/// <summary>
/// These settings are only applicable for collection types when they are serialized not as a member (root or LateReference)
/// </summary>
public void SetNestedSettingsWhenRoot(MemberLevelSettingsValue value, int level)
{
if (level == 0)
{
throw new ArgumentOutOfRangeException(nameof(level), "Zero level settings should be specified through DefaultX properties on MetaType");
}
ThrowIfFrozen();
Helpers.MemoryBarrier();
_rootNestedVs.SetSettings(value, level);
}
internal MetaType(RuntimeTypeModel model, Type type, MethodInfo factory)
{
this._factory = factory;
if (model == null)
{
throw new ArgumentNullException(nameof(model));
}
if (type == null)
{
throw new ArgumentNullException(nameof(type));
}
this._model = model;
IProtoSerializer coreSerializer = model.TryGetBasicTypeSerializer(type);
if (coreSerializer != null)
{
throw InbuiltType(type);
}
this.Type = type;
#if WINRT
this._typeInfo = type.GetTypeInfo();
#endif
MemberInfo[] members;
_tupleCtor = ResolveTupleConstructor(Type, out members);
if (_tupleCtor != null)
{
foreach (MemberInfo memberInfo in members)
{
var level = new MemberLevelSettingsValue();
var vs = new ValueSerializationSettings();
vs.SetSettings(new ValueSerializationSettings.LevelValue(level)
{
IsNotAssignable = true
}, 0);
vs.DefaultLevel = new ValueSerializationSettings.LevelValue(level.MakeDefaultNestedLevel());
var main = new MemberMainSettingsValue()
{
Name = memberInfo.Name
};
var vm = new ValueMember(main, vs, memberInfo, Type, model, canHaveDefaultValue: false, isAccessHandledOutside: true);
AddTupleField(vm);
}
}
}
IProtoSerializerWithWireType BuildSerializer()
{
if (_serializer != null)
{
return(_serializer);
}
int opaqueToken = 0;
try
{
// this lock is for whole model, not just this value member
// so it should be taken anyway, right?
_model.TakeLock(ref opaqueToken); // check nobody is still adding this type
if (_serializer != null)
{
return(_serializer); // double check
}
FinalizingSettings?.Invoke(this, new FinalizingSettingsArgs(this));
if (FieldNumber < 1 && !Helpers.IsEnum(ParentType) && !_isAccessHandledOutside)
{
throw new ProtoException("FieldNumber < 1 for member " + Member);
}
if (Helpers.IsNullOrEmpty(_main.Name))
{
_main.Name = Member.Name;
}
_vsFinal = _vsByClient.Clone();
var level0 = _vsFinal.GetSettingsCopy(0);
if (level0.Basic.EffectiveType == null)
{
level0.Basic.EffectiveType = MemberType;
}
if (!level0.IsNotAssignable)
{
level0.IsNotAssignable = !Helpers.CanWrite(_model, Member);
}
_vsFinal.SetSettings(level0, 0);
if (_vsFinal.DefaultValue != null && _getSpecified != null)
{
throw new ProtoException("Can't use default value \"" + _vsFinal.DefaultValue + "\" on member with *Specified or ShouldSerialize check " + Member);
}
if (_vsFinal.DefaultValue != null && IsRequired)
{
throw new ProtoException("Can't use default value \"" + _vsFinal.DefaultValue + "\" on Required member " + Member);
}
if (_getSpecified == null && !IsRequired && _vsFinal.DefaultValue == null)
{
if (_model.UseImplicitZeroDefaults)
{
switch (Helpers.GetTypeCode(MemberType))
{
case ProtoTypeCode.Boolean:
_vsFinal.DefaultValue = false;
break;
case ProtoTypeCode.Decimal:
_vsFinal.DefaultValue = (decimal)0;
break;
case ProtoTypeCode.Single:
_vsFinal.DefaultValue = (float)0;
break;
case ProtoTypeCode.Double:
_vsFinal.DefaultValue = (double)0;
break;
case ProtoTypeCode.Byte:
_vsFinal.DefaultValue = (byte)0;
break;
case ProtoTypeCode.Char:
