One of the features of JFace is that the ordering of the data can be processed by the view, rather than having to require that the data structure do the processing. This makes it easy to present filtered views, where the user either searches for a particular term, or performs a sort in a different manner. These filters are used heavily in the Eclipse IDE, where options such as Hide libraries from external and Hide closed projects can be found in many of the drop-down actions for the view.