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https://issues.apache.org/jira/browse/TAP5-1493?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14046098#comment-14046098
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ASF subversion and git services commented on TAP5-1493:
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Commit 4400d5dd305eb29e3c381573df2d15d8c7c999e5 in tapestry-5's branch
refs/heads/master from [~uklance]
[ https://git-wip-us.apache.org/repos/asf?p=tapestry-5.git;h=4400d5d ]
TAP5-1493 - Use non-bridge method for writeMethod and consider parameter count
when substituting
> 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
> Assignee: Thiago H. de Paula Figueiredo
> 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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