_vsFinal.DefaultValue = (char)0;
break;
case ProtoTypeCode.Int16:
_vsFinal.DefaultValue = (short)0;
break;
case ProtoTypeCode.Int32:
_vsFinal.DefaultValue = (int)0;
break;
case ProtoTypeCode.Int64:
_vsFinal.DefaultValue = (long)0;
break;
case ProtoTypeCode.SByte:
_vsFinal.DefaultValue = (sbyte)0;
break;
case ProtoTypeCode.UInt16:
_vsFinal.DefaultValue = (ushort)0;
break;
case ProtoTypeCode.UInt32:
_vsFinal.DefaultValue = (uint)0;
break;
case ProtoTypeCode.UInt64:
_vsFinal.DefaultValue = (ulong)0;
break;
case ProtoTypeCode.TimeSpan:
_vsFinal.DefaultValue = TimeSpan.Zero;
break;
case ProtoTypeCode.Guid:
_vsFinal.DefaultValue = Guid.Empty;
break;
}
}
}
#if !DEBUG
try
#endif
{
WireType wt;
var ser = _model.ValueSerializerBuilder.BuildValueFinalSerializer(
_vsFinal,
true,
out wt);
if (!_isAccessHandledOutside)
{
PropertyInfo prop = Member as PropertyInfo;
if (prop != null)
{
ser = new PropertyDecorator(_model, ParentType, (PropertyInfo)Member, ser);
}
else
{
FieldInfo fld = Member as FieldInfo;
if (fld != null)
{
ser = new FieldDecorator(ParentType, (FieldInfo)Member, ser);
}
else
{
throw new InvalidOperationException();
}
}
if (_getSpecified != null || _setSpecified != null)
{
ser = new MemberSpecifiedDecorator(_getSpecified, _setSpecified, ser);
}
}
_serializer = ser;
return(ser);
}
#if !DEBUG
catch (ProtoException ex)
{
throw new ProtoException(GetRethrowExceptionText(ex), ex);
}
catch (InvalidOperationException ex)
{
throw new InvalidOperationException(GetRethrowExceptionText(ex), ex);
}
catch (NotSupportedException ex)
{
throw new InvalidOperationException(GetRethrowExceptionText(ex), ex);
}
catch (NotImplementedException ex)
{
throw new NotImplementedException(GetRethrowExceptionText(ex), ex);
}
catch (ArgumentNullException ex)
{
throw new ArgumentNullException(GetRethrowExceptionText(ex), ex);
}
catch (ArgumentOutOfRangeException ex)
{
throw new ArgumentOutOfRangeException(GetRethrowExceptionText(ex), ex);
}
catch (ArgumentException ex)
{
#if SILVERLIGHT || PORTABLE
throw new ArgumentException(GetRethrowExceptionText(ex), ex);
#else
throw new ArgumentException(GetRethrowExceptionText(ex), ex.ParamName, ex);
#endif
}
catch (System.MissingMemberException ex)
{
throw new System.MissingMemberException(GetRethrowExceptionText(ex), ex);
}
catch (MemberAccessException ex)
{
throw new MemberAccessException(GetRethrowExceptionText(ex), ex);
}
catch (Exception ex)
{
throw new ProtoException(GetRethrowExceptionText(ex), ex);
}
#endif
}
finally
{
_model.ReleaseLock(opaqueToken);
}
}
ValueSerializationSettings.LevelValue CompleteLevel(ValueSerializationSettings vs, int levelNr, out object defaultValue)
{
var lv = vs.GetSettingsCopy(levelNr);
var level = lv.Basic; // do not use lv.Basic, it's overwritten at the end of this method
var originalLevel = level;
if (levelNr == 0)
{
//#if WINRT
if (vs.DefaultValue != null && _model.MapType(vs.DefaultValue.GetType()) != level.EffectiveType)
//#else
// if (defaultValue != null && !memberType.IsInstanceOfType(defaultValue))
//#endif
{
vs.DefaultValue = ParseDefaultValue(level.EffectiveType, vs.DefaultValue);
}
defaultValue = vs.DefaultValue;
}
else
{
defaultValue = null;
}
int idx = _model.FindOrAddAuto(level.EffectiveType, false, true, false);
MetaType effectiveMetaType = null;
if (idx >= 0)
{
effectiveMetaType = _model[idx];
var typeSettings = effectiveMetaType.GetFinalSettingsCopy();
level = MemberLevelSettingsValue.Merge(typeSettings.Member, level);
