The Composite pattern allows clients to treat primitive objects and containers of objects uniformly by composing them into tree structures. It allows clients to treat individual objects and compositions of objects in a uniform manner. The pattern allows clients to recursively compose objects into tree structures to represent part-whole hierarchies.

1. Structural Patterns - Composite
Melbourne Patterns Group July 1 2009
Chris Bushell

2. Intent
Allow clients to treat primitive objects and
containers in the same way

3. Graphics Example
• Line
• Rectangle
• Text
etc.

4. Graphics Example Continued
Graphic
Line
Rectangle
Picture
Line
Rectangle

5. Recursive Composition

6. Puzzle Example

7. Participants
• Component
• Leaf
• Composite

8. Participants

9. Code