56     }
57 }
58