}
MemberDefaultsMode defaultsMode = level.DefaultsMode.GetValueOrDefault();
if (level.Format == ValueFormat.NotSpecified && defaultsMode == MemberDefaultsMode.Legacy)
{
level.Format = GetDefaultLegacyFormat(level.EffectiveType, _model);
}
if (level.Format == ValueFormat.LateReference)
{
if (vs.MaxSpecifiedNestedLevel > levelNr)
{
throw new ProtoException("LateReference member levels can't have nested levels");
}
var defaultSettings = effectiveMetaType?.GetFinalSettingsCopy().Member ?? new MemberLevelSettingsValue().GetInitializedToValueOrDefault();
if (level.ContentBinaryFormatHint.GetValueOrDefault() != defaultSettings.ContentBinaryFormatHint.GetValueOrDefault() ||
level.WriteAsDynamicType.GetValueOrDefault() != defaultSettings.WriteAsDynamicType.GetValueOrDefault() ||
level.Collection.Append.GetValueOrDefault() != defaultSettings.Collection.Append.GetValueOrDefault() ||
level.Collection.PackedWireTypeForRead != defaultSettings.Collection.PackedWireTypeForRead)
{
throw new ProtoException("LateReference member levels can't override default member settings specified on MetaType");
}
}
Type newCollectionConcreteType = null;
Type newItemType = null;
if (!effectiveMetaType?.GetFinalSettingsCopy().IgnoreListHandling ?? true)
{
MetaType.ResolveListTypes(_model, level.EffectiveType, ref newItemType, ref newCollectionConcreteType);
}
// tuples depend on collection
if (defaultsMode == MemberDefaultsMode.LegacyTuple && level.Format == ValueFormat.NotSpecified && newItemType != null)
{
level.Format = ValueFormat.Compact;
}
EnsureCorrectFormatSpecified(_model, ref level.Format, level.EffectiveType, ref level.WriteAsDynamicType, true);
#region Collections
{
if (effectiveMetaType?.GetFinalSettingsCopy().IgnoreListHandling ?? false)
{
ResetCollectionSettings(ref level);
}
else
{
// defaults for ItemType and others were already merged from type settings
if (level.Collection.ItemType != null)
{
if (level.Format == ValueFormat.LateReference)
{
Type defaultItemType = (effectiveMetaType?.GetFinalSettingsCopy().Member.Collection.ItemType ?? newItemType);
if (level.Collection.ItemType != defaultItemType)
{
throw new ProtoException("LateReference member settings level should have default collection item type (" + defaultItemType + ")");
}
}
}
else
{
level.Collection.ItemType = newItemType;
}
if (level.Collection.ItemType == null)
{
ResetCollectionSettings(ref level);
}
else
{
// should not override with default because: what if specified something like List<string> for IList?
if (level.Collection.ConcreteType != null)
{
if (!Helpers.IsAssignableFrom(level.EffectiveType, level.Collection.ConcreteType))
{
throw new ProtoException(
"Specified CollectionConcreteType " + level.Collection.ConcreteType.Name + " is not assignable to " + level.EffectiveType);
}
if (level.Format == ValueFormat.LateReference)
{
Type defaultConcreteType = (effectiveMetaType?.GetFinalSettingsCopy().Member.Collection.ConcreteType ?? newCollectionConcreteType);
if (level.Collection.ConcreteType != defaultConcreteType)
{
throw new ProtoException("LateReference member settings level should have default collection concrete type (" + defaultConcreteType + ")");
}
}
}
else
{
level.Collection.ConcreteType = newCollectionConcreteType;
}
if (!level.Collection.Append.GetValueOrDefault() && lv.IsNotAssignable)
{
if (level.Collection.Append == null)
{
level.Collection.Append = true;
}
else
{
