Binding embeddable class ?

Vaadin 6 / 7 / 8 Framework Data Binding
1

Hello

I’m looking for a solution to resolve my problem. I have 2 class: Participante and Endereco. The class
Endereco
 is @Embeddable and
Participante
 class use Endereco.
The problem occur when I try bindAndBuild fields of Endereco, one exception is lanced and I don’t know how to problem, because I follow example of vaadin book: [b]
9.4.5. Binding Fields to a Bean

here how I’m trying
[/b]

@Embeddable
public class Endereco {
    
    private String endereco;
    private Integer numero;
    private String complemento;
    private String cidade;
    private String bairro;
    
    @Enumerated(EnumType.STRING)
    private EstadosDoBrasil uf;
    
    private String cep;
    
    public Endereco() {
        super();
    }
   //gets and sets

@Entity
public class Participante implements Serializable{    
    private static final long serialVersionUID = 1L;
    
    @Id @GeneratedValue
    private Long id;
    
    @NotNull @NotEmpty @Size(min=3, max=50) 
    private String nome;
    
    @NotNull @NotEmpty @Size(min=3, max=50)
    private String sobreNome;
    
    private String sexo;
    
    @Temporal(TemporalType.DATE)
    private Date dt_nascimento;
    
    @Temporal(TemporalType.DATE)
    private Date dt_cadastro;
    
    private String naturalidade;

    private Endereco endereco;

    //gets and sets


///my view with bind
BeanFieldGroup binder = new BeanFieldGroup<Participante>(Participante.class);        
        binder.setItemDataSource(new Participante());
        Field<?> field = null;

field = binder.buildAndBind("Cidade:", "endereco.cidade", TextUpper.class);
cidade = (TextUpper)field;
cidade.setWidth("5cm");
cidade.setMaxLength(50);
mainLayout.addComponent(cidade);

//exception
Caused by: com.vaadin.data.fieldgroup.FieldGroup$BindException: Property type for 'endereco.cidade' could not be determined. No property with that id was found.
    at com.vaadin.data.fieldgroup.FieldGroup.getPropertyType(FieldGroup.java:369)
    at com.vaadin.data.fieldgroup.BeanFieldGroup.getPropertyType(BeanFieldGroup.java:42)
    at com.vaadin.data.fieldgroup.FieldGroup.buildAndBind(FieldGroup.java:1037)
    at br.com.webapp.views.ParticipanteForm.bindingFields(ParticipanteForm.java:163)
    at br.com.webapp.views.ParticipanteForm.insert(ParticipanteForm.java:91)
    at br.com.webapp.views.ParticipanteView.buttonClick(ParticipanteView.java:136)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:508)
    ... 40 more

How to I do this ?

2

Hello Fernando,

In order to make your solution work you’ll need to create the field and bind it separately:

cidade = new TextUpper();
binder.bind(cidade, "endereco.cidade");

BeanFieldGroup handles nested fields automatically but the buildAndBind(caption, property, fieldClass) is actually implemented by the superclass (FieldGroup), which then fails to find the nested property.

The same could be achieved with the regular FieldGroup but then you’ll need to manually set the nested properties:

BeanItem item = new BeanItem(new Participante());
FieldGroup binder = new FieldGroup(item);
item.addNestedProperty("endereco.cidade");
field = binder.buildAndBind("Cidade:", "endereco.cidade", TextUpper.class);
3

thanks for your answer.

I solve the problem.

I did

BeanFieldGroup<Participante> binder = new BeanFieldGroup<Participante>(Participante.class);
binder.setItemDataSource(new Participante());
binder.getItemDataSource().addNestedProperty("endereco.cidade");

thanks