Software Architecture Design Patterns in Java

3 INTERFACE

This pattern was previously described in Grand98.

DESCRIPTION

In general, the functionality of an object-oriented system is encapsulated in the form of a set of objects. These objects provide different services either on their own or by interacting with other objects. In other words, a given object may rely upon the services offered by a different object to provide the service it is designed for. An object that requests a service from another object is referred as a client object. Some other objects in the system may seek the services offered by the client object.

From Figure 3.1, the client object assumes that the service provider objects corresponding to a specific service request are always of the same class type and interacts ...