A Component Controller serves as a central point within a software component, providing essential data and processing logic.
Based on the provided reference, a Component Controller provides data and processing logic that it should be possible to display or change for all views of a component. It acts as a hub for managing information and handling requests that affect the component's various visual representations (views).
Key Functions
The primary roles of a Component Controller, as described in the reference, include:
- Data Provision: It holds and manages the data that needs to be presented or modified across all the views belonging to the component.
- Logic Execution: It contains the processing logic necessary to handle user interactions, update data, or perform calculations relevant to the component as a whole.
- View Independence: By centralizing data and logic, the component controller allows individual views to focus solely on presenting the data and triggering actions, making them more reusable and less dependent on specific business logic.
Interfaces
The reference mentions that the component controller has three interfaces: Interface IF_<controller_name> for coding within the controller. While the reference specifically names one interface and suggests others exist (mentioning "three interfaces"), the described IF_<controller_name> interface is crucial.
IF_<controller_name>: This interface is used for implementing the actual logic and data management within the component controller itself. Developers write code here to define how the controller behaves and interacts with the component's data and other parts of the application.
Practical Insight
Think of a Component Controller as the "brain" of a self-contained part of your application. For example, in a user profile component, the Component Controller would fetch the user's data (name, address, email), store it, and contain logic for saving changes to the profile. All views related to the profile (a summary view, an edit view, a contact info view) would access this data and logic through the Component Controller.
- Example Scenario:
- A "Display Profile" view needs to show the user's name. It asks the Component Controller for the user data.
- An "Edit Profile" view allows changing the email. When the user saves, the view tells the Component Controller to update the email.
- The Component Controller validates the new email and updates the stored data, potentially saving it to a backend system.
This centralized approach ensures consistency and simplifies development by separating concerns.
