DMS®: Program Transformations for Practical Scalable Software Evolution
Proceedings of the 26th International Conference on Software Engineering
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Component-based software engineering enables applications to be assembled from component parts that adhere to a component-style specific interface specification and protocol. Components available for one style are not available for another. Component styles evolve, too, which can obsolete components using a legacy style. This creates a demand for migrating components from one style to another, which can require complex changes to the component source code. For a large component library, doing this manually is likely prohibitive. An alternative is to apply automated program transformations to carry out the changes. Using source-to-source transformations on real code requires a scalable, robust program transformation technology. Such technologies are difficult to justify for single applications. DMS' is a commercial program transformation system which has been used to transform many programming languages, including C++, C#, Java and ObjectPascal. It is parameterized by language and desired task, enabling its infrastructure costs to be amortized across many different software analysis or change applications. This demonstration shows a concrete example of DMS program transformations being used to migrate legacy C++ components from a Boeing distributed avionics software system, using a Boeing proprietary component format, to a CORBA component style. The conversion requires nontrivial understanding and manipulation of the C++ source code. It will explain the component migration problem to be solved, show some of the transformations, and actually convert a component.