layout, title, folder, permalink, pumlid, categories, tags
| layout | title | folder | permalink | pumlid | categories | tags | |||
|---|---|---|---|---|---|---|---|---|---|
| pattern | Prototype | prototype | /patterns/prototype/ | HSV13OCm30NGLM00udktCS62eCInxE-YRj_UUdjlRLfx7fBUbmkmU14vF-Lik7BF4AzJ8OfIvw3Mys6mqyrltWw9Tkfc38XhqE3uWSmd9Zuc9AZ_bVHHB4V_0W00 | Creational |
|
Intent
Specify the kinds of objects to create using a prototypical instance, and create new objects by copying this prototype.
Applicability
Use the Prototype pattern when a system should be independent of how its products are created, composed and represented; and
- when the classes to instantiate are specified at run-time, for example, by dynamic loading; or
- to avoid building a class hierarchy of factories that parallels the class hierarchy of products; or
- when instances of a class can have one of only a few different combinations of state. It may be more convenient to install a corresponding number of prototypes and clone them rather than instantiating the class manually, each time with the appropriate state