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java-design-patterns/mediator/index.md
Markus 5ce932ceb7 Work on #213 
- properly categorize all patterns
- remove pattern list from readme
- minor fixes to readme
- removed "introduction" because its not a pattern and an error i
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2015-08-20 21:40:07 +02:00

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pattern Mediator mediator /patterns/mediator/ Behavioral Java

Intent: Define an object that encapsulates how a set of objects interact. Mediator promotes loose coupling by keeping objects from referring to each other explicitly, and it lets you vary their interaction independently.

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Applicability: Use the Mediator pattern when

  • a set of objects communicate in well-defined but complex ways. The resulting interdependencies are unstructured and difficult to understand
  • reusing an object is difficult because it refers to and communicates with many other objects
  • a behavior that's distributed between several classes should be customizable without a lot of subclassing