update bean table vaadin 6.4.9

Vaadin 6 / 7 / 8 Framework Data Binding
1

Hello:

I try to update the data in a table by the following


@Override
	public void valueChange(com.vaadin.data.Property.ValueChangeEvent event) {
			Item item = this.getItem(this.getValue());
			item.getItemProperty("non").setValue("new nonf");

	}

and shows me the following error


	at com.gendarmeria.inventarioinformatico.vista.dispositivo.TablaDispositivo.valueChange(TablaDispositivo.java:295)
	at com.vaadin.data.util.MethodProperty.fireValueChange(MethodProperty.java:958)
	at com.vaadin.data.util.MethodProperty.setValue(MethodProperty.java:722)
	at com.gendarmeria.inventarioinformatico.vista.dispositivo.TablaDispositivo.valueChange(TablaDispositivo.java:295)
	at com.vaadin.data.util.MethodProperty.fireValueChange(MethodProperty.java:958)
	at com.vaadin.data.util.MethodProperty.setValue(MethodProperty.java:722)
	at com.gendarmeria.inventarioinformatico.vista.dispositivo.TablaDispositivo.valueChange(TablaDispositivo.java:295)
	at com.vaadin.data.util.MethodProperty.fireValueChange(MethodProperty.java:958)
	at com.vaadin.data.util.MethodProperty.setValue(MethodProperty.java:722)
	at com.gendarmeria.inventarioinformatico.vista.dispositivo.TablaDispositivo.valueChange(TablaDispositivo.java:295)
	at com.vaadin.data.util.MethodProperty.fireValueChange(MethodProperty.java:958)
	at com.vaadin.data.util.MethodProperty.setValue(MethodProperty.java:722)
	at com.gendarmeria.inventarioinformatico.vista.dispositivo.TablaDispositivo.valueChange(TablaDispositivo.java:295)
	at com.vaadin.data.util.MethodProperty.fireValueChange(MethodProperty.java:958)
	at com.vaadin.data.util.MethodProperty.setValue(MethodProperty.java:722)
	at com.gendarmeria.inventarioinformatico.vista.dispositivo.TablaDispositivo.valueChange(TablaDispositivo.java:295)
	at com.vaadin.data.util.MethodProperty.fireValueChange(MethodProperty.java:958)
	at com.vaadin.data.util.MethodProperty.setValue(MethodProperty.java:722)
	at 
.....

:(:(:(:(:(:frowning: because it updates the row in the table???
java 6 windows 7

2

Yes, the setValue you are doing will trigger the change event.

The cleanest way to do this is to compare the current value with the new value. If the current value is already what you want, don’t do the setValue.

3

I want to change the value of the row I have the following


public void valueChanged (com.vaadin.data.Property.ValueChangeEvent event) {
Item item = this.getItem (this.getValue ());
Property p = item.getItemProperty ("mark");
if (p! = null) {
                    MarcaTabla String = (String) p.getValue (");// mark this not null
                   }
                 Object obj = new String ("asdfasfsadf");
p.setValue (obj); / null here this

and then change the value??

which is the way to update all the values of the row and need to do
the update manually

4

Can you show a bit more code? What is the object for which you have defined this ValueChangeListener? Is it the table or something else?

I don’t see what causes the loop. Changing a property value for an item shouldn’t trigger ValueChangeEvent for the table’s property value, which just indicates the current selection.