The Bridge Design Pattern is a structural pattern that separates an abstraction from its implementation so that both can evolve independently. This pattern is useful when you need to decouple an abstraction from its implementation, allowing them to vary independently without affecting each other. The Bridge Pattern is particularly effective in scenarios where you have multiple variations of both an abstraction and its implementation.
1. Database Connectivity
- Scenario:
A data access layer needs to support multiple databases (e.g., MySQL,
PostgreSQL, Oracle) and provide a unified interface for database
operations.
- Bridge
Use Case: Create an AbstractDatabaseConnection
class and an IDatabaseImplementor interface. Implementations like MySQLConnection
and PostgreSQLConnection provide database-specific functionality. This
setup allows for adding new databases without changing the data access
interface.
2. Notification Systems
- Scenario: A notification system needs
to support various notification channels (e.g., email, SMS, push
notifications) and provide a unified notification interface.
- Bridge Use Case: Define an
AbstractNotification
class and aNotificationChannelImplementor
interface. Implementations likeEmailNotification
andSMSNotification
handle specific channels. This design allows for adding new notification channels or modifying existing ones without changing the notification system interface.
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