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
