I only need to work with :
datatable.setRowIndex (5);
datatable.getRowData();
when I want to extend the component ?
Thanks for your time passed ro responding :)
Cagatay Civici wrote:
> Hi,
>
> As Cosma explained before, all the control is done using a datamodel,
> even if you bind a list object as the value of a uidata, it is wrapped
> as a ListDataModel object. For example when you call
>
> datatable.setRowIndex (5);
> datatable.getRowData();
>
> At UIData, it leads to
>
> getDataModel().setRowIndex(5);
> getDataModel().getRowData();
>
> At DataModel it finally refers to;
>
> setRowIndex(5); // sets row index
> getRowData(); //finally returns list.get(rowIndex);
>
> Cagatay
>
>
>
> On 7/4/06, *Alexandre Jaquet* <[EMAIL PROTECTED]
> <mailto:[EMAIL PROTECTED]>> wrote:
>
> Well Cosma first thanks for your explanation, if I understand
> well, all
> components have to extend UIData and we can set to every
components a
> dataModel?
>
>
> Cosma Colanicchia wrote:
> > Hi Alexandre,
> >
> > it's simple, JSF defines a DataModel class that is used by
UIData
> > componentes (like the data table). Note that it is allowed the
> usage
> > of some other types (for example java.util.List) because
DataModel
> > implementations that wraps it are available automatically
picked.
> >
> > Basically, the datatable will initially ask your DataModel size
> using
> > getDatasetSize(), then ask rows as need one by one calling:
> >
> > - isRowAvailable(index) to see if a particular index maps to an
> actual
> > row
> > - setRowIndex(index) to make that index current
> > - getRowData() to get the object with the data of the current
> row index
> >
> > So, if you need more control, you can implement your DataModel
> object
> > (extending the JSF base class) and specify it as the datatable's
> value
> > attribute.
> >
> > This way you can, for example, implement the getDatasetSize()
> doing a
> > SELECT COUNT on the database and query the db only for a
limited set
> > of rows in getRowData(), instead of loading an entire table in
> memory
> > when creating the view.
> >
> >
> > Hope this helps
> > Cosma
> >
> > 2006/7/4, Alexandre Jaquet <[EMAIL PROTECTED]
> <mailto:[EMAIL PROTECTED]>>:
> >> Hi,
> >>
> >> I want to understand how work DataTable any good documentation
> ? I want
> >> to understand the cars-demo example :
> >> http://wiki.apache.org/myfaces/WorkingWithLargeTables
> <http://wiki.apache.org/myfaces/WorkingWithLargeTables>
> >>
> >> regards
> >>
> >
>
>
