private static object CreateInstance(Type type)
{
var typeInfo = type.GetTypeInfo();
if (typeInfo.IsInterface || typeInfo.IsAbstract)
{
throw new InvalidOperationException(Resources.FormatError_CannotActivateAbstractOrInterface(type));
}
if (typeInfo.IsArray)
{
if (typeInfo.GetArrayRank() > 1)
{
throw new InvalidOperationException(Resources.FormatError_UnsupportedMultidimensionalArray(type));
}
return(Array.CreateInstance(typeInfo.GetElementType(), 0));
}
var hasDefaultConstructor = typeInfo.DeclaredConstructors.Any(ctor => ctor.IsPublic && ctor.GetParameters().Length == 0);
if (!hasDefaultConstructor)
{
throw new InvalidOperationException(Resources.FormatError_MissingParameterlessConstructor(type));
}
try
{
return(Activator.CreateInstance(type));
}
catch (Exception ex)
{
throw new InvalidOperationException(Resources.FormatError_FailedToActivate(type), ex);
}
}
private static object BindInstance(Type type, object instance, IConfiguration config)
{
var section = config as IConfigurationSection;
var configValue = section?.Value;
if (configValue != null)
{
// Leaf nodes are always reinitialized
return(ReadValue(type, configValue, section));
}
else
{
if (config.GetChildren().Count() != 0)
{
if (instance == null)
{
var typeInfo = type.GetTypeInfo();
if (typeInfo.IsInterface || typeInfo.IsAbstract)
{
throw new InvalidOperationException(Resources.FormatError_CannotActivateAbstractOrInterface(type));
}
var hasDefaultConstructor = typeInfo.DeclaredConstructors.Any(ctor => ctor.IsPublic && ctor.GetParameters().Length == 0);
if (!hasDefaultConstructor)
{
throw new InvalidOperationException(Resources.FormatError_MissingParameterlessConstructor(type));
}
try
{
instance = Activator.CreateInstance(type);
}
catch (Exception ex)
{
throw new InvalidOperationException(Resources.FormatError_FailedToActivate(type), ex);
}
}
// See if its a Dictionary
var collectionInterface = FindOpenGenericInterface(typeof(IDictionary <,>), type);
if (collectionInterface != null)
{
BindDictionary(instance, collectionInterface, config);
}
else
{
// See if its an ICollection
collectionInterface = FindOpenGenericInterface(typeof(ICollection <>), type);
if (collectionInterface != null)
{
BindCollection(instance, collectionInterface, config);
}
// Something else
else
{
Bind(config, instance);
}
}
}
return(instance);
}
}
private static object BindType(Type type, object typeInstance, IConfiguration configuration)
{
var configValue = configuration.Get(null);
var typeInfo = type.GetTypeInfo();
if (configValue != null)
{
// Leaf nodes are always reinitialized
return(CreateValueFromConfiguration(type, configValue, configuration));
}
else
{
var subkeys = configuration.GetConfigurationSections();
if (subkeys.Count() != 0)
{
if (typeInstance == null)
{
if (typeInfo.IsInterface || typeInfo.IsAbstract)
{
throw new InvalidOperationException(Resources.FormatError_CannotActivateAbstractOrInterface(type));
}
bool hasParameterlessConstructor = typeInfo.DeclaredConstructors.Any(ctor => ctor.IsPublic && ctor.GetParameters().Length == 0);
if (!hasParameterlessConstructor)
{
throw new InvalidOperationException(Resources.FormatError_MissingParameterlessConstructor(type));
}
try
{
typeInstance = Activator.CreateInstance(type);
}
catch (Exception ex)
{
throw new InvalidOperationException(Resources.FormatError_FailedToActivate(type), ex);
}
}
var collectionInterface = GetGenericOpenInterfaceImplementation(typeof(IDictionary <,>), type);
if (collectionInterface != null)
{
// Dictionary
BindDictionary(typeInstance, collectionInterface, configuration);
}
else
{
collectionInterface = GetGenericOpenInterfaceImplementation(typeof(ICollection <>), type);
if (collectionInterface != null)
{
// ICollection
BindCollection(typeInstance, collectionInterface, configuration);
}
else
{
// Something else
BindObjectProperties(typeInstance, configuration);
}
}
}
return(typeInstance);
}
}
