Visitor

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Details

Last Updated on 31 October 2010

Written by Administrator

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Goals

Represent an operation to be performed on the elements of an object structure. Visitor lets you define a new operation without changing the classes of the elements on which it operates.

This pattern usually makes use of a double dispatch mechanism to:

• avoid the visitor to have knowledge about the element structure for visiting it
• avoid the element to have knowledge about the operation the visitor performs

UML

C#

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