Binding TextField to Integer based Property in Grid not working

Vaadin 6 / 7 / 8 Framework Data Binding
1

Hello everyone,
i want to user a grid in Vaadin 8. The constructor of the grid should do the item Binding for every property in the given Model.
If i user the code below, i get the error: “java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String”.
I read multiple articles in google to find a solution for the problem, but no answer worked for me.
Please, can anybody say me how to do the DataBinding ?

Grid:

public DataGrid(OrgModelCollection modelCol, Class c){ // Class which is user here is User (see code below)
super(c);
this.setItems(modelCol);
List properties = this.getModelProperties(c); // The method returns the properties of the model. It’s doing fine.

    for(String prop : properties){
        TextField tf = new TextField();
        if(prop.equals("id")){                          // id is an integer Property in the User class
            Binder<T> binder = new Binder<T>(c);
            binder.forField(tf)
            .withConverter(new StringToBigIntegerConverter("Please insert a number"))
            .bind("id");
            binder.bindInstanceFields(this);
            this.getColumn(prop).setEditorComponent(tf);
        }
    }
    
    this.getEditor().setEnabled(true);
}

User class:

public class User extends OrgModel{

public int id;
public String username;
public String password;

..... Getter and Setter of the properties
2

Hey there, maybe you want to try this approach

for(String prop : properties) {
TextField tf = new TextField();
Binder.Binding<User, ?> binding;
if(prop.equals("id")) {
binding = this.getEditor().getBinder().forField(tf)
.withConverter(new StringToIntegerConverter("Please insert a number"))
.bind(prop);
} else {
binding = this.getEditor().getBinder().forField(tf)
.bind(prop);
}
this.getColumn(prop).setEditorBinding(binding);
}
3

Thank you very much. This solution worked for me.