public void RegisterExtension(IXmlExtension extension)
{
if (extension == null)
{
throw new ArgumentNullException();
}
else
{
extensions.Add(extension);
}
}
public XElement GenerateExtensionElement(IXmlExtension extension)
{
Type extType = extension.GetType();
string type = extType.ToString();
Assembly assembly = Assembly.GetAssembly(extType);
XElement extNode = new XElement(extNames.ExtensionElement,
new XAttribute(extNames.ExtensionPreferredDeserializerAttribute, type),
new XAttribute(extNames.ExtensionDezerializerAssemblyAttribute, assembly.GetName().Name + ".dll"));
extension.WriteObject(extNode);
return(extNode);
}
public ExtendedGraph Load(XDocument xdoc)
{
Graph graph = GraphXmlDeserializer.LoadFromXml(xdoc);
ExtensionXmlNames extNames = new ExtensionXmlNames();
List <IXmlExtension> extensions = new List <IXmlExtension>();
if (xdoc != null)
{
XElement extensionList = xdoc.Root.Element(extNames.ExtensionListElement);
foreach (XElement extensionNode in extensionList.Elements(extNames.ExtensionElement))
{
string typeName = extensionNode.Attribute(extNames.ExtensionPreferredDeserializerAttribute)?.Value;
string assemblyName = extensionNode.Attribute(extNames.ExtensionDezerializerAssemblyAttribute)?.Value;
if (String.IsNullOrEmpty(typeName) || String.IsNullOrEmpty(assemblyName))
{
Debug.WriteLine($"Extension loading skipped. Parameters [{typeName}] and [{assemblyName}]");
continue;
}
Assembly assembly = Assembly.LoadFrom(assemblyName);
if (assembly == null)
{
Debug.WriteLine($"Assembly [{assemblyName}] could not be loaded.");
continue;
}
Type type = assembly.GetType(typeName);
if (type == null)
{
Debug.WriteLine($"Type [{typeName}] does not exist in assembly [{assemblyName}].");
continue;
}
IXmlExtension extension = Activator.CreateInstance(type) as IXmlExtension;
if (extension == null)
{
Debug.WriteLine($"Instance of type [{typeName}] could not be created as IXmlExtension.");
continue;
}
extension.ReadObject(extensionNode);
extensions.Add(extension);
}
return(new ExtendedGraph(graph, extensions));
}
return(null);
}
