DP44/enriched-qwen3-coder-next/Common/DTS.Common/Interface/ViewData.md

source_files, generated_at, model, schema_version, sha256

source_files	generated_at	model	schema_version	sha256
Common/DTS.Common/Interface/ViewData/IViewDataView.cs Common/DTS.Common/Interface/ViewData/IViewDataViewModel.cs	2026-04-16T02:59:18.775792+00:00	Qwen/Qwen3-Coder-Next-FP8	1	bb1cd33bbb5a471b

ViewData

1. Purpose

This module defines the foundational interfaces IViewDataView and IViewDataViewModel for implementing the View-ViewModel pattern within the DTS (likely Data Tracking System) architecture. These interfaces serve as contract markers—extending IBaseView and IBaseViewModel respectively—to semantically distinguish view and view model types specifically responsible for view data concerns (e.g., UI state, presentation logic, data binding payloads). They exist to enforce architectural separation and enable type-based conventions (e.g., dependency injection, view resolution, or validation logic) without adding behavior beyond inheritance.

2. Public Interface

No additional public members are declared beyond interface inheritance. The interfaces themselves are empty (marker) interfaces.

• IViewDataView
public interface IViewDataView : IBaseView
  A marker interface indicating that a type represents a view dedicated to rendering view data. It inherits all contract obligations of IBaseView (not shown here), which may include lifecycle or navigation contracts (e.g., Initialize, Load, Unload), but those are defined externally.

• IViewDataViewModel
public interface IViewDataViewModel : IBaseViewModel
  A marker interface indicating that a type represents a view model responsible for encapsulating view data. It inherits all contract obligations of IBaseViewModel (not shown here), which may include data binding support, state management, or command interfaces.

3. Invariants

• Any type implementing IViewDataView must also implement IBaseView.
• Any type implementing IViewDataViewModel must also implement IBaseViewModel.
• These interfaces impose no additional runtime constraints (e.g., no validation, no required properties/methods beyond base interface contracts).
• They are intended to be used exclusively for view data–related concerns; other view/view model concerns (e.g., navigation, modal dialogs) likely use different specialized interfaces (e.g., INavigationView, IModalViewModel—inferred from naming convention but not present here).

4. Dependencies

• Depends on:
  • DTS.Common.Base.IBaseView (via IViewDataView)
  • DTS.Common.Base.IBaseViewModel (via IViewDataViewModel)
    (Exact definitions of IBaseView and IBaseViewModel are not provided in the source and must be consulted separately.)
• Depended on by:
  • Likely consumed by DI containers, view/view model registration logic, or framework-level view resolution (e.g., services.AddTransient<IViewDataView, MyView>()).
  • May be referenced by conventions in view binding or serialization logic (e.g., filtering view models by IViewDataViewModel for data export).
    (Specific consumers are not visible in the provided source.)

5. Gotchas

• Ambiguity of base interfaces: Behavior and obligations of IBaseView and IBaseViewModel are undefined here; misalignment with their contracts could lead to runtime errors (e.g., if IBaseView expects Initialize() but IViewDataView implementers omit it).
• No behavioral guarantees: As marker interfaces, they provide no compile-time safety—implementers may still violate intended semantics (e.g., a class named IViewDataViewModel might handle business logic instead of view data).
• Namespace collision risk: Both interfaces reside in DTS.Common.Interface, which is broad; without stricter naming or sub-namespaces (e.g., DTS.Common.Interface.ViewData), future interfaces may conflict.
• No versioning guidance: Since interfaces are empty, adding members later would be a breaking change—but no documentation clarifies versioning strategy or migration path.
• None identified from source alone.