throw new ProtoException("The property is not writable but AppendCollection was set to false");
}
}
if (!CanPack(level.Collection.ItemType, level.ContentBinaryFormatHint))
{
if (level.Collection.PackedWireTypeForRead != null && level.Collection.PackedWireTypeForRead != WireType.None)
{
throw new ProtoException("PackedWireTypeForRead " + level.Collection.PackedWireTypeForRead + " specified but type can't be packed");
}
level.Collection.PackedWireTypeForRead = WireType.None;
}
if (level.Collection.Format == CollectionFormat.NotSpecified)
{
level.Collection.Format = !_model.ProtoCompatibility.SuppressCollectionEnhancedFormat
? CollectionFormat.Enhanced
: CollectionFormat.Protobuf;
}
else if (level.Collection.Format == CollectionFormat.Enhanced && _model.ProtoCompatibility.SuppressCollectionEnhancedFormat)
{
level.Collection.Format = CollectionFormat.Protobuf;
}
}
}
if (!level.EffectiveType.IsArray)
{
if (level.Collection.ArrayLengthReadLimit != null)
{
throw new ProtoException("ArrayLengthReadLimit specified for non-array");
}
}
else if (level.Collection.ArrayLengthReadLimit == null)
{
level.Collection.ArrayLengthReadLimit = TypeModel.DefaultArrayLengthReadLimit;
}
else if (level.Collection.ArrayLengthReadLimit <= 0)
{
throw new ProtoException("ArrayLengthReadLimit should be greater than zero or not specified");
}
}
#endregion
lv.Basic = level.GetInitializedToValueOrDefault();
vs.SetSettings(lv, levelNr);
originalLevel.GetHashCode();
return(lv);
}
IProtoSerializerWithWireType BuildValueFinalSerializer(ValueSerializationSettings settings, bool isMemberOrNested, out WireType wireType, int levelNumber)
{
object defaultValue;
var l = CompleteLevel(settings, levelNumber, out defaultValue).Basic;
// to ensure that model can be copied and used again
for (int i = 1; i <= 3; i++)
{
var l2 = CompleteLevel(settings, levelNumber, out defaultValue);
Debug.Assert(l.Equals(l2.Basic));
}
Debug.Assert(l.ContentBinaryFormatHint != null, "l.ContentBinaryFormatHint != null");
Debug.Assert(l.WriteAsDynamicType != null, "l.WriteAsDynamicType != null");
Debug.Assert(l.Collection.Append != null, "l.Collection.Append != null");
// postpone all checks for types when adding member till BuildSerializer, resolve everything only on buildserializer! till that have only local not inherited settings.
// do not allow EnumPassthru and other settings to affect anything until buildling serializer
wireType = 0;
Type itemType = l.Collection.ItemType ?? l.EffectiveType;
bool itemTypeCanBeNull = CanTypeBeNull(itemType);
bool isPacked = CanBePackedCollection(l);
IProtoSerializerWithWireType ser = null;
if (l.Collection.IsCollection)
{
Type nestedItemType = null;
Type nestedDefaultType = null;
int idx = _model.FindOrAddAuto(itemType, false, true, false);
MetaType type = idx < 0 ? null : _model[itemType];
if (!type?.GetFinalSettingsCopy().IgnoreListHandling ?? true)
{
MetaType.ResolveListTypes(_model, itemType, ref nestedItemType, ref nestedDefaultType);
}
bool itemIsNestedCollection = nestedItemType != null;
// primitive types except System.Object may be handled as nested through recursion
bool tryHandleAsRegistered = !isMemberOrNested || itemType == _model.MapType(typeof(object));
if (tryHandleAsRegistered)
{
var nestedLevel = settings.GetSettingsCopy(levelNumber + 1);
nestedLevel = PrepareNestedLevelForBuild(nestedLevel, itemType);
settings.SetSettings(nestedLevel, levelNumber + 1);
// should use its level settings and merge from type, ...
