/// <summary>
/// Loads exported types from a given assembly
/// </summary>
/// <param name="assembly">The assembly to search for exported types</param>
/// <param name="signedOnly">Only load exported types from this assembly if the assembly has been digitally signed</param>
/// <param name="actionIfUnsigned">If only signed assemblies should be loaded, and this assembly is not signed, load
/// exported types nonetheless if this action returns true</param>
public static void LoadExports(Assembly assembly, bool signedOnly = false, Func <Assembly, bool> actionIfUnsigned = null)
{
if (signedOnly)
{
try
{
X509Certificate.CreateFromSignedFile(assembly.Location);
}
catch (CryptographicException e)
{
if (actionIfUnsigned == null || !actionIfUnsigned(assembly))
{
return;
}
}
}
foreach (var type in assembly.GetExportedTypes())
{
var custom = type.GetCustomAttributes();
foreach (var attrib in custom)
{
switch (attrib)
{
case ExportAttribute ea:
ExportedTypes.Add(new ExportedType(type, ea.ExportedType, false));
break;
case ExportManyAttribute ema:
ExportedTypes.Add(new ExportedType(type, ema.ExportedType, true));
break;
}
}
}
}
public static void AddExportedType(Type actualType, Type exportedAsType, bool exportMany = false)
{
if (ExportedTypes.Any(x => x.ExposedType == exportedAsType))
{
throw new Exception($"Type {exportedAsType.FullName} has already been exported");
}
ExportedTypes.Add(new ExportedType(actualType, exportedAsType, exportMany));
}