Mining subclassing directives to improve framework reuse

To help developers in using frameworks, good documentation is crucial. However, it is a challenge to create high quality documentation especially of hotspots in white-box frameworks. This paper presents an approach to documentation of object-oriented white-box frameworks which mines from client code four different kinds of documentation items, which we call subclassing directives. A case study on the Eclipse JFace user-interface framework shows that the approach can improve the state of API documentation w.r.t. subclassing directives.