/// <summary>
/// Returns a ClassBase object representing a type that appears in
/// this module's namespace or a ModuleObject representing a child
/// namespace (or null if the name is not found). This method does
/// not increment the Python refcount of the returned object.
/// </summary>
public ManagedType GetAttribute(string name, bool guess)
{
ManagedType cached = null;
cache.TryGetValue(name, out cached);
if (cached != null)
{
return(cached);
}
ModuleObject m;
ClassBase c;
Type type;
//if (AssemblyManager.IsValidNamespace(name))
//{
// IntPtr py_mod_name = Runtime.PyString_FromString(name);
// IntPtr modules = Runtime.PyImport_GetModuleDict();
// IntPtr module = Runtime.PyDict_GetItem(modules, py_mod_name);
// if (module != IntPtr.Zero)
// return (ManagedType)this;
// return null;
//}
string qname = _namespace == string.Empty
? name
: _namespace + "." + name;
// If the fully-qualified name of the requested attribute is
// a namespace exported by a currently loaded assembly, return
// a new ModuleObject representing that namespace.
if (AssemblyManager.IsValidNamespace(qname))
{
m = new ModuleObject(qname);
StoreAttribute(name, m);
return(m);
}
// Look for a type in the current namespace. Note that this
// includes types, delegates, enums, interfaces and structs.
// Only public namespace members are exposed to Python.
type = AssemblyManager.LookupType(qname);
if (type != null)
{
if (!type.IsPublic)
{
return(null);
}
c = ClassManager.GetClass(type);
StoreAttribute(name, c);
return(c);
}
// This is a little repetitive, but it ensures that the right
// thing happens with implicit assembly loading at a reasonable
// cost. Ask the AssemblyManager to do implicit loading for each
// of the steps in the qualified name, then try it again.
bool ignore = name.StartsWith("__");
if (AssemblyManager.LoadImplicit(qname, !ignore))
{
if (AssemblyManager.IsValidNamespace(qname))
{
m = new ModuleObject(qname);
StoreAttribute(name, m);
return(m);
}
type = AssemblyManager.LookupType(qname);
if (type != null)
{
if (!type.IsPublic)
{
return(null);
}
c = ClassManager.GetClass(type);
StoreAttribute(name, c);
return(c);
}
}
// We didn't find the name, so we may need to see if there is a
// generic type with this base name. If so, we'll go ahead and
// return it. Note that we store the mapping of the unmangled
// name to generic type - it is technically possible that some
// future assembly load could contribute a non-generic type to
// the current namespace with the given basename, but unlikely
// enough to complicate the implementation for now.
if (guess)
{
string gname = GenericUtil.GenericNameForBaseName(_namespace, name);
if (gname != null)
{
ManagedType o = GetAttribute(gname, false);
if (o != null)
{
StoreAttribute(name, o);
return(o);
}
}
}
return(null);
}
//===================================================================
// Scans an assembly for exported namespaces, adding them to the
// mapping of valid namespaces. Note that for a given namespace
// a.b.c.d, each of a, a.b, a.b.c and a.b.c.d are considered to
// be valid namespaces (to better match Python import semantics).
//===================================================================
static void ScanAssembly(Assembly assembly)
{
// A couple of things we want to do here: first, we want to
// gather a list of all of the namespaces contributed to by
// the assembly.
Type[] types = assembly.GetTypes();
for (int i = 0; i < types.Length; i++)
{
Type t = types[i];
string ns = t.Namespace;
if ((ns != null) && (!namespaces.ContainsKey(ns)))
{
string[] names = ns.Split('.');
string s = "";
for (int n = 0; n < names.Length; n++)
{
s = (n == 0) ? names[0] : s + "." + names[n];
if (!namespaces.ContainsKey(s))
{
namespaces.Add(s,
new Dictionary <Assembly, string>()
);
}
}
}
if (ns != null && !namespaces[ns].ContainsKey(assembly))
{
namespaces[ns].Add(assembly, String.Empty);
}
if (t.IsGenericTypeDefinition)
{
GenericUtil.Register(t);
// