Visitor
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The Visitor is a [[Behavioural pattern|behavioural pattern]]. It allows the designer to define new operations on a class and its members, without modifying the class itself. | The Visitor is a [[Behavioural pattern|behavioural pattern]]. It allows the designer to define new operations on a class and its members, without modifying the class itself. | ||
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| + | ==Description== | ||
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| + | The Visitor describes three major roles: | ||
| + | *Object Structure: Provides a visitor with access to its elements | ||
| + | *Element: Accepts visits | ||
| + | *Visitor: Accesses an element to perform operations | ||
Revision as of 06:26, 30 July 2008
Introduction
The Visitor is a behavioural pattern. It allows the designer to define new operations on a class and its members, without modifying the class itself.
Description
The Visitor describes three major roles:
- Object Structure: Provides a visitor with access to its elements
- Element: Accepts visits
- Visitor: Accesses an element to perform operations
