Well, Microsoft Office has Excel, which is a good spreadsheet. Does
ibatis has a mechanism that allows me to do what I want to do?
If intented use for objectwrapper was scala, why didn't you call it
scalaobjectwrapper? Obviously you had other potential uses in mind.
BTW, can you point me to some scala examples? Can ibatis map java
lists and maps to scala lists and maps?
Thanks,
-- Alex
Sent from my mobile
On Feb 24, 2010, at 6:35 PM, Clinton Begin <clinton.be...@gmail.com>
wrote:
What you're trying to do with ObjectWrapper is beyond its intended
use. It was never a consideration nor an intention for the
ObjectWrapper to instantiate objects. ObjectWrapper was originally
implemented to support Scala types, and perhaps to support a custom
property naming convention or some other type (e.g. XML).
It was not intended to change or intercept the result object
lifecycle or override the result object entirely.
You can call it a design problem if you like. But it's kind of like
saying Microsoft Word has a design problem because it isn't a very
good spreadsheet.
Clinton
On Wed, Feb 24, 2010 at 11:11 AM, Alexei Sokolov <alexei.soko...@gmail.com
> wrote:
Hello everyone,
I'm new here, but either I don't understand ibatis internals or you
have a design problem. First, let me share my understanding of how
ibatis handles mapping of result sets to beans:
In *ResultSetHandler.getRowValue() method you create object instance
using objectfactory. then you create metaobject for it, which in
turn creates objectwrapper for that object instance. Then you use
meta object methods to populate property values on that object
instance. During this process both metaobject and objectwrapper
essentially write values directly to the object instance returned
from object factory.
Now, consider this scenario: let's say my object wrapper constructs
intermediate object first and populates its values. Than when I'm
done processing a row, I want to create actual object instance that
will be returned to the client. How do I do this with the current
implementation? Ideally, it will be nice if ObjectWrapper had a
method, say 'getPopulatedInstance()' and then line 179 in
FastResultSetHandler.getRowValue() (and other such places) could be
rewritten like
resultObject = foundValues ? metaObject.getObjectWrapper
().getPopulatedInstance() : null;
instead of
resultObject = foundValues ? resultObject : null;
In other words, it would be nice if objectwrapper is able to create
new instances in addition to being able to work as decorator.
Does it make sense at all?
Thanks,
Alex
