Class MessageProviderFactoryStrategyProvider

A strategy-selector/factory class which gets the appropriate strategy implementation for getting a failure message provider implementation for a specified message provider type and rule interface.

Inheritance

System.Object

MessageProviderFactoryStrategyProvider

Implements

IGetsMessageProviderFactoryStrategy

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: CSF.Validation.Messages

Assembly: CSF.Validation.dll

Syntax

public class MessageProviderFactoryStrategyProvider : IGetsMessageProviderFactoryStrategy

Constructors

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MessageProviderFactoryStrategyProvider(IServiceProvider)

Initialises a new instance of MessageProviderFactoryStrategyProvider.

Declaration

public MessageProviderFactoryStrategyProvider(IServiceProvider serviceProvider)

Parameters

Type	Name	Description
System.IServiceProvider	serviceProvider	A service provider.

Exceptions

Type	Condition
System.ArgumentNullException	If the `serviceProvider` is null.

Methods

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GetMessageProviderFactory(MessageProviderTypeInfo, Type)

Gets a message provider factory which is appropriate for the specified provider type and rule interface.

Declaration

public IGetsNonGenericMessageProvider GetMessageProviderFactory(MessageProviderTypeInfo messageProviderTypeInfo, Type ruleInterface)

Parameters

Type	Name	Description
MessageProviderTypeInfo	messageProviderTypeInfo	The candidate message provider type.
System.Type	ruleInterface	The interface used for the validation rule.

Returns

Type	Description
IGetsNonGenericMessageProvider

Remarks

This method will examine the message provider interfaces which are implemented by the ProviderTypeInfo of the messageProviderTypeInfo. Specifically it will consider all implementations of any of:

It will then return a message-provider-factory strategy implementation which best-matches the interfaces indicated by the messageProviderTypeInfo, based upon the actual validation rule interface which is in-use: ruleInterface.

This 'matching' process will look for matches in the order the message provider interfaces are listed above. For example, if a message provider implements the interface with two generic types, and for types that are compatible with the generic types present upon the rule interface, then the double-generic strategy will be given preference over a single-generic strategy. This is true even if the message provider type also implements a single-generic message provider interface that is compatible with the rule interface.

Obviously, if the message provider type implements the non-generic IGetsFailureMessage then this will match every possible rule interface, as it is non-generic. This behaviour may be leveraged as a fall-back option for unexpected scenarios (such as validating Errored results).

If this method cannot find any suitable strategy for getting a message provider - the provider type indicated by messageProviderTypeInfo does not implement any interface which is compatible with the ruleInterface - then it will return null. This means that no factory strategy is applicable and that the provider type is not compatible with the rule interface.

Exceptions

Type	Condition
System.ArgumentNullException	If any parameter is null.

Implements

IGetsMessageProviderFactoryStrategy