Class DerivedTypeClassMapConvention

Namespace

Cratis.Arc.MongoDB

Assembly

Cratis.Arc.MongoDB.dll

Class map convention that registers the derived-type discriminator convention for every concrete [DerivedType] as its class map is created.

public class DerivedTypeClassMapConvention : ConventionBase, IClassMapConvention, IConvention

Inheritance

object

ConventionBase

DerivedTypeClassMapConvention

Implements

IClassMapConvention

IConvention

Inherited Members

ConventionBase.Name

object.GetType()

object.MemberwiseClone()

object.ToString()

object.Equals(object)

object.Equals(object, object)

object.ReferenceEquals(object, object)

object.GetHashCode()

Extension Methods

MethodCalls.CallGenericMethod<TOut, T>(T, Expression<Func<T, Func<TOut>>>, params Type[])

MethodCalls.CallGenericMethod<TOut, T, T1>(T, Expression<Func<T, Func<T1, TOut>>>, T1, params Type[])

MethodCalls.CallGenericMethod<TOut, T, T1, T2>(T, Expression<Func<T, Func<T1, T2, TOut>>>, T1, T2, params Type[])

MethodCalls.CallGenericMethod<TOut, T, T1, T2, T3>(T, Expression<Func<T, Func<T1, T2, T3, TOut>>>, T1, T2, T3, params Type[])

ConverterExtensions.ConvertTo(object, Type)

ConceptExtensions.GetConceptValue(object)

ConceptExtensions.IsConcept(object)

JsonValueExtensions.ToJsonValue(object?)

ObservableExtensions.InvokeAndWrapWithSubject<TResult>(object, Func<CancellationToken, IObservable<TResult>>)

ObservableExtensions.InvokeAndWrapWithTransformSubject<TResult, TSource>(object, Func<CancellationToken, IObservable<TSource>>, Func<TSource, TResult>)

Remarks

The target types (interfaces and base classes) get the convention registered up front, but the driver resolves the discriminator convention per CLASS MAP when delegating from a discriminated interface serializer to the concrete type's serializer — and it passes the original (interface) nominal type along. Without this registration the concrete type's class map falls back to the driver's default "_t" convention, which cannot see the "_derivedTypeId" element and answers with the interface nominal type, bouncing deserialization back to the discriminated interface serializer in an unbounded loop that overflows the stack. Registering the same convention for the concrete types keeps both sides symmetric: writes emit "_derivedTypeId" and the re-check resolves to the type itself, terminating the delegation.

Constructors

DerivedTypeClassMapConvention(IDerivedTypes, IDiscriminatorConvention)

Class map convention that registers the derived-type discriminator convention for every concrete [DerivedType] as its class map is created.

public DerivedTypeClassMapConvention(IDerivedTypes derivedTypes, IDiscriminatorConvention discriminatorConvention)

Parameters

derivedTypes IDerivedTypes

The IDerivedTypes system for knowing which types are derived types.

discriminatorConvention IDiscriminatorConvention

The MongoDB.Bson.Serialization.Conventions.IDiscriminatorConvention to register for derived types.

Remarks

The target types (interfaces and base classes) get the convention registered up front, but the driver resolves the discriminator convention per CLASS MAP when delegating from a discriminated interface serializer to the concrete type's serializer — and it passes the original (interface) nominal type along. Without this registration the concrete type's class map falls back to the driver's default "_t" convention, which cannot see the "_derivedTypeId" element and answers with the interface nominal type, bouncing deserialization back to the discriminated interface serializer in an unbounded loop that overflows the stack. Registering the same convention for the concrete types keeps both sides symmetric: writes emit "_derivedTypeId" and the re-check resolves to the type itself, terminating the delegation.

Methods

Apply(BsonClassMap)

Applies a modification to the class map.

public void Apply(BsonClassMap classMap)

Parameters

classMap BsonClassMap

The class map.