JDK-7087658 : MethodHandles.Lookup.findVirtual is confused by interface methods that are multiply inherited
- Type: Bug
- Component: hotspot
- Sub-Component: compiler
- Affected Version: hs23,hs24,7
- Priority: P4
- Status: Closed
- Resolution: Duplicate
- OS: linux
- CPU: x86
- Submitted: 2011-09-07
- Updated: 2013-11-12
- Resolved: 2013-07-17
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To download the current JDK release, click here.
| JDK 7 | JDK 8 |
|---|---|
7u40Fixed  |
8Resolved |
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Description
Given this test case:
interface A {
Iterable m(List<String> ls);
}
interface B {
Iterable<String> m(List l);
}
interface AB extends A, B { }
interface AA extends A { }
If I do:
MethodHandle mh1 = MethodHandles.lookup().findVirtual(A.class, "m", MethodType.methodType(Iterable.class, List.class));
MethodHandle mh2 = MethodHandles.lookup().findVirtual(B.class, "m", MethodType.methodType(Iterable.class, List.class));
MethodHandle mh3 = MethodHandles.lookup().findVirtual(AB.class, "m", MethodType.methodType(Iterable.class, List.class));
MethodHandle mh4 = MethodHandles.lookup().findVirtual(AA.class, "m", MethodType.methodType(Iterable.class, List.class));
I would expect all the lookups to succeed. However, only lookups for A, B, and AA succeed; lookups for AB fail with
java.lang.NoSuchMethodException: no such method: AB.m(List)Iterable
It fails the same way when the generics are removed. So it appears to be a problem with an interface multiply inheriting the same method and not overriding it.
Comments
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