Class CompositionHelper

A composition helper.

Inheritance

System.Object

CompositionHelper

Inherited Members

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.ToString()

Namespace: Kephas.Composition

Assembly: Kephas.Core.dll

Syntax

public static class CompositionHelper

Methods

ToPrioritizedDictionary<TService, TServiceMetadata, TKey>(IEnumerable<IExportFactory<TService, TServiceMetadata>>, Func<IExportFactory<TService, TServiceMetadata>, TKey>, IEqualityComparer<TKey>)

Converts this collection of service factories to a dictionary.

Declaration

public static IDictionary<TKey, IExportFactory<TService, TServiceMetadata>> ToPrioritizedDictionary<TService, TServiceMetadata, TKey>(this IEnumerable<IExportFactory<TService, TServiceMetadata>> serviceFactories, Func<IExportFactory<TService, TServiceMetadata>, TKey> keyFunc, IEqualityComparer<TKey> keyComparer = null)

    where TServiceMetadata : AppServiceMetadata

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<IExportFactory<TService, TServiceMetadata>>	serviceFactories	The service factories.
System.Func<IExportFactory<TService, TServiceMetadata>, TKey>	keyFunc	The key function.
System.Collections.Generic.IEqualityComparer<TKey>	keyComparer	Optional. The key comparer.

Returns

Type	Description
System.Collections.Generic.IDictionary<TKey, IExportFactory<TService, TServiceMetadata>>	The given data converted to an IDictionary<TKey,TValue>.

Type Parameters

Name	Description
TService	Type of the service.
TServiceMetadata	Type of the service metadata.
TKey	Type of the key.

Remarks

If, for the same key, there are multiple matching services, their override priority and processing priority is considered, in this order. Further, if both of these priorities are equal, then a DuplicateKeyException occurs.

ToPrioritizedDictionary<TService, TServiceMetadata, TKey, TValue>(IEnumerable<IExportFactory<TService, TServiceMetadata>>, Func<IExportFactory<TService, TServiceMetadata>, TKey>, Func<IExportFactory<TService, TServiceMetadata>, TValue>, IEqualityComparer<TKey>)

Converts this collection of service factories to a dictionary.

Declaration

public static IDictionary<TKey, TValue> ToPrioritizedDictionary<TService, TServiceMetadata, TKey, TValue>(this IEnumerable<IExportFactory<TService, TServiceMetadata>> serviceFactories, Func<IExportFactory<TService, TServiceMetadata>, TKey> keyFunc, Func<IExportFactory<TService, TServiceMetadata>, TValue> valueFunc, IEqualityComparer<TKey> keyComparer = null)

    where TServiceMetadata : AppServiceMetadata

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<IExportFactory<TService, TServiceMetadata>>	serviceFactories	The service factories.
System.Func<IExportFactory<TService, TServiceMetadata>, TKey>	keyFunc	The key function.
System.Func<IExportFactory<TService, TServiceMetadata>, TValue>	valueFunc	The value function.
System.Collections.Generic.IEqualityComparer<TKey>	keyComparer	Optional. The key comparer.

Returns

Type	Description
System.Collections.Generic.IDictionary<TKey, TValue>	The given data converted to a IDictionary<TKey,TValue>.

Type Parameters

Name	Description
TService	Type of the service.
TServiceMetadata	Type of the service metadata.
TKey	Type of the dictionary key.
TValue	Type of the dictionary value.

Remarks

If, for the same key, there are multiple matching services, their override priority and processing priority is considered, in this order. Further, if both of these priorities are equal, then a DuplicateKeyException occurs.

Exceptions

Type	Condition
DuplicateKeyException	Thrown when a Duplicate Key error condition occurs.