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SUBSCRIBE NOWWhat is the Flyweight Class Diagram?
The Flyweight Design Pattern is a structural pattern designed to handle high volumes of fine-grained objects efficiently by sharing common state. The Class Diagram provides a blueprint of the architectural relationships between the participants that make this memory-sharing possible.
By defining clear responsibilities across separate interfaces and classes, the pattern ensures that shared data remains untouched while context-dependent parameters can be passed in dynamically.
Key Participants in the Class Diagram
- Flyweight Interface: Declares the contract and operation methods through which flyweights can receive and act upon extrinsic state passed from the outside.
- ConcreteFlyweight: Implements the Flyweight interface and stores the internal intrinsic state that is immutable and shared across multiple contexts.
- UnsharedConcreteFlyweight: Represents instances where sharing is not required or feasible; not all subclasses of the Flyweight interface need to be shared.
- FlyweightFactory: Manages a pool or cache of existing flyweight objects. When requested, it returns an existing instance from the cache or creates a new one if it does not yet exist.
- Client: Maintains references to flyweight objects, computes or stores the extrinsic state, and passes it to the flyweight when invoking operations.
Structural Benefits & Best Practices
- Strict Object Separation: Clear division between intrinsic (stored inside) and extrinsic (supplied by caller) state keeps memory usage predictable.
- Centralized Factory Control: The factory enforces object pooling so that duplicate objects with identical intrinsic states are never created.
- Clean UML Architecture: Easy to interpret and implement across enterprise applications, graphics rendering engines, and document editors.
Watch More Related Design Pattern Tutorials
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| Flyweight Design pattern - Class Diagram |
See also:
ReplyDeleteClass diagrams are used around the world to get a quick overview of a system.It describes the structure of a system by showing its classes, attributes and operations of those classes and the relationship between those classes. You can have a deep understanding with the resources in Creately diagram community. Please refer this UML class diagram templates to learn more.