Reacting to model changes

There are multiple ways in NMF how to react to changes in a model:

• The most flexible option is the BubbledChange event. This is propagated by NMF along the composition tree. This means, when subscribing to this event at a given model element, you will not only receive changes of this element but also changes from all model elements underneath. The event data BubbledChangeEventArgs reports on the affected element, the feature and the original event data which you can use to obtain changed elements.
• For every single-valued attribute and reference, there are explicit events that occur when a change is in progress (-Changing) and when the change occured (-Changed). However, you can configure Ecore2Code to supress these events.
• There is generic events PropertyChanging and PropertyChanged that support the framework interfaces INotifyPropertyChanging and INotifyPropertyChanged.

NMF itself implements a generic change recorder that records events sent from a model.