java-design-patterns/prototype/index.md at 339db2a0bfcdd0d3219f1b43a9e3b59e4ecddcd6

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Narendra Pathai b3e4e8a47b Work on #226 , #213 , added references of Gang Of Four to all GoF patterns, added tag for Gang Of Four, added difficulty tags to some of them

2015-09-22 18:25:56 +05:30

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pattern

Prototype

prototype

/patterns/prototype/

Creational

Java

Gang Of Four

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

Real world examples:

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