CompositionContract MapExportedContract(ExportDefinition export, Func <string, Type> typeNameResolver)
{
object typeId;
if (!export.Metadata.TryGetValue(CompositionConstants.ExportTypeIdentityMetadataName, out typeId) ||
!(typeId is string))
{
throw new NotSupportedException("Only typed exports are supported.");
}
var contractType = typeNameResolver(PrimitiveAdaptation.ParseTypeIdentity((string)typeId));
var contractName = export.ContractName.Equals(typeId) ? null : export.ContractName;
return(new CompositionContract(contractType, contractName));
}
CompositionContract ImportDefinitionToContract(ContractBasedImportDefinition cbid)
{
var typeId = cbid.RequiredTypeIdentity;
if (typeId == null)
{
throw new CompositionFailedException("Dynamic or 'object' imports are not supported'.");
}
var contractType = _typeNameResolver(PrimitiveAdaptation.ParseTypeIdentity(typeId));
var contractName = cbid.ContractName.Equals(typeId) ? null : cbid.ContractName;
if (cbid.RequiredCreationPolicy != CreationPolicy.Any)
{
throw new CompositionFailedException("Required creation policy cannot be specified.");
}
// Required metadata is ignored; we will let the primitives fail later.
return(new CompositionContract(contractType, contractName));
}