ser = BuildValueFinalSerializer(settings, true, out wireType, levelNumber + 1);
//object dummy = null;
//ser = TryGetCoreSerializer(l.ContentBinaryFormatHint.Value, nestedLevel.Basic.EffectiveType, out wireType, ref nestedLevel.Basic.Format, nestedLevel.Basic.WriteAsDynamicType.GetValueOrDefault(), l.Collection.Append.Value, isPacked, true, ref dummy);
//if (ser != null)
// ThrowIfHasMoreLevels(settings, levelNumber + 1, l, ", no more nested type detected");
}
else if (!itemIsNestedCollection)
{
var nestedLevel = settings.GetSettingsCopy(levelNumber + 1);
nestedLevel = PrepareNestedLevelForBuild(nestedLevel, itemType);
nestedLevel.Basic.Collection.ItemType = null; // IgnoreListHandling or not a collection
settings.SetSettings(nestedLevel, levelNumber + 1);
ser = BuildValueFinalSerializer(settings, true, out wireType, levelNumber + 1);
}
if (ser == null && itemIsNestedCollection)
{
// if we already tried to lookup registered type no need to do it again
MetaType metaType;
if (_model.FindOrAddAuto(itemType, false, true, false, out metaType) >= 0)
{
nestedDefaultType = metaType.GetFinalSettingsCopy().ConstructType ?? nestedDefaultType ?? metaType.Type;
}
var nestedLevel = settings.GetSettingsCopy(levelNumber + 1);
if (nestedLevel.Basic.Collection.ConcreteType == null)
{
nestedLevel.Basic.Collection.ConcreteType = nestedDefaultType;
}
if (nestedLevel.IsNotAssignable)
{
throw new ProtoException("Nested collection item should be assignable");
}
nestedLevel.Basic.Collection.Append = false;
// TODO throw if set to true: throw new ProtoException("AppendCollection is not supported for nested types: " + objectType.Name);
if (nestedLevel.Basic.Collection.ItemType == null)
{
nestedLevel.Basic.Collection.ItemType = nestedItemType;
}
else if (!Helpers.IsAssignableFrom(nestedItemType, nestedLevel.Basic.Collection.ItemType))
{
throw new ProtoException(
"Nested collection item type " + nestedLevel.Basic.Collection.ItemType + " is not assignable to " + nestedItemType + " for declared collection type " +
l.EffectiveType);
}
nestedLevel = PrepareNestedLevelForBuild(nestedLevel, itemType);
settings.SetSettings(nestedLevel, levelNumber + 1);
WireType wt;
ser = BuildValueFinalSerializer(
settings,
true,
out wt,
levelNumber + 1);
isPacked = false;
}
}
else
{
// handled outside and not wrapped with collection
if (!isMemberOrNested)
{
l.Format = ValueFormat.Compact;
}
isPacked = false; // it's not even a collection
ser = TryGetCoreSerializer(l.ContentBinaryFormatHint.Value, itemType, out wireType, ref l.Format, l.WriteAsDynamicType.Value, l.Collection.Append.Value, isPacked, true, ref defaultValue);
if (ser != null)
{
ThrowIfHasMoreLevels(settings, levelNumber, l, ", no more nested type detected");
}
}
if (ser == null)
{
throw new InvalidOperationException("No serializer defined for type: " + itemType.FullName);
}
if (itemTypeCanBeNull &&
(
(Helpers.GetNullableUnderlyingType(itemType) != null && Helpers.GetNullableUnderlyingType(ser.ExpectedType) == null)
// TODO get rid of ugly casting, maybe use builder pattern
|| (!Helpers.IsValueType(itemType) && !(ser is NetObjectValueDecorator))
))
{
// nested level may be not collection and already wrapped with nonull, may later add check whether handled as registered vs as nested
if (!(ser is NoNullDecorator))
{
// if not wrapped with net obj - wrap with write-null check
ser = new NoNullDecorator(_model, ser, l.Collection.ItemType != null); // throw only for collection elements, otherwise don't write
}
}
if (itemType != ser.ExpectedType && (!l.WriteAsDynamicType.Value || !Helpers.IsAssignableFrom(ser.ExpectedType, itemType)))
{
throw new ProtoException(string.Format("Wrong type in the tail; expected {0}, received {1}", ser.ExpectedType, itemType));
}
// apply lists if appropriate
if (l.Collection.IsCollection)
{
bool protoCompatibility = l.Collection.Format == CollectionFormat.Protobuf || l.Collection.Format == CollectionFormat.ProtobufNotPacked;
WireType packedReadWt;
if (!protoCompatibility)
{
packedReadWt = WireType.None;
Debug.Assert(!isPacked); // should be determinated before passing to TryGetCoreSerializer
