On Fri, 02 Sep 2005 18:04:31 -0400, Gili <[EMAIL PROTECTED]> wrote:
What is the reason? The new method sounds very anti-OOP to me. Usually
one layers functionality using interfaces. Stuffing them all into the
base class but having them throw exceptions when "disabled" sounds a lot
like a flat object model to me.
The reason for unifying them in one base class is also to make the
inheritance hierarchy smaller, less deep and more consistent. If you split
DataView and PageableDataView than you also have to make a GridDataView
and a PageableGridDataView. Two classes which are from the hierarchy total
unreleated but are otherwise more or less the same.
Further if you look at the old code of DataView and PagabeableDataView the
PageableDataView is not easy to understand, because you have to consider
two classes with all the protected and overriding co-work. A general
problem with inheritance, which gets worse the deeper the hierarchy is.
And last but most important the user has to learn two classes where there
always remains some uncertainty wheter the child-class does indeed behave
like the super class, because it could always override some methods (as it
currently does).
So I am realy for merging them in one class.
Christian
Gili
Johan Compagner wrote:
that is something we had.. and want to get rid of i think..
johan
Gili wrote:
Igor Vaynberg wrote:
Yes the support delegate is lazily created. Setcurrentpage() throws
illegalstateexception if paging is disabled.
Sounds like an anti-pattern to me. Why don't you have a base class
without Pagable support and a subclass that is Pagable (always) with
these methods.
Gili
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