Implementing delta-oriented SPLs using PEoPL: an example scenario and case study

Software product line implementation techniques are complementary. Thus, moving fluidly between them would be beneficial. Our tool PEoPL, a novel instantiation of the MPS language workbench, supports projecting a common variational AST into user-editable projections, each of which represents a different product line implementation technique. PEoPL supports FOP-like, annotative and product projections and allows developers to move fluidly between them. In this paper, we lay the foundation for future delta-oriented projectional editors. We use an example scenario to discuss a mapping of DeltaJ language concepts to the variational AST and operations employed in PEoPL. In a case study, we show that PEoPL is expressive enough to represent DeltaJ product lines, and at the same time supports all delta manipulations.