What
is the need for Visitor Pattern
|
• Visitor
class will include a method called visit which accepts the visited class
instance as parameter.
• Visited class will include a method called accept which accepts
the visitor class instance as parameter.
Here is
a sample code content in Visited Class:
public void accept(Visitor visitorObj) {
visitorObj.visit(this);
}
Now your visitor class has received an instance of visited class. Using this instance, visitor class can call accessible methods of visited class and retrieve the required information.
For example:
public void
visit(visitedClass obj) {
int number = obj.getNumber();
}
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