/// <summary>
/// Recupera o nome do contrato do <see cref="MemberInfo"/> e <see cref="ExportDescription"/>.
/// </summary>
/// <param name="memberGetter">Informações sobre o membro.</param>
/// <param name="exportDescription">Informações sobre a definição de export.</param>
/// <returns>Nome do contrato.</returns>
public static string GetContractNameFromExportDescription(Func <MemberInfo> memberGetter, ExportDescription exportDescription)
{
memberGetter.Require("member").NotNull();
exportDescription.Require("exportDescription").NotNull();
if (!string.IsNullOrEmpty(exportDescription.ContractName))
{
return(exportDescription.ContractName);
}
if (exportDescription.ContractTypeName != null)
{
return(exportDescription.ContractTypeName.FullName);
}
if (exportDescription.ContractType != null)
{
return(AttributedModelServices.GetContractName(exportDescription.ContractType));
}
var memberValue = memberGetter();
if (memberValue == null)
{
throw new InvalidOperationException("member is null");
}
if (memberValue.MemberType == MemberTypes.Method)
{
return(AttributedModelServices.GetTypeIdentity((MethodInfo)memberValue));
}
return(AttributedModelServices.GetContractName(memberValue.GetDefaultTypeFromMember()));
}
/// <summary>
///
/// </summary>
/// <param name="memberGetter"></param>
/// <param name="exportDescription"></param>
/// <param name="creationPolicy"></param>
/// <returns></returns>
public static IDictionary <string, object> GetMetadataFromExportDescription(Func <MemberInfo> memberGetter, ExportDescription exportDescription, CreationPolicy creationPolicy)
{
memberGetter.Require("member").NotNull();
exportDescription.Require("exportDescription").NotNull();
var metadata = new Dictionary <string, object>();
var contract = GetTypeIdentityFromExportDescription(memberGetter, exportDescription);
metadata.Add(System.ComponentModel.Composition.Hosting.CompositionConstants.ExportTypeIdentityMetadataName, contract);
if (creationPolicy != CreationPolicy.Any)
{
metadata.Add("System.ComponentModel.Composition.CreationPolicy", creationPolicy);
}
if (exportDescription.Metadata != null)
{
foreach (var pair in exportDescription.Metadata)
{
metadata.Add(pair.Key, pair.Value);
}
}
return(metadata);
}
/// <summary>
/// Construtor padrão.
/// </summary>
/// <param name="memberGetter">Referencia do método usado para recuperar o membro.</param>
/// <param name="exportDescription"></param>
/// <param name="creationPolicy">Política de criação.</param>
public ProviderExportDefinition(Func <System.Reflection.MemberInfo> memberGetter, ExportDescription exportDescription, System.ComponentModel.Composition.CreationPolicy creationPolicy) : base(CompositionServices.GetContractNameFromExportDescription(memberGetter, exportDescription), CompositionServices.GetMetadataFromExportDescription(memberGetter, exportDescription, creationPolicy))
{
memberGetter.Require("member").NotNull();
exportDescription.Require("exportDescription").NotNull();
_memberGetter = memberGetter;
}
