Validating custom control

Furthermore, normal controls are oblivious to the concrete data they display; they just depend on the type, e.g., String or Boolean.

By combining controls and arranging them in layout elements, a complete view can be designed.

Here’s the syntax for the So until now, this means that if everything is working perfectly, we’ll return no errors.

Validator instances come with a ‘default’ provider setup automatically. This makes it simple to use the methods on that class as validation rules.The second is a context array containing data related to the validation process: .Using one of these values will make the rule apply to only create or update operations.Some of the validation methods accept additional parameters to define boundary conditions or valid options.EMF Forms provides standard controls for every type of attribute or reference.