Adding New Functionality to Existing Objects
Explore how the Decorator design pattern helps you add new functionality to objects that cannot be directly modified. Understand its benefits in maintaining interface integrity, supporting dynamic behavior extension, and adhering to design principles like open-closed and single responsibility. This lesson equips you to enhance legacy or third-party components effectively.
We'll cover the following...
Problem statement
Let’s imagine we have a situation where there’s either some third-party library or our own legacy code that we need to use. We need to make some changes to its functionality. We’d either need to modify the existing behavior or add some new behavior. However, we can’t change the components that we’re about to use. This is because we either don’t have access to the internal code of those components or simply aren’t allowed to make this change.
Or maybe the external component isn’t fully ...