internal void WriteXml(XmlWriter writer, object value, XmlMember member, XmlTypeContext typeContext)
{
XmlMember lastMember = currentMember;
XmlContract lastContract = currentContract;
currentMember = member;
currentContract = typeContext.Contract;
typeContext.WriteXml(writer, value, this);
currentMember = lastMember;
currentContract = lastContract;
}
internal object ReadXml(XmlReader reader, XmlMember member, XmlTypeContext typeContext)
{
XmlMember lastMember = currentMember;
XmlContract lastContract = currentContract;
currentMember = member;
currentContract = typeContext.Contract;
object value = typeContext.ReadXml(reader, this);
currentMember = lastMember;
currentContract = lastContract;
return(value);
}
private void SerializeBody(XmlWriter writer, object value, Type memberType, XmlMember member)
{
if (writer == null)
{
throw new ArgumentNullException("writer");
}
if (value == null)
{
WriteNull(writer, memberType, member);
}
else
{
XmlTypeContext typeContext = settings.GetTypeContext(memberType);
WriteXml(writer, value, member ?? typeContext.Contract.Root, typeContext);
}
}
private object Deserialize(XmlReader reader, Type valueType, XmlMember member)
{
if (reader == null)
{
throw new ArgumentNullException("reader");
}
if (valueType == null)
{
throw new ArgumentNullException("valueType");
}
if (initialState && reader.NodeType == XmlNodeType.None)
{
initialState = false;
while (reader.NodeType != XmlNodeType.Element)
{
if (!reader.Read())
{
return(null);
}
}
}
if (reader.NodeType == XmlNodeType.Element)
{
if (!ReadValueType(reader, ref valueType))
{
reader.Skip();
return(null);
}
}
XmlTypeContext typeInfo = settings.GetTypeContext(valueType);
if (member == null)
{
member = typeInfo.Contract.Root;
}
return(ReadXml(reader, member, typeInfo));
}
private XmlTypeContext CreateTypeContext(Type valueType, XmlTypeContext context)
{
IXmlConverter readConverter = null;
IXmlConverter writeConverter = null;
foreach (var converter in converters.Concat(DefaultConverters))
{
if (readConverter == null && converter.CanRead(valueType))
{
readConverter = converter;
if (writeConverter != null)
{
break;
}
}
if (writeConverter == null && converter.CanWrite(valueType))
{
writeConverter = converter;
if (readConverter != null)
{
break;
}
}
}
var contract = contractResolver.ResolveContract(valueType);
readConverter = GetConverter(contract, readConverter);
writeConverter = GetConverter(contract, writeConverter);
context = new XmlTypeContext(contract, readConverter, writeConverter);
typeContextCache.TryAdd(valueType, context);
return(context);
}
internal void WriteElement(XmlWriter writer, object value, XmlMember member, XmlTypeContext context, Type valueType, bool shouldWriteTypeName)
{
var contractValueType = context.Contract.ValueType;
if (!Settings.IsBuildingObjectGraph)
{
writer.WriteStartElement(member.Name);
if (initialState)
{
initialState = false;
WriteNamespaces(writer);
}
if (shouldWriteTypeName)
{
WriteTypeName(writer, valueType);
}
}
object referencedValue = value;
if (value is IAnyOptional optValue && optValue.HasValue)
{
contractValueType = optValue.GetInnerType();
referencedValue = optValue.Value;
}
var isCollection = !contractValueType.Equals(typeof(string)) &&
contractValueType.IsEnumerable();
var isModel = contractValueType.IsClass && contractValueType != typeof(string);
if (context.Contract is XmlObjectContract && isModel && !isCollection)
{
long id = settings.ReferenceHandlingGenerator.GetId(referencedValue, out bool firstTime);
if (Settings.IsBuildingObjectGraph)
{
