CS 4448 - Fall 1998
Object-Oriented Programming and Design
Talk 8.2
by
Jennifer Dai

I. Type of Reuse:

II Code Reuse

--The most common kind of reuse

--sharing common classes

--copying and modifying exiting code

--have access to the source code

--main advantage:

--reduces the actual amount of source code need to write

--decreases both development and maintenance cost

• Inheritance Reuse
• Advantage

• Decrease development time and cost

• Disadvantage

• Misuse results higher level of reuse
• Fragile class hierarchy difficult to maintain and enhance

• Template reuse
• Document reuse
• Advantage

• Increase the consistency and quality of development artifacts

• Disadvantage

• Not share changes with coworkers

• Component Reuse
• Use of pre-built components in the application
• Don’t have access to the source code
• Don’t use subclasses

• Advantage

• Greater scope of reusability
• Create at a low cost

• Disadvantage

• Need a large library of them

• Framework Reuse
• Use of classes that implement the basic functionality
• Advantage

• Encapsulate complex logic

• Disadvantage

• Difficult to master
• Platform-specific

• Artifact reuse
• Advantage

• Promotes consistency between projects
• Reduces the project management burden
• Can purchase or find them on line

• Disadvantage

• Perceived as overhead reuse

• Pattern reuse
• The use of publicly documented approaches to solve common problems
• Advantage

• Can implement across multiple languages
• Recognizable

• Disadvantage

• Don’t provide an immediate solution

• Domain component reuse
• Large scale, reusable business components
• Provides greatest potential for reuse
• Advantage

• Can use them simultaneously

• Disadvantage

• Hard to master

• The secret to reuse success
• Reuse at least 3 times on 3 separate projects
• Must be well documented and have real world example
• Plan for it
• Reuse is an attitude