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https://issues.apache.org/jira/browse/TAP5-1493?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14045967#comment-14045967
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Hudson commented on TAP5-1493:
------------------------------
FAILURE: Integrated in tapestry-trunk-freestyle #1258 (See
[https://builds.apache.org/job/tapestry-trunk-freestyle/1258/])
Shot-in-the-dark attempt to fix TAP5-1493 in Jenkins. (thiagohp: rev
22edd355cbea3894d5fee2eb8c38be1b6d5fd6ae)
*
tapestry-ioc/src/main/java/org/apache/tapestry5/ioc/internal/services/ClassPropertyAdapterImpl.java
> Property expressions on properties that are covariant on a base class use the
> type of the base class property, not the covariant subclass
> -----------------------------------------------------------------------------------------------------------------------------------------
>
> Key: TAP5-1493
> URL: https://issues.apache.org/jira/browse/TAP5-1493
> Project: Tapestry 5
> Issue Type: Bug
> Components: tapestry-core, tapestry-ioc
> Affects Versions: 5.2
> Reporter: Howard M. Lewis Ship
> Priority: Critical
> Labels: month-of-tapestry
> Fix For: 5.4
>
>
> public abstract class AbstractFoo
> {
> public abstract AbstractBar getBar();
> }
> public class Foo extends AbstractFoo
> {
> public Bar getBar();
> }
> Here property bar is covariant; the subclass (Foo) changes the type of the
> return value (from AbstractBar to just Bar). Assuming that Bar is a subclass
> of AbstractBar, that's fine.
> The bug is that in this circumstance, the PropertyConduitSource sees the type
> of
> property "bar" of class Foo as AbstractBar, not Bar.
> Interestingly, a little debugging showed that the getter method for property
> bar was "public AbstractBar Foo.getBar()" ... in other words, much like with
> Generics, covariant return types may be largely
> a fiction of the compiler inserting the necessary casts in place.
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