BeanFieldGroup : Bean validation for "long" data type

Vaadin 6 / 7 / 8
1

Following is my Bean with field
“age”
 of type
long


public class Person {

	private String name;
	private long age;
	
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public long getAge() {
		return age;
	}
	public void setAge(long age) {
		this.age = age;
	}
}

Now when I use BeanFieldGroup for binding a form to this bean i get following validation error
“Could not convert value to Numnber”
.
Any thoughts about fixing this issue?

2

The “proper” way to do this is to create your own “converter” so Vaadin’s field components can work with it. There’s
a page in the wiki with the details.

If you don’t want to create a converter, maybe you can:

  1. change “private long age” to “private Number age” in the pojo. (might not be feasible if this is coming from a database)
  2. assuming this is a DTO that you can modify, you can add an additional data member with the expected type, and do the conversion in the getter/setter. Then bind the Field components to the new data member instead.
 
public class Person {
    private String name;
    private long age;
    private Number ageInNumber; 
    public Number getAgeInNumber() {
        Number value = ....; // convert age to value
        return value;  
    }
    public void setAgeInNumber(Number value) {
        this.age = ..... //convert value to age 
    }
3

Hi ts chan

Thanks for reply. In my case modifying POJO is not feasible. Looks like custom “converter” could fix this issue

4

This is a bug in Vaadin; please see
ticket #12225
.

5

Thanks Johannes for update