/// <summary>
/// The framework will deserialize the object. No more surrogates or other "exceptional"
/// behaviour.
/// </summary>
/// <param name="_xml"></param>
/// <param name="_type"></param>
/// <param name="_workingObject"></param>
private void HandleDeserialization(XmlElement _xml, Type _type, CWorkingObject _workingObject)
{
// Strings are really easy- just return the "InnerText"
if (_type == TYPEOF_STRING)
{
_workingObject.Set(Environment.ExpandEnvironmentVariables(_xml.InnerText));
}
// Primitives are also pretty easy, only because of the "Convert" class
else if (_type.IsPrimitive)
{
_workingObject.Set(Convert.ChangeType(_xml.InnerText, _type));
}
// Check for an Array
else if (_type.IsArray || XmlExtensions.HasAttribute(_xml, m_context.ArrayAttributeName))
{
DeserializeArray(_xml, _type, _workingObject);
}
else if (_type.IsEnum)
{
_workingObject.Set(Enum.Parse(_type, _xml.InnerText, false));
}
else // Handle ref-type fields and base classes.
{
DeserializeReferenceType(_xml, _type, _workingObject);
}
}
/// <summary>
/// Turn the innerText of an XML node into a DateTime and return that DateTime
/// </summary>
/// <param name="_object">The object to deserialize into</param>
/// <param name="_node">The node containing the DateTime string</param>
/// <param name="_deserializer">The serializer- not used</param>
/// <returns>a DateTime object</returns>
public bool Deserialize(CWorkingObject _object, XmlElement _node, CDeserializer _deserializer)
{
var sb = new StringBuilder(_node.InnerText);
_object.Set(sb);
return(true);
}
/// <summary>
/// Create an Array from the data in the Xml and return that array.
/// </summary>
/// <param name="_xml">The XML containing the data for the array</param>
/// <param name="_type">The Type of the array, as inferred from the framework</param>
/// <param name="_workingObject">
/// A working object (optional) that must be an Array (if its not null)
/// </param>
/// <returns></returns>
private void DeserializeArray(XmlElement _xml, Type _type, CWorkingObject _workingObject)
{
var condensedArray = FindCondensedArray(_xml);
var inferredLength = (condensedArray != null) ? condensedArray.Length : -1;
var arrayHelper =
CreateArrayDeserializationHelper(_xml, _type, _workingObject, inferredLength);
// At this stage, we know its a Rank 1 array. Figure out the serialization of that
// array Single child node that's a text node is an assumed indicator that the
// "Condensed" format was used to serialize
if (condensedArray != null)
{
DeserializeArrayFromCondensedArray(condensedArray, arrayHelper);
}
else
{
// There are individual child XmlElements for each array element. "Index"
// attributes can be used to "skip" null array values.
DeserializeArrayFromElements(_xml, arrayHelper);
}
if (!_workingObject.IsSet)
{
_workingObject.Set(arrayHelper.Array);
}
}
/// <summary>
/// Check the easiest forms of deserialization- Null and RefTo an object already
/// deserialized.
/// </summary>
/// <param name="_xml">The XML that's being deserialized</param>
/// <param name="_workObj">
/// The Object that was deserialized (when the return value is TRUE)
/// </param>
/// <returns>
/// TRUE means that the _workObj parameter contains valid data and nothing further
/// should be done, FALSE means that no deserialization was performed.
/// </returns>
private bool CheckNullAndReference(XmlElement _xml, CWorkingObject _workObj)
{
// Check the XML to see if this is a NULL object reference. If it is, then return
// TRUE.
if (XmlExtensions.HasAttribute(_xml, m_context.NullAttributeName))
{
return(true);
}
// Check the XML to see if its referring to some other object.
var referTo = XmlExtensions.GetAttributeValue(_xml, m_context.ReferToAttributeName);
if (referTo != null) // There was a reference to another object, so handle it and return that other object.
{
// Check the table for the RefID to get the object. The reference must be in the
// table already because forward-looking references are not supported.
if (!m_references.TryGetValue(referTo, out var obj))
{
throw new XUnknownReference("All object-references must be to backward-defined objects. The RefID " + referTo + " has not been defined yet.");
}
_workObj.Set(obj);
return(true);
}
// Check to see if this element is associating the XML with a reference ID
var refId = XmlExtensions.GetAttributeValue(_xml, m_context.ReferenceIdAttributeName);
if (refId != null)
{
_workObj.SetRefInfo(this, refId);
}
return(false);
}
/// <summary>
/// Turn the innerText of an XML node into a DateTime and return that DateTime
/// </summary>
/// <param name="_object">The object to deserialize into</param>
/// <param name="_node">The node containing the DateTime string</param>
/// <param name="_deserializer">The serializer- not used</param>
/// <returns>a DateTime object</returns>
public bool Deserialize(CWorkingObject _object, XmlElement _node, CDeserializer _deserializer)
{
var dateData = long.Parse(_node.InnerText, NumberStyles.AllowHexSpecifier);
_object.Set(DateTime.FromBinary(dateData));
return(true);
}
/// <summary>
/// This is the Deserializer to turn a UTC "Complete date plus hours, minutes and seconds" string
/// back into a DateTime structure.
/// </summary>
/// <param name="_workingObject">The object that is to receive the new DateTime structure</param>
/// <param name="_parentNode">The node whose InnerText contains the UTC string</param>
/// <param name="_deserializer">The deserializer- not used.</param>
/// <returns>"true", because this routine completely deserializes the DateTime</returns>
public bool Deserialize(CWorkingObject _workingObject, XmlElement _parentNode, CDeserializer _deserializer)
{
var asString = _parentNode.InnerText;
var dt = FromString(asString);
_workingObject.Set(dt);
return(true);
}
/// <summary>
/// The Type is a reference type with zero or more fields, and it is to be deserialized
/// using the Framework's algorithm
/// </summary>
/// <param name="_xml">The XML containing the field data</param>
/// <param name="_type">The Type that is to be deserialized</param>
/// <param name="_workingObject">
/// The working object to be used if it is set (create new object instance if not)
/// </param>
/// <returns>The newly deserialized object</returns>
private void DeserializeReferenceType(XmlElement _xml, Type _type, CWorkingObject _workingObject)
{
var typeData = CTypeData.GetTypeData(_type);
if (!_workingObject.IsSet)
{
// Check to see if we can do anything with an explicit constructor (likely to be
// private)
var o = typeData.TryExplicitConstructor();
if (o == null)
{
o = Activator.CreateInstance(_type);
}
if (o == null)
{
throw new XDeserializationError("Could not create a new object of type " + _type.ToString());
}
_workingObject.Set(o);
}
var currentObject = _workingObject.WorkingObject;
while (typeData != null)
{
DeserializeObjectFields(_xml, currentObject, typeData);
ClearIgnoredFields();
typeData = typeData.BaseType;
if (typeData != null)
{
if (ApplySurrogates(_xml, typeData.Type, _workingObject))
{
typeData = null;
}
}
}
}
/// <summary>
/// Turn the innerText of an XML node into a guid and return that guid
/// </summary>
/// <param name="_node">The node containing the GUID string</param>
/// <param name="_object">The object to deserialize into</param>
/// <param name="_deserializer">The Deserializer- not used</param>
/// <returns>a GUID object</returns>
public bool Deserialize(CWorkingObject _object, XmlElement _node, CDeserializer _deserializer)
{
_object.Set(new Guid(_node.InnerText));
return(true);
}