A class diagram always helps with understanding the structure of a design pattern. This video walks through a class diagram for the adapter pattern.
- [Instructor] Now that we have a conceptual idea … of what Adapter does, … let's take a look at the formal definition … and the structure of the pattern … from the Gang of Four Catalog. … First, let's take a look at the definition. … So, the Adapter Pattern is used to convert the interface … of a class into another interface that clients expect. … Adapter lets classes work together … that couldn't otherwise … because of incompatible interfaces. … So, this pattern's going to give us a way … to have two classes work together … when they have incompatible interfaces. … Remember that for every pattern, … we have a class diagram … that explains the pattern structurally. … Let's walk through the Adapter Pattern's class diagram. … First, we have a client … that is expecting to make a call … on a target interface. … In our example, the target interface … would be the old vendor's interface. … Next, we have an Adapter class … that implements that target interface. … This class is composed with an Adaptee class …
- What are design patterns?
- Encapsulating code that varies with the Strategy pattern
- The limitations of inheritance
- Using the Adapter pattern
- Implementing the Observer pattern
- Extending behavior with composition and the Decorator pattern
- Encapsulating iteration with the Iterator pattern
- Object creation with the Factory Method pattern
- Using design principles to guide your object-oriented design
Skill Level Intermediate
1. Design Patterns
2. The Strategy Pattern
3. The Adapter Pattern
4. The Observer Pattern
Using the Observer pattern2m 23s
5. The Decorator Pattern
6. The Iterator Pattern
7. The Factory Patterns
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