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layout, title, folder, permalink, categories, tags
| layout | title | folder | permalink | categories | tags |
|---|---|---|---|---|---|
| pattern | Composite | composite | /patterns/composite/ | Structural | Java |
Intent: Compose objects into tree structures to represent part-whole hierarchies. Composite lets clients treat individual objects and compositions of objects uniformly.
Applicability: Use the Composite pattern when
- you want to represent part-whole hierarchies of objects
- you want clients to be able to ignore the difference between compositions of objects and individual objects. Clients will treat all objects in the composite structure uniformly
Real world examples:
- java.awt.Container and java.awt.Component
- Apache Wicket component tree, see Component and MarkupContainer