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...stopher Alexander describes the concept of design patterns by saying "Each pattern describes a problem which occurs over and over again in our environment, an An alternative practical example of pattern combining: [[Wal's Fish Tank]].

== Spot the GoF pattern == * [[Proxy]]: ''Mimic''

== Pattern-oriented software architecture: A system of patterns == | [[Presentation abstraction control pattern]] || This is applicable to interactive software systems, and separates the

* [[Composite]] pattern and [[Avoid no-op overrides]] * [[Visitor|The visitor pattern]] and [[Acyclic dependencies principle|the acyclic dependencies principle]]

The Proxy design pattern is used to provide a stand-in for a real class. The proxy implements the same interface as the real class and forwards method calls t The [[Gang of Four|GoF]] specify four situations in which Proxy is applicable:

...erns-uncovered-0 here] a nicely explained java code example of the Adapter Pattern usage in the real world. * [[Decorator]]: This pattern adds functionality to an object without changing its interface and also sup

...tion that they belong to. This could be avoided by using the [[observer]] pattern, however I think the gain would be little. ...esent are actually stored in their respective Elements (they are a kind of proxy). As I said previously, they were created purely so they can be displayed

=== [[Proxy]] === By using a singleton on certain parts of a proxy a specific effect can be generated.

...ng, processing and outputting of service information away from the service proxy and place it in a data handler class. However, in my view what qualifies as ... DataHandler is a one to one relationship where dataHandler belongs to the Proxy. This relationship describes all proxies and all data handlers for each ser

A [[Proxy]] pattern provides an interface to services such as KeyLogger and ScreenGrabber. This ... analogous to baggages on the conveyer belt at the airport. Utilising this pattern allows the connection to act as the 'belt' and the services as the passenge

*2.[[Define classes by behavior, not state pattern]] - Similar point as above. Classes should model behaviour (or an interface *Bridge pattern used to separate interface/implementation dependencies between ''IRequest''