Alexandre, can you specify some more details about what you're trying to do?
Cosma 2006/7/4, Alexandre Jaquet <[EMAIL PROTECTED]>:
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 > >> > > > >
