Binding BigDecimal fields to a BeanFieldGroup TextField?

Vaadin 6 / 7 / 8 Framework Data Binding
1

Hi,

how can I bind a BigDecimal member variable to a TextField that is created in a BeanFieldGroup?


class MyBean {
	BigDecimal amount;
}


BeanFieldGroup binder = new BeanFieldGroup<MyBean>(MyBean.class);
binder.buildAndBind("Amount:", "amount");
TextField amount = (TextField) binder.getField("amount");
//how can I tell the amount field that it should be of type BigDecimal.cass?

I tried to use this one:


table.addContainerProperty("amount", BigDecimal.class, null, "Amount (USD)", null, null);

But this gives me an error:


Caused by: com.vaadin.data.Validator$InvalidValueException: Could not convert value to Number

BUT how can I set such a property when using binder?

2

I have the same problem here …
is it a bug ??
greatings bernhard

ps: yes i do setNullRepresentation(“”) for the field

3

Which Vaadin version are you using?

There was a problem with this at least with 7.0, and in 7.1 there is no generic StringToNumberConverter, but at least it should be easy to write your own StringToBigDecimalConverter as a subclass of AbstractStringToNumberConverter and set it explicitly or use a custom ConverterFactory (see the javadoc of DefaultConverterFactory).

4

Actually, StringToNumberConverter still exists in 7.1 (it’s removed in 7.2). It’s broken, however, along with DefaultFieldFactory which returns instances of StringToNumberConverter for any Number subclasses that don’t have a specific converter - even though it can’t possibly handle most of them. Please see
ticket #12225
.

StringToBigDecimalConverter will be added in 7.2; in the meantime, you’ll have to implement your own, like Henri said.