Zustandsmuster

Zustandsmuster, also known as state pattern, is a behavioral design pattern used in software engineering to allow an object to alter its behavior when its internal state changes. This pattern enables an object to appear as if it changes its class, simplifying state management and enhancing code maintainability.

The core idea of the Zustandsmuster is to encapsulate state-specific behaviors into separate state objects. The context object, which maintains a reference to a state object, delegates state-dependent behavior to the current state. When a state transition occurs, the context updates its reference to a different state object, thus changing its behavior dynamically.

This pattern is particularly useful in scenarios where an object must change its behavior at runtime based on internal conditions, such as in workflow systems, UI controllers, or protocol implementations. By separating state-specific behaviors into distinct classes, Zustandsmuster helps reduce complex conditional statements and promotes a cleaner, more modular design.

Implementing zustandsmuster typically involves defining an abstract state interface with methods corresponding to actions that vary by state. Concrete state classes implement this interface, defining behavior specific to that state. The context class manages state transitions and delegates calls to the current state object.

Overall, the Zustandsmuster offers a flexible solution for managing complex state-dependent behavior, facilitating easier maintenance and scalability in software systems that require dynamic state changes.