April 2004
Intermediate to advanced
520 pages
10h 10m
English
Content preview from Software Architecture Design Patterns in Java
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39 OBJECT AUTHENTICATOR
The Object Authenticator pattern is also known as the Protection Proxy and was previously described in GoF95.
DESCRIPTION
In general, objects in an application interact with each other to offer the overall application functionality. Most application objects are generally accessible to all the other objects in the application. At times, it may be necessary to restrict the accessibility of an object only to a limited set of client objects based on their access rights. When a client object tries to access such an object, the client is given access to the services provided by the object only if the client can furnish proper authentication credentials. In such cases, a separate object can be desig-nated with the responsibility ...