This annotation may be applied to a class or to a field to
customize the data binding process.
When the annotation is applied to a field, the value assigned to the
annotation should be a Closure which accepts 2 parameters. The first
parameter is the object that data binding is being applied to. The second
parameter is a
org.grails.databinding.DataBindingSource containing the values being bound to the object.
The value returned by the Closure will be bound to the field. The
following code demonstrates using this technique to bind an upper
case version of the value in the DataBindingSource to the field.
class SomeClass {
@BindUsing({
obj, source -> source['name']?.toUpperCase()
})
String name
}
When the annotation is applied to a class, the value assigned to the
annotation should be a class which implements the
BindingHelper
interface. An instance of that class will be used any time a value
is bound to a property in the class that this annotation has been
applied to.
@BindUsing(SomeClassWhichImplementsBindingHelper)
class SomeClass {
String someProperty
Integer someOtherProperty
}