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Posted to derby-dev@db.apache.org by "Knut Anders Hatlen (JIRA)" <ji...@apache.org> on 2012/08/13 14:56:38 UTC
[jira] [Closed] (DERBY-5883) Simplify JSR-169 implementation class
tree
[ https://issues.apache.org/jira/browse/DERBY-5883?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Knut Anders Hatlen closed DERBY-5883.
-------------------------------------
Resolution: Fixed
Fix Version/s: 10.10.0.0
Issue & fix info: (was: Patch Available)
Committed revision 1372404.
> Simplify JSR-169 implementation class tree
> ------------------------------------------
>
> Key: DERBY-5883
> URL: https://issues.apache.org/jira/browse/DERBY-5883
> Project: Derby
> Issue Type: Improvement
> Components: JDBC
> Affects Versions: 10.10.0.0
> Reporter: Knut Anders Hatlen
> Assignee: Knut Anders Hatlen
> Priority: Minor
> Fix For: 10.10.0.0
>
> Attachments: d5883-1a.diff
>
>
> The JSR-169 interface is a subset of JDBC 3.0, but still the JDBC 3.0 implementation classes do not extend the JSR-169 implementation classes. Instead, the JSR-169 and JDBC 3.0 implementation classes extend a common base class. The reason for this structure, is that the JSR-169 compile targets used to be optional, so the JDBC 3.0 classes could not depend on them.
> For example, the class javadoc comment for EmbedResultSet169 says:
> * ResultSet implementation for JSR169.
> * Adds no functionality to its (abstract) parent class.
> * If Derby could be compiled against JSR169 that the parent
> * class could be the concrete class for the environment.
> * Just like for the JDBC 2.0 specific classes.
> * Until that is possible (ie. easily downloadable J2ME/CDC/Foundation/JSR169
> * jar files, this class is required and is only compiled by an optional target.
> Since the JSR-169 code is no longer optional, we should do as the comment suggests, and use the base class directly instead. This would allow us to simplify the class tree.
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