SaFi Bank Space : Data classes

In general, most of services will use some kind of domain entities (Abc in these examples) and will have the following data classes

In “chronological” (from client to DB) order

• DTO

  • ph.safibank.examplemanager.controller.model.AbcDto

  • Data transfer object (DTO) used to communicate between the client and Controller class

  • DTOs should not be passed deeper to Services etc., also

• Model

  • ph.safibank.examplemanager.model.Abc

  • Main model used for business logic (mostly in Service classes)

• DB Entity

  • ph.safibank.examplemanager.model.entity.AbcEntity

  • Database entity model, consumed and produced by AbcRepository class

  • Should be converted to model when passed around to Services, Controllers, etc.

Conversions

We frequently use Kotlin extension functions to convert from one data class to another.

• AbcDto.toModel()

• Abc.toDto()

• Abc.toEntity()

• AbcEntity.toModel()

The convention is to have the converter function(s) present in the target class file, not the source class file.

For example: fun AbcDto.toModel(): Abc lives in the model class Abc.kt not in the DTO class AbcDto.kt