- Last Updated on 31 October 2010
- Written by Administrator
- Hits: 1869
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