Interface IRepresentationValidator<T>

Namespace

Trellis.Asp

Assembly

Trellis.Asp.dll

Strategy for generating representation-specific validators (ETags) that account for content negotiation variants per RFC 9110 §8.8.3.1/§8.8.3.3.

public interface IRepresentationValidator<in T>

Type Parameters

T

The domain type being represented.

Extension Methods

MaybeExtensions.AsMaybe<T>(T)

MaybeExtensions.ToResult<TValue>(TValue)

NullableExtensions.ToResult<T>(T?, Func<Error>)

NullableExtensions.ToResult<T>(T?, Error)

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

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

Remarks

The default Trellis behavior generates ETags from aggregate state only. When the same resource has multiple representations (different encodings, languages, media types, or projections), each variant needs a distinct ETag.

Implement this interface to combine domain version with variant metadata. Register as a service; Trellis response mappers will use it when available.

Methods

GenerateETag(T, string?)

Generates an EntityTagValue for the given value and representation variant.

EntityTagValue GenerateETag(T value, string? variantKey = null)

Parameters

value T

The domain value.

variantKey string

Optional variant key (e.g., encoding, language, projection ID).

Returns

EntityTagValue

The entity tag for this specific representation.