1. FRAMEWORKS AND REUSE What is “Framework”?
A component like object-oriented reuse technique.
What is a “pattern”?
Pattern= a problem + the solution context+ the solution
in other words,
Pattern = a technique to solve a problem + cost + benefits
Framework = Component + Pattern
Author of the paper: Ralph E. Johnson

2. Framework examples
A framework is reusable design of all or parts of the system.
Framework Examples:
• OLE
• OpenDoc
• Java AWT
• Java Beans

3. Main features of a “Framework”
A “Framework” has
• Component like architecture
• Standard interfaces
• Customizable architecture
• capability to create new component
# creating template, component specification
• Capability of creation of “design reuse”
• Expressed in OO programming languages

4. Designing a “Framework”
Designing a “Framework” is like designing a programming language,
except that the only concrete syntax is the one used to implement the
“Framework”.
A “Framework” consists of many “Patterns”.

5. Advantages of “Framework”
• Saving development time.
• Saving development money.
• Helps companies for “time to market” for a product.

6. Drawbacks of Framework
• Difficult to learn.
• Hard to develop.
• Require longer training for user.
• Require better documentation.
• Costly to develop.