internal static object DeserializeToCSharpObject(IEnumerable <XNode> content, Type resultType, XElement parentElement, IReadOnlyList <Type> knownTypes, bool ignoreErrors, bool useXmlSerializerFormat)
{
if (resultType.IsGenericType && resultType.GetGenericTypeDefinition() == typeof(Nullable <>))
{
resultType = resultType.GetGenericArguments()[0];
}
Type itemsType;
//if (resultType.IsValueType || resultType == typeof(string))
if (resultType.IsEnum || DataContractSerializer_ValueTypesHandler.TypesToNames.ContainsKey(resultType))
{
//-------------------------
// VALUE TYPE OR STRING
//-------------------------
return(DeserializeToCSharpObject_ValueTypeOrString(content, resultType));
}
else if (resultType.IsArray && resultType.GetElementType() == typeof(Byte))
{
//-------------------------
// BYTE ARRAY
//-------------------------
return(DeserializeToCSharpObject_ByteArray(content));
}
else if (DataContractSerializer_Helpers.IsAssignableToGenericEnumerableOrArray(resultType, out itemsType))
{
//-------------------------
// IEnumerable<T> or array (WITH RECURSION)
//-------------------------
return(DeserializeToCSharpObject_Enumerable_WithRecursion(content, resultType, knownTypes, ignoreErrors, itemsType, useXmlSerializerFormat));
}
else
{
//-------------------------
// OTHER OBJECT TYPE (WITH RECURSION)
//-------------------------
return(DeserializeToCSharpObject_Object_WithRecursion(content, resultType, parentElement, knownTypes, ignoreErrors, useXmlSerializerFormat));
}
throw new Exception("Unable to create the type '" + resultType.ToString() + "'.");
}
static List <XNode> SerializeToXNodes_Enumerable_WithRecursion(object obj, Type objectType, IReadOnlyList <Type> knownTypes, bool useXmlSerializerFormat, string nodeDefaultNamespaceIfAny, bool isRoot, bool isContainedInsideEnumerable)
{
List <XNode> result = new List <XNode>();
// Get the type information (namespace, etc.) by reading the DataContractAttribute and similar attributes, if present:
TypeInformation typeInformation = DataContractSerializer_Helpers.GetTypeInformationByReadingAttributes(objectType, nodeDefaultNamespaceIfAny);
// Traverse the collection:
foreach (object item in (IEnumerable)obj)
{
//todo: USEMETHODTOGETTYPE: make a method that returns the actual type of object and replace all USEMETHODTOGETTYPE with a call to this method. (also find other places where we could use it)
Type itemType = item.GetType();
if (item is char) //special case because JSIL thinks a variable of type object containing a char contains a string.
{
itemType = typeof(char);
}
//********** RECURSION **********
//WILD GUESS: Since we are going to the content of an IEnumerable, the namespace of the IEnumerable becomes irrelevant for its content so we give them null instead.
List <XNode> xnodesForItem = SerializeToXNodes(item, itemType, knownTypes, useXmlSerializerFormat, isRoot: false, isContainedInsideEnumerable: true, parentTypeInformation: typeInformation, nodeDefaultNamespaceIfAny: typeInformation.NamespaceName);
// Keep only the first node:
if (xnodesForItem.Count > 1)
{
throw new Exception("When serializing an IEnumerable, we do not expect an item of the enumerable to be serialized as multiple XNodes.");
}
XNode nodeForItem = xnodesForItem.First();
// If it's a value type, add an XElement to surround the node:
if (nodeForItem is XText)
{
//todo: do we still ever enter this block? In fact, we now add the surrounding XElement in other places.
//------------
// Value type
//------------
//we assume namespace of the element is "http://schemas.microsoft.com/2003/10/Serialization/Arrays" as that is what it is for both an array and a list of string
//the name of the element should be found in the Dictionary Type --> XName with the item's type
//Note: We shoud not arrive here if we cannot find the name in the Dictionary mentioned (except maybe for structs but we'll see when we'll deal with them).