if (firstTime)
{
_xmlReferenceLevelLookup.Add(id, currentLevel);
currentLevel++;
WriteXml(writer, value, member, context);
currentLevel--;
}
else
{
if (Settings.ReferenceHandling == XmlReferenceHandling.Throw)
{
throw new Exception("Found reference loop. Please set ReferenceHandling setting to XmlReferenceHandling.Handle");
}
if (currentLevel < _xmlReferenceLevelLookup[id])
{
_xmlReferenceLevelLookup[id] = currentLevel;
}
}
// stop processing
return;
}
bool isExpansionElement = Settings.ReferenceExpansion == XmlReferenceExpansion.FirstAccessed
? firstTime
: currentLevel == _xmlReferenceLevelLookup[id];
if (isExpansionElement)
{
if (Settings.ReferenceExpansion == XmlReferenceExpansion.HighestLevel)
{
// element should only be expanded once - prevents expansion of elements on the same level
_xmlReferenceLevelLookup[id] = -1;
}
if (Settings.ReferenceHandling == XmlReferenceHandling.Handle)
{
writer.WriteAttributeString(Settings.ReferenceHandlingIdName, id.ToString());
}
currentLevel++;
WriteXml(writer, value, member, context);
currentLevel--;
}
else
{
if (Settings.ReferenceHandling == XmlReferenceHandling.Throw)
{
throw new Exception("Found reference loop. Please set ReferenceHandling setting to XmlReferenceHandling.Handle");
}
writer.WriteAttributeString(Settings.ReferenceHandlingReferenceName, id.ToString());
}
}
else
{
if (!Settings.IsBuildingObjectGraph || isCollection)
{
WriteXml(writer, value, member, context);
}
}
if (!Settings.IsBuildingObjectGraph)
{
writer.WriteEndElement();
}
}
private void Serialize(XmlWriter writer, object value, Type memberType, XmlMember member)
{
if (writer == null)
{
throw new ArgumentNullException("writer");
}
// ignore optional values with none value
if (value is IAnyOptional optional)
{
if (!optional.HasValue)
{
if (Settings.NoneValueHandling == XmlNoneValueHandling.Ignore)
{
return;
}
// Output default values for inner types
var innerType = optional.GetInnerType();
var nullableInnerType = innerType.GetUnderlyingNullableType();
if (nullableInnerType != null)
{
WriteNull(writer, memberType, member);
return;
}
else if (innerType.IsClass)
{
WriteNull(writer, memberType, member);
return;
}
}
else if (optional.Value == null)
{
WriteNull(writer, memberType, member);
return;
}
}
if (value == null)
{
WriteNull(writer, memberType, member);
return;
}
if (settings.EmptyCollectionHandling == XmlEmptyCollectionHandling.Ignore && value.IsEmpty() == true)
{
return;
}
XmlTypeContext context = null;
if (member == null)
{
context = settings.GetTypeContext(memberType);
member = context.Contract.Root;
}
bool shouldWriteTypeName = TryResolveValueType(value, ref member, out Type valueType);
if (member.DefaultValue != null)
{
XmlDefaultValueHandling defaultValueHandling = member.DefaultValueHandling ?? settings.DefaultValueHandling;
if (defaultValueHandling == XmlDefaultValueHandling.Ignore && value.Equals(member.DefaultValue))
{
return;
}
}
if (context == null || context.Contract.ValueType != member.ValueType)
{
context = settings.GetTypeContext(valueType);
}
switch (member.MappingType)
{
case XmlMappingType.Element:
WriteElement(writer, value, member, context, valueType, shouldWriteTypeName);
break;
case XmlMappingType.Attribute:
if (!Settings.IsBuildingObjectGraph)
{
writer.WriteStartAttribute(member.Name);
}
WriteXml(writer, value, member, context);
if (!Settings.IsBuildingObjectGraph)
{
writer.WriteEndAttribute();
}
break;
case XmlMappingType.InnerText:
if (!Settings.IsBuildingObjectGraph)
{
WriteXml(writer, value, member, context);
}
break;
}
}
