extendedDataTable : storing column visibility in database

[gonzalad]

Hello,

I need to store user preferences in database.

Such preferences include extendedDataTable column visibility and column grouping.

When the user toggles column visibility or grouping, I want to update its database preferences.

I use RF 3.3.3.

I've tried usingthe tableState attribute of extendedDatatable, but it is only a JSON String, so i would need to parse it.

Is there an easy way to :

• get the tableState as an easy to maniulate object ?
• add a server listener which will be called whenever column visibility or grouping is changed ?

Thanks !

P.S.

just using rich:extendedDataTable binding attribute and calling ExtendedDataTableState.getExtendedDataTableState(getExtendedDataTable()) appears to solve the first question, but it seems to me quite counter intuitive. Shouldn't tableState just give an instance of ExtendedDataTableState instead of a String ?

Sample code :

Programmatically toggling column (just make sure myAction is always called - i.e. using a seam page action) :

{code}
public void myAction() {
    ExtendedDataTableState lState = getExtendedDataTableState();
    // test : verify c3 column is always hidden
    if (lState.isColumnVisible("c3")) {
            lState.toggleColumnVisibility(getExtendedDataTable(), "c3");
    }
    ...
}
private ExtendedDataTableState getExtendedDataTableState() {
          return getChargeClienteleDataTableState().getExtendedDataTableStateObject();
}
private UIExtendedDataTable getExtendedDataTable() {
          return getChargeClienteleDataTableState().getExtendedDataTable();
}
private ChargeClienteleDataTableState getChargeClienteleDataTableState() {
          return (ChargeClienteleDataTableState) Component.getInstance("chargeClienteleDataTableState");
}
{code}

Getting access to ExtendedDataTableState :

{code}
@Name("chargeClienteleDataTableState")
@Scope(ScopeType.EVENT)
public class ChargeClienteleDataTableState {
          private ExtendedDataTableState extendedDataTableObject;
          private UIExtendedDataTable extendedDataTable;
          public UIExtendedDataTable getExtendedDataTable() {
                    return extendedDataTable;
          }
          public void setExtendedDataTable(UIExtendedDataTable extendedDataTable) {
                    this.extendedDataTable = extendedDataTable;
          }
          public ExtendedDataTableState getExtendedDataTableStateObject() {
                    if (extendedDataTableObject==null) {
                              extendedDataTableObject = ExtendedDataTableState.getExtendedDataTableState(getExtendedDataTable());
                    }
                    return extendedDataTableObject;
          }
}
{code}

JSF code :

{code:xml}
<rich:extendedDataTable var="chargeClientele" value="#{rechercherChargeClienteleAction.dataModel}"
    binding="#{chargeClienteleDataTableState.extendedDataTable}"> 
          <rich:column id="c1" label="#{messages['chargeClientele.nom.label']}">
                    #{chargeClientele.nom}
          </rich:column>
          <rich:column id="c2" label="#{messages['chargeClientele.prenom.label']}">
                    #{chargeClientele.prenom}
          </rich:column>
          <rich:column id="c3" label="#{messages['chargeClientele.userRACF.label']}">
                    #{chargeClientele.userRACF}
          </rich:column>
{code}