Software architecture reconstruction is the process of analyzing an existing software system to produce an architectural representation of it. It involves extracting information from various sources like code, documentation, and profiles. This information is converted into a standard database format and combined from different sources through view fusion. The main activities of reconstruction are visualization and interaction with the views, and recognizing patterns in the code. It is an iterative process requiring both technical expertise and architectural skills to understand dependencies and evaluate how an implemented system conforms to its intended architecture.

1. Reconstructing software
architecture
DR. HIMANSHU HORA
SRMS College of Engg. & Tech., Bareilly
INDIA

2. Introduction:
 Architecture Reconstruction : is an “as-built”
architecture of an implemented of system i.e
obtained from the existing system.
 It is done through the “detail analysis” of the system,
using tool support.
 If the tools are successful, the end result is an
architectural representation.

3. What is Architecture Reconstruction?
 Although it is not an automatic process
 It is an “interpretive” , “interactive”, and “iterative”
process involving many activities.
 Requires the skills and attention of both the
engineering expert and the architect

4. Uses:
 To “redocument” the project architecture
 To understand the architectural dependencies in
embedded control software
 To understand different systems in the automotive
industry
 To evaluate the conformance of satellite ground system’s
implementation to its reference architecture

5. Reconstruction Activities:
Software architecture reconstruction comprise the
following activities,carreid out iteratively:-
 Information Extraction;
 Database Construction;
 View Fusion;
 Reconstruction.

6. Figure 1: Architecture Reconstruction activities

7. Information Extraction:
 The purpose of this activity is to extract information
from vavious source
 To extract information, a variety of tools are used:
* Parser(ex Imagix,CIA etc)
* Abstract syntax tree analyser (ex,Refine etc)
* Lexical analyser (ex,LSME)
* Profilers(ex,gprof)
*Ad hoc (ex,grep,perl etc)

8. Guidelines(Information Extraction):
 Use the “least effort” extraction
 Validate the information you have extracted
 Extract dynamic information where required

9. Database construction:
 Database construction involves converting
information into a standard form, such as Rigi
Standard Form(tuple based data format) & SQL
based database format
 It is necessary to chose a database model

10. For choosing model,consider the following:
 It should be a well known model
 Sufficient queries are allowed
 Support remote access to database
 Suppoerts view fusion by combining information
from various tables
 It supports query language

11. Guideline(database construction):
 Build database table from the extracted relations to
make processing of database view easier
 Carefully consider the database design
 Use simple lexical toollike perl and AWK

12. View Fusion:
 It combines information in the database to produce a
coherent view of architecture
 It involves defining and manipulating extracted
information to reconcile, augment ,and establish
connections between the elements

13. Guideline(View Fusion):
 Fuse table when no single extracted table provides
the needed information
 Fuse table when there is an ambiguity
 Consider different extraction techniques to extract
different information

14. Reconstruction:
 The reconstruction activity is where the main work of
building abstraction and various representation of the
data to generate an architecture representation take
place
 Reconstruction provides two basic activities:
* visualisation and interaction &
* pattern recognition and definition

15.  visualisation and interaction: A mechanism by
which the user may interactively visualise, explore
and manipulate views
pattern recognition and definition:provides
facilities for architectural reconstruction: the
definition and recognition of the code menifestation
of architectural patterns

16. Thank You
DR. HIMANSHU HORA
SRMS College of Engg. & Tech., Bareilly
INDIA