Design Patterns in Go: State
Behavioral Patterns target issues related to communication and interaction between objects. They focus on defining protocols for collaboration among objects that are often too complex to design statically, enabling dynamic delegation of responsibilities at runtime.
OK, Let’s go through the description of the 4th behavioral pattern — State Pattern.
Context:
When an object’s behavior needs to change based on its internal state, a common approach is to use if-else statements to handle different cases. However, as the number of states and behaviors increases, this approach becomes cumbersome and leads to code that is difficult to maintain and extend.
Adding numerous if-else statements can result in code that is hard to read, understand, and modify. It violates the Open-Closed Principle, as each new state or behavior requires modifying the existing code, potentially introducing bugs and making the codebase more fragile.
State Pattern allows an object to alter its behavior dynamically by changing its internal state, without changing its class or the code that uses it.
Solution:
The State Pattern offers a more elegant and maintainable solution. By encapsulating each state’s behavior in separate State objects, the pattern eliminates the…