isPacked = false;
}
else
{
packedReadWt = CanPack(l.Collection.ItemType, l.ContentBinaryFormatHint)
? l.Collection.PackedWireTypeForRead.GetValueOrDefault(wireType)
: WireType.None;
}
if (l.EffectiveType.IsArray)
{
if (l.EffectiveType.GetArrayRank() == 1)
{
ser = new ArrayDecorator(
_model,
ser,
isPacked,
packedReadWt,
l.EffectiveType,
!l.Collection.Append.Value,
l.Collection.ArrayLengthReadLimit.Value,
protoCompatibility);
}
else
{
if (protoCompatibility)
{
throw new NotSupportedException("Multi-dimensional arrays are supported only in Enhanced collection format");
}
ser = new MultiDimensionalArrayDecorator(
_model,
ser,
l.EffectiveType,
!l.Collection.Append.Value,
l.Collection.ArrayLengthReadLimit.Value);
}
}
else
{
ser = ListDecorator.Create(
_model,
l.EffectiveType,
l.Collection.ConcreteType,
ser,
isPacked,
packedReadWt,
!l.Collection.Append.Value,
protoCompatibility,
true);
}
if (isMemberOrNested)
{
if (MetaType.IsNetObjectValueDecoratorNecessary(_model, l.Format))
{
ser = new NetObjectValueDecorator(
ser,
Helpers.GetNullableUnderlyingType(l.EffectiveType) != null,
l.Format == ValueFormat.Reference || l.Format == ValueFormat.LateReference,
l.Format == ValueFormat.LateReference && CanTypeBeAsLateReferenceOnBuildStage(_model.GetKey(l.EffectiveType, false, true), _model),
!_model.ProtoCompatibility.SuppressNullWireType,
_model);
}
else if (!Helpers.IsValueType(l.EffectiveType) || Helpers.GetNullableUnderlyingType(l.EffectiveType) != null)
{
ser = new NoNullDecorator(_model, ser, false);
}
}
if (l.EffectiveType != ser.ExpectedType && (!l.WriteAsDynamicType.Value || !Helpers.IsAssignableFrom(ser.ExpectedType, itemType)))
{
throw new ProtoException(string.Format("Wrong type in the tail; expected {0}, received {1}", ser.ExpectedType, itemType));
}
}
if (levelNumber == 0 && defaultValue != null)
{
ser = new DefaultValueDecorator(_model, defaultValue, ser);
}
return(ser);
}
private ValueMember AddField(int fieldNumber, string memberName, Type itemType, Type defaultType, object defaultValue)
{
if (Type.IsArray)
{
throw new InvalidOperationException("Can't add fields to array type");
}
MemberInfo mi = null;
#if WINRT
mi = Helpers.IsEnum(Type) ? Type.GetTypeInfo().GetDeclaredField(memberName) : Helpers.GetInstanceMember(Type.GetTypeInfo(), memberName);
#else
MemberInfo[] members = Type.GetMember(memberName, Helpers.IsEnum(Type) ? BindingFlags.Static | BindingFlags.Public : BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
if (members != null && members.Length == 1)
{
mi = members[0];
}
#endif
if (mi == null)
{
throw new ArgumentException("Unable to determine member: " + memberName, nameof(memberName));
}
Type miType;
#if WINRT || PORTABLE
PropertyInfo pi = mi as PropertyInfo;
if (pi == null)
{
FieldInfo fi = mi as FieldInfo;
if (fi == null)
{
throw new NotSupportedException(mi.GetType().Name);
}
else
{
miType = fi.FieldType;
}
}
else
{
miType = pi.PropertyType;
}
#else
switch (mi.MemberType)
{
case MemberTypes.Field:
miType = ((FieldInfo)mi).FieldType; break;
case MemberTypes.Property:
miType = ((PropertyInfo)mi).PropertyType; break;
default:
throw new NotSupportedException(mi.MemberType.ToString());
}
#endif
// we can't check IgnoreListHandling (because of recursion when adding type) but we don't need to
// it will be checked in ValueSerializedBuilder.CompleteLevel stage
ResolveListTypes(_model, miType, ref itemType, ref defaultType);
var serializationSettings = new ValueSerializationSettings();
var memberSettings = new MemberMainSettingsValue {
Tag = fieldNumber
};
var level0 = serializationSettings.GetSettingsCopy(0).Basic;
level0.Collection.ConcreteType = defaultType;
level0.Collection.ItemType = itemType;
serializationSettings.SetSettings(level0, 0);
serializationSettings.DefaultValue = defaultValue;
var def = serializationSettings.DefaultLevel.GetValueOrDefault();
def.Basic = level0.MakeDefaultNestedLevel();
serializationSettings.DefaultLevel = def;
ValueMember newField = new ValueMember(memberSettings, serializationSettings, mi, Type, _model);
Add(newField);
return(newField);
}