re-engineering and domain analysis by- nishanth tiruvaipati
TRANSCRIPT
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RE-ENGINEERINGANDDOMAIN ANALYSIS
BY- NISHANTH TIRUVAIPATI
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INTRODUCTION
Necessity of Re-Engineering.
Purpose of Re-Engineering:
--Documentation
--Maintenance
--Re-Use
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Problems in Re-Engineering
--Changes in original program.
--Program intended for a specific purpose only.
--There are many programs running simultaneously.
--Not all problems are expressed with Code
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DOMAIN ANALYSIS
Domain Analysis is the “Problem Area”. Areas into which Domains can be divided:
--relations between Objects.
--Solutions and their approximations
--Store of Data and Knowledge about the program.
Characteristics:
--Vocabulary
--Architectural approach
--Common assumptions
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Domain Analysis:
--Identify objects, operators & relationships
Domain Representation:
--Represents results in systematic order
The exact from of representation and the extent of its formality are important for both the Software Engineer and Re-Engineer.
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Relationship to Re-Engineering
Domain descriptions represent expected constructs to look out in the code.
Since all the issues can’t be looked into domain analysis establishes expectations to be confirmed in the program.
Domain analysis are related to each other and are organized in prototyping order that may be related to program.
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Approaches to Domain Modeling
Algebraic:
--its semantic represented in equations, combination of operations preformed and data items of type.
Denotational:
--Languages like VDM and Z are used.
--represent data in equations using sets, lists, tuples and maps.
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Issues
Methodology
--Can domain analysis help?
--Where should we start?
--The method should be illustrative and expansive as the code grows.
Representation
--Who do we represent domain information?
--how do we represent several domains?
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--How much formality should reach domain represent
Tools
--What kind of tools are required, Browser type tools? CASE tools? New approach?
--Tools need to have validity check of representation of complex domains.
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Research
Current work
--Use of CASE tool in Interactive Environment Development
Software through Pictures (StP)
--Use of Object Oriented frame work to record understand.
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Conclusion
We can obtain maximum leverage in reuse by using highest possible level of abstraction and domain knowledge.
Hence we can consider domain model as a efficient approach for Re-engineering.