XName elementName = XNamespace.Get("http://schemas.microsoft.com/2003/10/Serialization/Arrays").GetName(DataContractSerializer_ValueTypesHandler.TypesToNames[item.GetType()]); //in this line, we create a XName with the namespace that seems to be used for all Enumerables and a name associated with the type.
XElement element = new XElement(elementName);
// name of the element: use the Dictionary Type --> XName with the item's type
element.Add(nodeForItem);
nodeForItem = element;
}
// Add the node to the resulting collection of nodes:
result.Add(nodeForItem);
}
// If the value is the root, add an XElement "ArrayOf..." to surround the nodes:
if (isRoot)
{
Type itemsType;
if (DataContractSerializer_Helpers.IsAssignableToGenericEnumerableOrArray(objectType, out itemsType))
{
string elementName = "Array";
if (DataContractSerializer_ValueTypesHandler.TypesToNames.ContainsKey(itemsType))
{
elementName = "ArrayOf" + DataContractSerializer_ValueTypesHandler.TypesToNames[itemsType];
}
else
{
// In case of nested types, replace the '+' with '.', and do other changes to obtain the type name to use in the serialization:
string itemsTypeName = DataContractSerializer_Helpers.GetTypeNameSafeForSerialization(itemsType);
elementName = "ArrayOf" + itemsTypeName;
}
XElement xElement = new XElement(XNamespace.Get("http://schemas.microsoft.com/2003/10/Serialization/Arrays").GetName(elementName), result);
xElement.Add(new XAttribute(XNamespace.Get(DataContractSerializer_Helpers.XMLNS_NAMESPACE).GetName("xmlns:i"), DataContractSerializer_Helpers.XMLSCHEMA_NAMESPACE));
return(new List <XNode>()
{
xElement
});
}
else
{
throw new SerializationException(string.Format("The type '{0}' cannot be serialized because it does implement IEnumerable<T> nor is it an Array.", objectType.ToString())); //todo: see if we can avoid this limitation.
}
}
return(result);
}
static object DeserializeToCSharpObject_Object_WithRecursion(IEnumerable <XNode> content, Type resultType, XElement parentElement, IReadOnlyList <Type> knownTypes, bool ignoreErrors, bool useXmlSerializerFormat)
{
// Quit if attempting to deserialize to an interface: //todo: investigate why this may happen.
if (!resultType.IsInterface)
{
string resultTypeFullName = resultType.FullName; // For debugging only, can be removed.
// Create the resulting class:
object resultInstance = Activator.CreateInstance(resultType); //todo: replace with "System.Runtime.Serialization.FormatterServices.GetUninitializedObject(type)" so that the type does not require a parameterless constructor.
// Call the "OnDeserializing" method if any:
CallOnDeserializingMethod(resultInstance, resultType);
// Get the type information (namespace, etc.) by reading the DataContractAttribute and similar attributes, if present:
TypeInformation typeInformation = DataContractSerializer_Helpers.GetTypeInformationByReadingAttributes(resultType, null);
// Read the members of the target type:
IEnumerable <MemberInformation> membersInformation = DataContractSerializer_Helpers.GetDataContractMembers(resultType, typeInformation.serializationType, useXmlSerializerFormat);
// Make a dictionary of the members of the target type for faster lookup:
Dictionary <string, MemberInformation> memberNameToMemberInformation = new Dictionary <string, MemberInformation>();
foreach (var memberInformation in membersInformation)
{
string memberName = memberInformation.Name;
if (resultType.FullName.StartsWith("System.Collections.Generic.KeyValuePair"))
{
if (memberName == "key")
{
memberName = "Key";
}
else if (memberName == "value")
{
memberName = "Value";
}
}
if (!memberNameToMemberInformation.ContainsKey(memberName))
{
memberNameToMemberInformation.Add(memberName, memberInformation);
}
else
{
MemberInformation collidingMemberInformation = memberNameToMemberInformation[memberName];
throw new InvalidDataContractException(
string.Format(
"Type '{0}' contains two members '{1}' 'and '{2}' with the same data member name '{3}'. Multiple members with the same name in one type are not supported. Consider changing one of the member names using DataMemberAttribute attribute.",
resultType.ToString(),
memberInformation.MemberInfo.Name,
collidingMemberInformation.MemberInfo.Name,
memberName
));
}
}
// Populate the values of the properties/members of the class:
HashSet2 <string> membersForWhichWeSuccessfullSetTheValue = new HashSet2 <string>();
foreach (XNode node in content)
{
if (node is XElement) // Normally an object property was serialized as an XElement.
