I don't know I'd include the paging in the data model, the way I see it
(not saying I'm necessarily right), this logic belongs in the view. I
also think you need to add some sort of meta-data there - specifically the
number, name, and types of columns.
I'd still go back to the swing TableModel which translated would give us
something like:
/**
* The number of columns in the model.
*/
int getColumnCount();
/**
* The name of the column at columnIndex.
*/
String getColumnName(int columnIndex);
/**
* The number of rows in the model.
*/
int getRowCount();
/**
* A subset (page) of the data.
*/
TableModel getView(int startRow, int endRow);
Do you see where I'm going? The displaytag control is still responsible
for deciding which page we're currently viewing....
cheers
dim
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
[EMAIL PROTECTED]
Sent: Tuesday, 31 August 2004 11:34 PM
To: [EMAIL PROTECTED]
Subject: Re: [displaytag-devel] branch for 1.1 in CVS
Seems like we are getting even more abstract. I hope we don't over
abstract the code.
Here is my best guess for an interface
getSize() // Total # of elements in collection. The way you retrieve this
may differ depending on your data source.
getStartIndex() // Get the Current Start Index
setEndIndex() // Get the Current End Index
setSetSize() // Set the Number of elements on a page
getSetSize() // get the Number of elements on a page
getNumberOfPages() // get Total Number of Pages given the size of the
collection and the start and end index.
setNumberOfPages() // set The Total Number of Pages and adjust the SetSize
and start and end Index.
retrieveCurrentCollectionSubset() // Retrieve the subset of the
Collect given the current Start and End Index. You can implement
this anyway you want given your data source.
Given this interface you can implement whatever data source you want.
We could probably create and implementation for a Database using
DatabaseMetaData and since maybe even create an impl that just accepts an
XQuery and paginates accordingly.
On Tue, 31 Aug 2004 17:27:23 +1000, [EMAIL PROTECTED]
<[EMAIL PROTECTED]> wrote:
> > You can do this without a data model. Just let the user specify
> > any table and use DatabaseMetaData to retrieve the columns.
>
> My query isn't coming directly from a database. It's (a) on another
> tier, and (b) the result of an XQuery, so unfortunately that doesn't
> do the job for my purposes.
>
> cheers
> dim
>
>
>
>
> On Mon, 30 Aug 2004 10:27:39 +1000, [EMAIL PROTECTED]
> <[EMAIL PROTECTED]> wrote:
> > > To me the most important change will be the re-factoring to allow
> > > database loading (using paging and sorting). And I won't like to
> > > see any JDBC or any ORM-tool code for this. Just an interface that
> > > has to be implemented and linked.
> >
> > I'm not sure how you're thinking of doing this, but I'd also like to
> > see the data model abstracted in a similar fashion to the way the
> > swing table model is. This would make dynamic lists simpler to
> implement imo.
> >
> > cheers
> > dim
> >
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