AOP for Traversal-related Concern

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AOP for Traversal-related Concern Pengcheng
Wu COM3362
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• Separation of Concerns par72 is to manage and
  implement conceptual unit in a modular way
• In real word problems, concerns are usually
  inherently crosscutting each other
• Available main stream programming models usually
  are good at handle with one concern at a time
• Object-oriented programming is good for
  abstracting data or class concernoss00
• Procedure-oriented programming is good for
  abstracting function concern
• AOP is proposed to handle with crosscutting
  concerns
• In principle, it can be applied to any
  programming paradigm, but currently most are on
  OO programming
• Some concerns by AOP, e.g., logging,
  contract-checking,roles

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• Traversal is a concern, e.g., traversal on a
  AST. Special concern needs special AOP language.
• Parallel between AspectJ and Demeter

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• When is the most important aspect of the
  design. Using AspectJ terminology, JoinPoint
  model
• What are in the join point model?
• When to execute code
• What arguments available to the advice/Visitor
  method
• Reflection
• In DJ, with edge wrappers and FunctionVisitor
  added, we can do more symmtric mapping between
  the Join Point Model of DJ and that of AspectJ

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Traveral Graph
Call Graph
aA
aA
l
foo()
bB
bB
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