/// <summary>
/// Adds the composition metadata.
/// </summary>
/// <param name="builder">The builder.</param>
/// <param name="attributeTypes">The attribute types.</param>
private void AddCompositionMetadata(IExportConventionsBuilder builder, Type[] attributeTypes)
{
if (attributeTypes == null || attributeTypes.Length == 0)
{
return;
}
foreach (var attributeType in attributeTypes)
{
var attrType = attributeType;
builder.AddMetadata(
this.GetMetadataNameFromAttributeType(attributeType),
t => this.GetMetadataValueFromAttribute(t, attrType));
}
}
/// <summary>
/// Configures the export.
/// </summary>
/// <param name="serviceContract">The service contract.</param>
/// <param name="exportBuilder">The export builder.</param>
/// <param name="exportedContractType">Type of the exported contract.</param>
/// <param name="metadataAttributes">The metadata attributes.</param>
private void ConfigureExport(TypeInfo serviceContract, IExportConventionsBuilder exportBuilder, Type exportedContractType, Type[] metadataAttributes)
{
exportBuilder.AsContractType(exportedContractType);
this.AddCompositionMetadata(exportBuilder, metadataAttributes);
this.AddCompositionMetadataForGenerics(exportBuilder, serviceContract);
}
/// <summary>
/// Adds the composition metadata.
/// </summary>
/// <param name="builder">The builder.</param>
/// <param name="serviceContract">The service contract.</param>
private void AddCompositionMetadataForGenerics(IExportConventionsBuilder builder, TypeInfo serviceContract)
{
if (!serviceContract.IsGenericTypeDefinition)
{
return;
}
var serviceContractType = serviceContract.AsType();
var genericTypeParameters = serviceContract.GenericTypeParameters;
for (var i = 0; i < genericTypeParameters.Length; i++)
{
var genericTypeParameter = genericTypeParameters[i];
var position = i;
builder.AddMetadata(
this.GetMetadataNameFromGenericTypeParameter(genericTypeParameter),
t => this.GetMetadataValueFromGenericParameter(t, position, serviceContractType));
}
}
/// <summary>
/// Adds the composition metadata.
/// </summary>
/// <param name="builder">The builder.</param>
/// <param name="serviceImplementationType">Type of the service implementation.</param>
/// <param name="attributeTypes">The attribute types.</param>
private void AddCompositionMetadata(IExportConventionsBuilder builder, Type serviceImplementationType, Type[] attributeTypes)
{
// add the service type.
builder.AddMetadata(nameof(AppServiceMetadata.AppServiceImplementationType), t => serviceImplementationType ?? t ?? typeof(Undefined));
// add the rest of the metadata indicated by the attributes.
if (attributeTypes == null || attributeTypes.Length == 0)
{
return;
}
foreach (var attributeType in attributeTypes)
{
var attrType = attributeType;
builder.AddMetadata(
GetMetadataNameFromAttributeType(attrType),
t => GetMetadataValueFromAttribute(t, attrType));
}
}
