Architecture contract (ARCH8204)

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Key kotlin.architecture.contract · Severity error · Category architecture

Flags an import against the layer direction, a feature’s boundary or the project’s own architecture rules: a feature under feature/, features/ or slices/ importing another feature’s behaviour (a class with functions, an object, a function - its data classes, enums and interfaces are allowed); data, service or domain code importing the presentation layer; the domain importing the data layer in a module whose data layer depends on its domain (where use cases call the data layer, as Android’s architecture guide has it, that is the design); or any import a rule in Project settings > Scanning forbids. A dependency between two Gradle modules is declared in the build and is checked only against the presentation rule and the project’s rules. Read from package names, not class names.

Incorrect

package app.data.repository

import app.ui.visit.VisitUiState

class VisitRepositoryImpl { fun load(): VisitUiState = TODO() }

Correct

package app.data.repository

import app.domain.model.Visit

class VisitRepositoryImpl { fun load(): Visit = TODO() } // the UI maps Visit to its own state