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https://issues.apache.org/jira/browse/POLYGENE-251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16010250#comment-16010250
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Niclas Hedhman commented on POLYGENE-251:
-----------------------------------------
I have created a InterfaceDefaultMethodsMixin which handles the MethodHandle
stuff back to the default method in the interface.
I am now at a point where the SideEffect seems to work, but Concerns don't. At
first because the SideEffect implemented the interface WITH the @SideEffects
declaration, whereas the Concern implemented the superinterface, and the two
sayHello() default methods are not type assignable with each other (not sure if
that is a JVM bug or not).
But after putting the implementation same between the SideEffects testcase and
the Concerns testcase, I now get a much worse error, that the MethodHandle
can't do its magic.
It is really strange.
> Support Java 8 default methods on interfaces
> --------------------------------------------
>
> Key: POLYGENE-251
> URL: https://issues.apache.org/jira/browse/POLYGENE-251
> Project: Polygene
> Issue Type: Bug
> Reporter: Paul Merlin
> Assignee: Niclas Hedhman
> Priority: Blocker
> Fix For: 3.0
>
>
> The following composite declaration:
> {code}
> public interface DefaultMethods
> {
> default String sayHello( String name )
> {
> return "Hello, " + name + '!';
> }
> }
> {code}
> fails at assembly with:
> {code}
> Composition Problems Report:
> message: No implementation found for method
> method: String sayHello(String name)
> {code}
> See {{InterfaceDefaultMethodsTest}} in {{core/runtime}}
> Also see POLYGENE-120 for some preliminary investigation.
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