public static IDiscriminatorPolicy GetDiscriminatorPolicy(DiscriminatorType policyType)
{
switch (policyType)
{
case DiscriminatorType.Attribute:
return new AttributeDiscriminatorPolicy();
break;
case DiscriminatorType.Node:
return new NodeDiscriminatorPolicy();
break;
default:
throw new Exception("Unable to determine the policy");
}
}
public static object Deserialize(string xml, DiscriminatorType discriminatorType = DiscriminatorType.Attribute)
{
var xmlDocument = new XmlDocument();
xmlDocument.LoadXml(xml);
// read "discriminator" and infer the real type
var discriminatorPolicy = DiscriminatotyPolicyFactory.GetDiscriminatorPolicy(discriminatorType);
// now we know the real type based on the discriminator to deserialize
var serializer = new XmlSerializer(discriminatorPolicy.RetrieveRealType(xmlDocument));
using (var stream = new MemoryStream(Encoding.ASCII.GetBytes(xml)))
{
return serializer.Deserialize(stream);
}
}
public static string Serialize(object info, DiscriminatorType discriminatorType = DiscriminatorType.Attribute)
{
var serializer = new XmlSerializer(info.GetType());
using (var stream = new MemoryStream())
{
// Serialize
serializer.Serialize(stream, info);
stream.Position = 0;
// Open serialization output
var xmlDocument = new XmlDocument();
xmlDocument.Load(stream);
// Add a "discriminador" based on the real type, to use it during deserialization
var discriminatorPolicy = DiscriminatotyPolicyFactory.GetDiscriminatorPolicy(discriminatorType);
discriminatorPolicy.CreateDiscriminator(info, xmlDocument);
// return the xml with the discriminator
return xmlDocument.OuterXml;
}
}
// ctor is private so you can't create an invalid instance
private RustyEnum(DiscriminatorType type, object value)
{
Discriminator = type;
Value = value;
}
