Proxy pattern: Difference between revisions

Revision as of 06:10, 2 June 2024

Revision as of 13:11, 24 December 2024

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Define a separate <code>Proxy</code> object that

* can be used as a substitute for another object (<code>Subject</code>), and

* implements additional functionality to control the access to this subject.

This makes it possible to work through a <code>Proxy</code> object to perform additional functionality when accessing a subject. For example, tolike checkchecking the access rights of clients accessing a sensitive object.

To act as a substitute for a subject, a proxy must implement the <code>Subject</code> interface. Clients can't tell whether they work with a subject or its proxy.

Clients can't tell whether they work with a subject or its proxy.

See also the UML class and sequence diagram below.