org.primefaces.component.datatable.DataTable cannot be cast to MyEntity - jsf

Question

I'm experimenting with DataTable - Cell Editing as shown in PrimeFaces showcase and I want to save the modified object
the method onCellEdit is definied as follows:
public void onCellEdit(CellEditEvent event) {
Object oldValue = event.getOldValue();
Object newValue = event.getNewValue();
Matpilotaccess mpltiacc = (Matpilotaccess)event.getSource();
articleDAO.Updatetable(mpltiacc);
//event.getSource();
System.out.println("///////////////////////"+event.getOldValue());
System.out.println("///////////////////////"+event.getNewValue());
}
the Matpilotaccess class is definied as follows:
#Entity
#Table(name="matpilotaccess")
public class Matpilotaccess implements Serializable{
private static final long serialVersionUID = 1L;
#Id
#Column(name="idmatpilotaccess1")
private int idmatpilotaccess1;
#Column(name="serie")
private String serie;
#Column(name="cap")
private int cap;
#Column(name="cal")
private String cal;
#Column(name="classe")
private int classe;
#Column(name="unite")
private String unite;
#Column(name="puhtva")
private float puhtva;
#Column(name="puttc")
private float puttc;
#Column(name="quantite")
private float quantite;
#Column(name="monthtva")
private float monthtva;
#Column(name="montttc")
private float montttc;
public Matpilotaccess1(int idmatpilotaccess1, String serie, int cap,
String cal, int classe, String unite, float puhtva, float puttc,
float quantite, float monthtva, float montttc) {
super();
this.idmatpilotaccess1 = idmatpilotaccess1;
this.serie = serie;
this.cap = cap;
this.cal = cal;
this.classe = classe;
this.unite = unite;
this.puhtva = puhtva;
this.puttc = puttc;
this.quantite = quantite;
this.monthtva = monthtva;
this.montttc = montttc;
}
public Matpilotaccess1() {
super();
}
//getters and setters
}
and the following exception is thrown:
org.primefaces.component.datatable.DataTable cannot be cast to com.pfe.model.Matpilotaccess
How can I proceed to cast primefacesDatatable to Matpilotaccess (My entity)?

Answer 1

"Replacing the old object by the modified one" means updating an Entity object not updating the whole entities (datatable), so this should be enough :
public void onCellEdit(CellEditEvent event) {
...
FacesContext context = FacesContext.getCurrentInstance();
Matpilotaccess mpltiacc = context.getApplication().evaluateExpressionGet(context, "#{mpltiacc}", Matpilotaccess.class);
articleDAO.Updatetable(mpltiacc);
...
}