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TSRI's approach to Ada
system modernization permits gradual integrated steps within a
model-driven methodology. Each step adds to a repository of
knowledge about the application portfolio and guides subsequent
steps in the modernization process. TSRI's automated processes
insure consistent code integrity so manual intervention is seldom
if ever used. Human decision-making is introduced only when
necessary to guide the automated processes.
TSRI legacy system
modernization begins by applying transformation rules to generate
a platform independent model from the legacy application source
code. TSRI calls this the Intermediate Object Model (IOM™).
Platform specific rules are then applied to the IOM™ to
derive the modernized application's source code. Any changes to
the model-driven modernization process are accomplished by
modifying rules or models. The software tool set developed by
TSRI containing these models, rules, and automated processes is
called JANUS™.
UML documentation can be
generated to support multiple views of all modernization
products. Code models and UML design can be interchanged using
XML Metadata Interchange (XMI) with other vendors' tools.
JANUS™ traces all rules to every object model
touched or created during the transformation process. TSRI solves
the O(N-squared) language transformation combinatorial problem by
transforming all legacy source languages into the IOM™, a
common platform and language neutral model. From the IOM™
multiple modern object oriented target languages can be generated
for platform specific targets. The IOM™ consists of a set
of language constructs common to all languages. By using the
IOM™ as an intermediate model, the inherently O(N-squared)
language transformation problem is reduced to an O(N) problem and
model driven processes for assessment, analysis, metrics,
documentation and re-factoring are reduced to O(1) problems.
These are consistently and uniformly solved for all languages and
platforms within the IOM™.
As an Object
Management Group (OMG) Platform Member, TSRI is a leading
contributor to the Architecture Driven Modernization Task Force
(ADM TF) where TSRI seeks to advance OMG standards supporting
best practices. TSRI's JANUS™ technology tools and
services adhere to the OMG ADM TF standards and recommended
practices.
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