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https://issues.apache.org/jira/browse/DERBY-5868?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Knut Anders Hatlen updated DERBY-5868:
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Issue & fix info: Patch Available
Derbyall and suites.All passed on Java 5, 6 and 7 with the patch.
> Move java.sql.Wrapper implementations to base classes on the client
> -------------------------------------------------------------------
>
> Key: DERBY-5868
> URL: https://issues.apache.org/jira/browse/DERBY-5868
> Project: Derby
> Issue Type: Improvement
> Components: JDBC
> Affects Versions: 10.10.0.0
> Reporter: Knut Anders Hatlen
> Assignee: Knut Anders Hatlen
> Attachments: derby-5868-1a.patch
>
>
> The client classes that implement java.sql.Wrapper, implement the interface
> in the leaf classes instead of the base classes. This is because unwrap() has
> a generic signature, so it could not be in the base classes as long as they
> had to be compatible with Java 1.4.
> For example, in the statement class hierarchy, we implement unwrap() in
> Statement40, PreparedStatement40 and CallableStatement40. Now that we compile
> the client with source level 1.5, we can move the unwrap() method to the
> Statement class and eliminate the duplication.
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