Headline

A design pattern to separate operations from an object model

Illustration

See Contribution:javaVisitor for an illustration.

Quote

(http://en.wikipedia.org/wiki/Visitor_pattern, 18 April 2013)

In essence, the visitor allows one to add new virtual functions to a family of classes without modifying the classes themselves; instead, one creates a visitor class that implements all of the appropriate specializations of the virtual function. The visitor takes the instance reference as input, and implements the goal through double dispatch.

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Ralf Lämmel edited this article at Mon, 26 Jun 2017 14:55:55 +0200
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    For you are available next options:

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