[jboss-jira] [JBoss JIRA] Updated: (JASSIST-127) interface proxy creation fails if there are methods with covariant return types

[Paul Pogonyshev (JIRA)]

     [ https://issues.jboss.org/browse/JASSIST-127?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Paul Pogonyshev updated JASSIST-127:
------------------------------------

    Attachment: jassist-127-fix.diff


I finally got around to writing a proper fix for this.  There are comments in the patch to explain it.

Unfortunately, to test the bug you need Java 1.5, therefore I disabled the added test.  If you want to test it, make sure "1.4" strings are replaced with "1.5" in 'pom.xml' file.  I did this to make sure that the changes in 'ProxyFactory.java' indeed solve the bug.

> interface proxy creation fails if there are methods with covariant return types
> -------------------------------------------------------------------------------
>
>                 Key: JASSIST-127
>                 URL: https://issues.jboss.org/browse/JASSIST-127
>             Project: Javassist
>          Issue Type: Bug
>    Affects Versions: 3.12.0.GA
>         Environment: Java 1.6.
>            Reporter: Paul Pogonyshev
>            Assignee: Shigeru Chiba
>         Attachments: jassist-127-fix.diff
>
>
> Creation of proxy class for interface Bar fails:
>     public interface Foo
>     {
>         Foo getSelf ();
>     }
>     public interface Bar extends Foo
>     {
>         Bar getSelf ();
>     }
> This is because of covariant return types of method getSelf().  However, as this is permitted by the language (i.e. subtype can restrict the return type further), I consider this a bug.

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