DTOMaker.Runtime.JsonSystemText 1.0.18-dev

DTOMaker

Warning: This is pre-release software under active development. Breaking changes may occur.

A collection of model-driven compile-time source generators for quickly creating DTOs (Data Transport Objects) supporting the following serialization schemes:

• JSON

and related types.

Workflow

---
title: Workflow
---
flowchart LR
    def(Define models e.g. IMyDTO.cs)
    ref1(Reference DTOMaker.Models.*)
    ref2(Reference DTOMaker.Runtime.*)
    ref3(Reference one or more source generators e.g. DTOMaker.MessagePack)
    bld(VS/Code/MSBuild)
    pkg(Assembly)
    ref1-->def
    def-->ref2
    def-->ref3
    ref2-->bld
    ref3-->bld
    bld-->pkg

Models are defined as C# interfaces with additional attributes. Here's a trivial example:

[Entity][Id(1)]
public interface IMyFirstDTO
{
    [Member(1)] string Name { get; set; }
}

If using the MessagePack source generator, the following implmentation will be generated (simplified):

[MessagePackObject]
public sealed class MyFirstDTO : EntityBase, IMyFirstDTO, IEquatable<MyFirstDTO>
{
    [Key(1)] string Name { get; set; }
}

Included Packages

This repo includes the following packages:

DTOMaker.JsonSystemText

A source generator that creates DTOs (Data Transport Objects) that are serializable to JSON.

DTOMaker.Runtime

Common types used at runtime by DTOMaker generated entities.

Model features

• Member value types: Boolean, S/Byte, U/Int16/32/64/128, Double, Single, Half, Char, Guid, Decimal
• String member types
• Binary member types (Octets)
• polymorphic types
• generic types
• entity members
• Built-in freezability (mutable until frozen) support
• [Obsolete] members
• Fixed length arrays of above value types.
• IEquatable<T> support
• Templates as testable code, template-to-generator processing.

MemBlocks features

• auto-embedded string, binary and entity members when encoded < 63 bytes.
• fixed-length string and binary member types.

!Limitations

Single compilation unit

All models and generated DTOs are contained within a single assembly. Models cannot reference types in other projects or packages (other than native or built-in types). Generated classes are partial, which can help you mitigate the single assembly constraint.

Development

In progress

• custom struct members (to avoid primitive obsession)

Coming soon

• Json (System.Text) generator
• upgrade source generators to IIncrementalGenerator
• global interface equality comparer
• reservation (hidden members)
• Orleans generator
• ProtobufNet 3.0 generator
• MessagePack 3.x generator
• NetStrux generator
• MemBlocks compact layout method
• Enum data types. Workaround - enums can be implemented with an underlying integer property and a cast.
• MemBlocks nullable types. Workaround - T? can be implemented with a pair of members (Boolean, T).

Coming later

• Google Protobuf .proto generation
• model.json generation
• command-line alternative
• variable length arrays
• logical value equality
• Rune member types