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33 lines
700 B
PHP
33 lines
700 B
PHP
<?php
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namespace DesignPatterns\Visitor;
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/**
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* Visitor Pattern
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*
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* The contract for the visitor.
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*
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* Note 1 : in C++ or java, with method polymorphism based on type-hint, there are many
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* methods visit() with different type for the 'role' parameter.
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*
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* Note 2 : the visitor must not choose itself which method to
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* invoke, it is the Visitee that make this decision.
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*/
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interface RoleVisitor
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{
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/**
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* Visit a User object
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*
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* @param \DesignPatterns\Visitor\User $role
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*/
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public function visitUser(User $role);
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/**
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* Visit a Group objet
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*
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* @param \DesignPatterns\Visitor\Group $role
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*/
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public function visitGroup(Group $role);
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}
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