Composite

The Composite design pattern composes objects into tree structures to represent part-whole hierarchies. This pattern lets clients treat individual objects and compositions of objects uniformly.

Usage          Medium-high

UML class diagram

A visualization of the classes and objects participating in this pattern.

Sample code

This structural code demonstrates the Composite pattern which allows the creation of a tree structure in which individual nodes are accessed uniformly whether they are leaf nodes or branch (composite) nodes.

Output

See also

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• Common Design Patterns
• Design Guidelines
• Documentation