RichEntity 1.1.0

RichEntity

A library for reducing boilerplate when defining entities. It is using Roslyn's Source Generators to generate the code that is needed for entity definition.

Usage

To generate an entity, you will need to add an IEntity<TIdentifier> to base list of your entity class.

public partial class Sample : IEntity<int> { }

The library will generate this code in the background.

public partial class Sample : IEquatable<Sample>
{
    public Int32 Id { get; protected init; }

#pragma warning disable CS8618
    protected Sample(Int32 id)
#pragma warning restore CS8618
    {
        Id = id;
    }

#pragma warning disable CS8618
    protected Sample()
#pragma warning restore CS8618
    {
    }

#nullable enable
    public bool Equals(Sample? other)
#nullable restore
    {
        return (other?.Id.Equals(Id) ?? false);
    }

#nullable enable
    public override bool Equals(object? other)
#nullable restore
    {
        return Equals(other as Sample);
    }

    public override int GetHashCode() => (Id).GetHashCode();
}

You can customize generated code via attributes.

ConfigureConstructorsAttribute

To configure generated entity constructors decorate type with ConfigureConstructorsAttribute.

Settings:

• ParametrizedConstructorAccessibility
  Accessibility of parameterized constructor (Entity(TIdentity id)).

[ConfigureConstructors(ParametrizedConstructorAccessibility = Accessibility.Public)]
public partial class Sample : IEntity<int> { }

public partial class Sample : IEquatable<Sample>
{
    public Int32 Id { get; init; }

#pragma warning disable CS8618
    protected Sample(Int32 id)
#pragma warning restore CS8618
    {
        Id = id;
    }

#pragma warning disable CS8618
    protected Sample()
#pragma warning restore CS8618
    {
    }

#nullable enable
    public bool Equals(Sample? other)
#nullable restore
    {
        return (other?.Id.Equals(Id) ?? false);
    }

#nullable enable
    public override bool Equals(object? other)
#nullable restore
    {
        return Equals(other as Sample);
    }

    public override int GetHashCode() => (Id).GetHashCode();
}

ConfigureIdAttribute

To configure generated identifier decorate type with ConfigureIdAttribute.

Settings:

• SetterAccessibility
  Accessibility of Id property setter.
• SetterType
  Type of Id property setter (set / init).

[ConfigureId(SetterAccessibility = Accessibility.Internal, SetterType = SetterType.Set)]
public partial class Sample : IEntity<int> { }

public partial class Sample : IEquatable<Sample>
{
    public Int32 Id { get; internal set; }

#pragma warning disable CS8618
    protected Sample(Int32 id)
#pragma warning restore CS8618
    {
        Id = id;
    }

#pragma warning disable CS8618
    protected Sample()
#pragma warning restore CS8618
    {
    }

#nullable enable
    public bool Equals(Sample? other)
#nullable restore
    {
        return (other?.Id.Equals(Id) ?? false);
    }

#nullable enable
    public override bool Equals(object? other)
#nullable restore
    {
        return Equals(other as Sample);
    }

    public override int GetHashCode() => (Id).GetHashCode();
}

Composite key entities

For entities with composite key, you can use an IEntity interface with KeyProperty attribute.
It will generate a constructor, an Equals implemetation and a GetHashCode implementation for that property.
For properties of type IEntity<TIdentifier> the property of type TIdentifier will be generated as well (and it will be used in all implementations listed above).

public partial class C : IEntity
{
    [KeyProperty]
    public Sample Sample { get; init; }

    [KeyProperty]
    public int Composite { get; init; }
}

This will generate:

public partial class C : IEquatable<C>
{
    public Int32 SampleId { get; protected init; }

#pragma warning disable CS8618
    protected C(Int32 composite, Int32 sampleId)
#pragma warning restore CS8618
    {
        Composite = composite;
        SampleId = sampleId;
    }

#pragma warning disable CS8618
    protected C()
#pragma warning restore CS8618
    {
    }

#nullable enable
    public bool Equals(C? other)
#nullable restore
    {
        return (other?.Composite.Equals(Composite) ?? false) && (other?.SampleId.Equals(SampleId) ?? false);
    }

#nullable enable
    public override bool Equals(object? other)
#nullable restore
    {
        return Equals(other as C);
    }

    public override int GetHashCode() => (Composite, SampleId).GetHashCode();
}