Dependency Injection

CLASS … DEFINITION … .
 DATA(lo_cash_provider) = NEW cl_cash_provider( ).
ENDCLASS

👆🏽 This here is a Dependency

• Dependency injection is a design pattern in which, instead of creating the object ourselves in our code, we let some other entity create the object and "inject" into our class.
• ⇒ Dependency injection implements Inversion of Control

The dependency can be injected via:

• constructor -- Constructor Injection
• setter method -- Setter Injection
• parameter - Parameter Injection
• backdoor - Backdoor Injection

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Children

1. Backdoor Injection
2. Constructor Injection
3. Field Injection
4. Parameter Injection
5. Setter Injection

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Backlinks

• Test Isolation (cs)
• Spring (cs)
• Dependency Injection (cs)
• Benefits of Composition (cs)