如何将空的 Vaadin TextField 映射到模型属性中的 null 值

问：

Vaadin v24 的默认行为是将空 TextField 映射到空 String 作为模型值。如何将其映射到所有TextFields的null值，而无需将withNullRepresentation添加到每个textField绑定？

我已经制作了自己的 CustomBinder，我想知道这是正确的方法。代码如下：

public class CustomBinder<BEAN> extends Binder<BEAN> {
    private static final long serialVersionUID = 3555096816850091643L;

    public CustomBinder() {
        super();
    }

    public CustomBinder(Class<BEAN> p_beanType, boolean p_scanNestedDefinitions) {
        super(p_beanType, p_scanNestedDefinitions);
    }

    public CustomBinder(PropertySet<BEAN> p_propertySet) {
        super(p_propertySet);
    }

    public CustomBinder(Class<BEAN> p_class) {
        super(p_class);
    }

    @Override
    public <FIELDVALUE> BindingBuilder<BEAN, FIELDVALUE> forField(HasValue<?, FIELDVALUE> p_field) {
        BindingBuilder<BEAN, FIELDVALUE> forFieldBinding = super.forField(p_field);
        if (p_field instanceof TextField || p_field instanceof TextArea) {
            forFieldBinding = forFieldBinding.withNullRepresentation((FIELDVALUE) "");
        }
        return forFieldBinding;
    }
}