public ValueSerializerContext(PrefixLookup prefixLookup, XamlSchemaContext schemaContext, IAmbientProvider ambientProvider)
{
if (prefixLookup == null)
{
throw new ArgumentNullException("prefixLookup");
}
if (schemaContext == null)
{
throw new ArgumentNullException("schemaContext");
}
prefix_lookup = prefixLookup;
namespace_resolver = new NamespaceResolver(prefix_lookup.Namespaces);
type_resolver = new XamlTypeResolver(namespace_resolver, schemaContext);
sctx = schemaContext;
ambient_provider = ambientProvider;
}
// Namespace and Reference retrieval.
// It is iterated before iterating the actual object nodes,
// and results are cached for use in XamlObjectReader.
public void PrepareReading()
{
PrefixLookup.IsCollectingNamespaces = true;
NameResolver.IsCollectingReferences = true;
foreach (var xn in GetNodes())
{
if (xn.NodeType == XamlNodeType.GetObject)
{
continue; // it is out of consideration here.
}
if (xn.NodeType == XamlNodeType.StartObject)
{
foreach (var ns in NamespacesInType(xn.Object.Type))
{
PrefixLookup.LookupPrefix(ns);
}
}
else if (xn.NodeType == XamlNodeType.StartMember)
{
var xm = xn.Member.Member;
// This filtering is done as a black list so far. There does not seem to be any usable property on XamlDirective.
if (xm == XamlLanguage.Items || xm == XamlLanguage.PositionalParameters || xm == XamlLanguage.Initialization)
{
continue;
}
PrefixLookup.LookupPrefix(xn.Member.Member.PreferredXamlNamespace);
}
else
{
if (xn.NodeType == XamlNodeType.Value && xn.Value is Type)
{
// this tries to lookup existing prefix, and if there isn't any, then adds a new declaration.
TypeExtensionMethods.GetStringValue(XamlLanguage.Type, xn.Member.Member, xn.Value, value_serializer_ctx);
}
continue;
}
}
PrefixLookup.Namespaces.Sort((nd1, nd2) => String.CompareOrdinal(nd1.Prefix, nd2.Prefix));
PrefixLookup.IsCollectingNamespaces = false;
NameResolver.IsCollectingReferences = false;
NameResolver.NameScopeInitializationCompleted(this);
}