Well, okay, that makes the discussion a bit more abstract ;-). I understand your
point, but the bottom line is that it's just a namespace (package) and an
external library (JAR file). To my mind, the real question with either Result or
RowSetDynaClass is how far from the data layer do you want the column names to
propagate? In some cases that may be all the way to the view layer.
Quoting David Graham <[EMAIL PROTECTED]>:
> --- Kris Schneider <[EMAIL PROTECTED]> wrote:
> > I'll admit that using a package called javax.servlet.jsp.jstl.sql in a
> > non-Web app is a bit odd, but I'm not seeing any dependencies on other
> > javax.servlet classes or interfaces or a Web container. I haven't tried
> > it, but I'd bet the examples below would work outside a Web app.
>
> Maybe, but it just feels wrong. I know I've made a mistake when something
> in the app doesn't feel right.
>
> David
>
> > Worth a try sometime...
> >
> > David Graham wrote:
> > > That's certainly another option but keep in mind that it ties your app
> > to
> > > the web. That may be ok if you don't plan on reusing any of the code
> > from
> > > the app but DynaBeans are more appropriate for building layers that
> > are
> > > reusable in any environment.
> > >
> > > David
> > >
> > > --- Kris Schneider <[EMAIL PROTECTED]> wrote:
> > >
> > >>Another datapoint: JSTL provides an interface called
> > >>javax.servlet.jsp.jstl.sql.Result:
> > >>
> > >>public interface Result {
> > >> public SortedMap[] getRows();
> > >> public Object[][] getRowsByIndex();
> > >> public String[] getColumnNames();
> > >> public int getRowCount();
> > >> public boolean isLimitedByMaxRows();
> > >>}
> > >>
> > >>and a utility class javax.servlet.jsp.jstl.sql.ResultSupport:
> > >>
> > >>public class ResultSupport {
> > >> public static Result toResult(ResultSet rs);
> > >> public static Result toResult(ResultSet rs, int maxRows);
> > >>}
> > >>
> > >>to accomplish something similar. The SortedMap instances returned from
> >
> > >>Result.getRows are keyed by the ResultSet's column names and use the
> > >>Comparator String.CASE_INSENSITIVE_ORDER so that you don't have to
> > worry
> > >>
> > >>about matching the case of the column name exactly. So, depending on
> > >>what your preference is, you can just do:
> > >>
> > >>ResultSet rs = ...;
> > >>Result result = ResultSupport.toResult(rs);
> > >>request.setAttribute(MyConstants.RESULT, result);
> > >>
> > >>or:
> > >>
> > >>ResultSet rs = ...;
> > >>Result result = ResultSupport.toResult(rs);
> > >>Map[] rows = result.getRows();
> > >>request.setAttribute(MyConstants.ROWS, rows);
> > >>
> > >>David Graham wrote:
> > >>
> > >>>--- Richard Hill <[EMAIL PROTECTED]> wrote:
> > >>>
> > >>>
> > >>>>Hi,
> > >>>>I'm working on an action that gets a resultset from a database table
> > >>>>containing 4 columns. I need to pass that information back to the
> > view
> > >>>>(jsp)
> > >>>>which will iterate over results. My question is what is the best way
> > >>
> > >>to
> > >>
> > >>>>do
> > >>>>this. Do I create an array for each row in the resultset and insert
> > >>
> > >>each
> > >>
> > >>>>array in a collection, passing that back to the view?
> > >>>
> > >>>
> > >>>A fairly standard approach is to create a class that represents a row
> > >>
> > >>of
> > >>
> > >>>your ResultSet and store a List of those objects in the request for
> > >>
> > >>the
> > >>
> > >>>page to iterate over.
> > >>>
> > >>>If you don't want to create a class for each result, you should check
> > >>
> > >>out
> > >>
> > >>>the BeanUtils DynaBeans. This little gem:
> > >>>
> > >>
> > >
> >
>
http://jakarta.apache.org/commons/beanutils/api/org/apache/commons/beanutils/RowSetDynaClass.html
> > >
> > >>>allows you to transer ResultSet data to DynaBeans in a trivial amount
> > >>
> > >>of
> > >>
> > >>>code.
> > >>>
> > >>>David
> > >>>
> > >>>
> > >>>
> > >>>
> > >>>>If so, how would you iterate over each array in the collection with
> > >>
> > >>the
> > >>
> > >>>>logic:iterate taglib? All of the examples only show iterations over
> > >>>>single
> > >>>>column lists.
> > >>>>
> > >>>>Any help would be appreciated.
> > >>>>
> > >>>>Thanks,
> > >>>>Richard
> > >>
> > >>--
> > >>Kris Schneider <mailto:[EMAIL PROTECTED]>
> > >>D.O.Tech <http://www.dotech.com/>
> >
> > --
> > Kris Schneider <mailto:[EMAIL PROTECTED]>
> > D.O.Tech <http://www.dotech.com/>
--
Kris Schneider <mailto:[EMAIL PROTECTED]>
D.O.Tech <http://www.dotech.com/>
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