com.facebook.litho.sections.annotations

Annotation Type OnDiff

@Retention(value=RUNTIME)
public @interface OnDiff

A class annotated with DiffSectionSpec requires a method with this annotation. This method is responsible for generating a ChangeSet.

  @OnDiff
  public static void onCreateChangeSet(
      SectionContext context,
      ChangeSet changeSet,
      @Prop Diff<Component> component) {
    if (component.getNext() == null) {
      changeSet.delete(0);
    } else if (component.getPrevious() == null) {
      changeSet.insert(0, component.getNext());
    }
  }