Architectural Patterns

Mediator

The Mediator pattern advocates defining ways of interactions between encapsulated objects without depending on each other by explicit reference.

The preceding diagram is a typical structure of the Mediator pattern, where Mediator or dialog director defines an interface to communicate with other colleague objects; concrete mediator implements cooperative behavior by coordinating colleague objects.

Let's look at the benefits:

• Limits subclassing (by localizing behavior and restricting the distribution of behaviors to several other objects)
• Enforcing decoupling between colleagues objects
• Simplifying object protocols (replaces many-to-many ...