提高Java代码重用性：优化GenericVisitorAdapter实现

Java GenericVisitorAdapter

Java GenericVisitorAdapter is a visitor pattern implementation in Java that allows a flexible and extensible way to traverse the object structure. It provides a way to separate the operations applied on a hierarchy of object from the objects themselves, making it easier to add new operations without modifying the existing code.

The visitor pattern is based on the idea of double dispatch, which means that the method to be called is determined at runtime based on the type of both the visitor and the visited object. This is different from the traditional object-oriented polymorphism, where the method call is determined at compile time based only on the type of the object.

The GenericVisitorAdapter is a generic implementation of the visitor pattern that abstracts away most of the visitor implementation details, making it easier to write new visitors that only implement the operations that are relevant to them.

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