[jira] [Commented] (DBUTILS-74) New ListResultSetHandler with a ResultSetHandler as parameter

["Stevo Slavic (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DBUTILS-74?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13408901#comment-13408901 ] 

Stevo Slavic commented on DBUTILS-74:
-------------------------------------

Olivier described solution, but I believe what he really wants (please correct me if wrong) is to have {{ResultSetHandler}} and it's implementations agnostic of whether it will be used to handle a single result or a collection - it just needs to focus on handling single {{ResultSet}} row to single object regardless if that object is a POJO, {{Object}} {{Array}}, or a {{Map}}. In that case {{QueryRunner}}, like JPA's {{Query}}, should have this logic and separate API for retrieving a single result, and separate one for retrieving a collection. IMO this would be major refactoring of the dbutils so it's probably best to schedule it for next major (2.0) release.
                
> New ListResultSetHandler with a ResultSetHandler as parameter
> -------------------------------------------------------------
>
>                 Key: DBUTILS-74
>                 URL: https://issues.apache.org/jira/browse/DBUTILS-74
>             Project: Commons DbUtils
>          Issue Type: Improvement
>    Affects Versions: 1.3
>            Reporter: Olivier Grégoire
>             Fix For: 1.5
>
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> It would be great if we could have such a class:
> public class DefaultListResultSetHandler<T> extends AbstractListHandler<T> {
>   public DefaultListResultSetHandler (ResultSetHandler<T> handler) {
>    if (handler == null) throw new NullPointerException();
>     this.handler = handler;
>   }
>   protected T handleRow (ResultSet rs) {
>     return handler.handle(rs);
>   }
> }
> This way, we avoid having two classes, one for the object handler itself and one for the list handler. It's a all at once.

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