{
XElement xElement = (XElement)node;
XName elementName = xElement.Name;
string elementNameWithoutNamespace = elementName.LocalName;
// Find the member that has the name of the XNode:
MemberInformation memberInformation;
if (memberNameToMemberInformation.TryGetValue(elementNameWithoutNamespace, out memberInformation))
{
// Avoid processing nodes that have the same name as other nodes already processed (this can happen in case of [XmlElement] attribute on enumerable members - cf. "special case" below - but it is handled differently):
if (!membersForWhichWeSuccessfullSetTheValue.Contains(memberInformation.Name))
{
object memberValue = null;
Type memberActualType = memberInformation.MemberType; // Note: this is the initial value. It may be modified below.
if (DataContractSerializer_Helpers.IsElementNil(xElement))
{
//----------------------
// XNode is "Nil", so we return the default value of the result type
//----------------------
memberValue = DataContractSerializer_Helpers.GetDefault(memberInformation.MemberType);
}
else
{
bool isNull = false;
//foreach (XAttribute attribute in xElement.Attributes(XNamespace.Get("http://www.w3.org/2001/XMLSchema-instance").GetName("nil"))) //doesn't work...
//todo: try removing this foreach since it should be handled in the "if(IsElementDefaut(xElement))" above.
foreach (XAttribute attribute in xElement.Attributes("nil")) //We have to do this here because those usually do not have nodes, which causes problems when doing the recursion.
{
isNull = Convert.ToBoolean(attribute.Value);
if (isNull)
{
memberValue = null;
}
}
if (!isNull)
{
memberActualType = DataContractSerializer_KnownTypes.GetCSharpTypeForNode(xElement, memberInformation.MemberInfo.DeclaringType, memberActualType, knownTypes, memberInformation);
//if the type is nullable, we get the undelying type:
Type nonNullableMemberType = memberActualType;
if (memberActualType.FullName.StartsWith("System.Nullable`1"))
{
nonNullableMemberType = Nullable.GetUnderlyingType(memberActualType);
}
// Recursively create the value for the property:
IEnumerable <XNode> propertyChildNodes = xElement.Nodes();
//********** RECURSION **********
memberValue = DeserializeToCSharpObject(propertyChildNodes, nonNullableMemberType, xElement, knownTypes, ignoreErrors, useXmlSerializerFormat);
}
//---------------------------------
// Handle the special case where there is an [XmlElement] attribute on an enumerable member (XmlSerializer compatibility mode only):
//
// Example:
// <MyObject>
// <MyEnumerablePropertyName/>
// <MyEnumerablePropertyName/>
// <MyEnumerablePropertyName/>
// </MyObject>
//
// obtained via:
// class MyObject
// {
// [XmlElement]
// List<MyType> MyEnumerablePropertyName { get; set; }
// }
//
// cf. https://docs.microsoft.com/en-us/dotnet/standard/serialization/controlling-xml-serialization-using-attributes
//---------------------------------
Type itemsType = null;
bool specialCaseWhereAnEnumerableHasTheXmlElementAttribute =
(useXmlSerializerFormat &&
memberInformation.HasXmlElementAttribute &&
DataContractSerializer_Helpers.IsAssignableToGenericEnumerableOrArray(memberActualType, out itemsType));
if (specialCaseWhereAnEnumerableHasTheXmlElementAttribute)
{
object deserializedEnumerable = DeserializeToCSharpObject_Enumerable_WithRecursion_SpecialCase(
memberInformation.Name,
content, memberActualType, knownTypes, ignoreErrors, itemsType, useXmlSerializerFormat);
memberValue = deserializedEnumerable;
}
//---------------------------------
// Set the value of the member:
//---------------------------------
DataContractSerializer_Helpers.SetMemberValue(resultInstance, memberInformation, memberValue);
membersForWhichWeSuccessfullSetTheValue.Add(memberInformation.Name);
}
}
}
else
{
//-----------
// We ignore missing members, to mimic the behavior of the .NET DataContractSerializer.
