Class MaybePrimitiveModelBinder<T>

Namespace

Trellis.Asp.ModelBinding

Assembly

Trellis.Asp.dll

Model binder for Maybe<T> parameters where T is an STJ-native primitive in the closed allowed list defined by SupportedPrimitives. Binds optional route, query, form, and header parameters into Maybe<T>.

public sealed class MaybePrimitiveModelBinder<T> : IModelBinder where T : notnull

Type Parameters

T

One of: string, decimal, int, long, short, byte, double, float, bool, Guid, DateTime, DateTimeOffset.

Inheritance

object

MaybePrimitiveModelBinder<T>

Implements

IModelBinder

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.ReferenceEquals(object, object)

object.ToString()

Extension Methods

MaybeExtensions.AsMaybe<T>(T)

AggregateTestMutator.ClearMaybeField<TEntity, TValue>(TEntity, Expression<Func<TEntity, Maybe<TValue>>>)

AggregateTestMutator.SetMaybeField<TEntity, TValue>(TEntity, Expression<Func<TEntity, Maybe<TValue>>>, TValue?)

Remarks

• Parameter absent or empty → Maybe<T>.None (success, value not provided).
• Parameter present and parsable as T → Maybe.From(parsedValue).
• Parameter present but unparsable → model-state error; result is Failed().

Closes the binder-side parity gap with MaybeScalarValueJsonConverterFactory: route / query / header parameters typed Maybe<long> / Maybe<string> / etc. now bind directly without a wire-shape DTO + adapter at the seam. The allowed list lives on MaybePrimitives (non-generic) so the FrozenSet<T> is allocated once for the entire framework rather than once per closed generic.

Methods

BindModelAsync(ModelBindingContext)

Attempts to bind a model.

public Task BindModelAsync(ModelBindingContext bindingContext)

Parameters

bindingContext ModelBindingContext

The ModelBindingContext.

Returns

Task

A Task which will complete when the model binding process completes.

If model binding was successful, the Result should have IsModelSet set to true.

A model binder that completes successfully should set Result to a value returned from Success(object).