//-----------
//throw new Exception("Member '" + memberName + "' not found in type '" + resultType.Name + "'.");
}
}
}
// In case of XmlSerializer compatibility mode, and [XmlAttribute] attribute on a class member, we also need to deserialize the XAttributes (cf. https://msdn.microsoft.com/en-us/library/system.xml.serialization.xmlattributeattribute(v=vs.110).aspx ):
if (useXmlSerializerFormat)
{
foreach (XAttribute attribute in parentElement.Attributes())
{
XName attributeName = attribute.Name;
// We assume that the object properties have no namespace //todo: fix this assumption, cf. "XmlAttributeAttribute.Namespace" for example (note: repetition of "Attribute" is intended)
if (string.IsNullOrEmpty(attributeName.NamespaceName))
{
string attributeNameWithoutNamespace = attributeName.LocalName;
// Find the member that has the name of the XAttribute:
MemberInformation memberInformation;
if (memberNameToMemberInformation.TryGetValue(attributeNameWithoutNamespace, out memberInformation) &&
memberInformation.HasXmlAttributeAttribute)
{
// Avoid processing members that have already been processed (just in case):
if (!membersForWhichWeSuccessfullSetTheValue.Contains(memberInformation.Name))
{
string attributeValue = attribute.Value;
// Check to see if the expected type is a value type:
if (DataContractSerializer_ValueTypesHandler.TypesToNames.ContainsKey(memberInformation.MemberType))
{
// Attempt to deserialize the string:
object memberValue = DataContractSerializer_ValueTypesHandler.ConvertStringToValueType(attributeValue, memberInformation.MemberType);
// Set the value of the member:
DataContractSerializer_Helpers.SetMemberValue(resultInstance, memberInformation, memberValue);
membersForWhichWeSuccessfullSetTheValue.Add(memberInformation.Name);
}
else
{
//todo: report the error?
if (memberInformation.MemberType == typeof(List <int>))
{
string[] splittedElements = attributeValue.Split(' ');
#if !BRIDGE
List <int> listint = splittedElements.Select(Int32.Parse).ToList();
#else
List <int> listint = new List <int>();
foreach (string str in splittedElements)
{
listint.Add(Int32.Parse(str));
}
#endif
DataContractSerializer_Helpers.SetMemberValue(resultInstance, memberInformation, listint);
membersForWhichWeSuccessfullSetTheValue.Add(memberInformation.Name);
}
}
}
else
{
//todo: report the error?
}
}
else
{
//todo: report the error?
}
}
}
}
// Verify that the values of all the members marked as "IsRequired" have been set:
foreach (var memberInformation in membersInformation)
{
if (memberInformation.IsRequired &&
!membersForWhichWeSuccessfullSetTheValue.Contains(memberInformation.Name))
{
throw new SerializationException(string.Format("The member '{0}' is required but it was not found in the document being deserialized.", memberInformation.Name));
}
}
// Call the "OnDeserialized" method if any:
CallOnDeserializedMethod(resultInstance, resultType);
return(resultInstance);
}
else
{
return(null);
}
}
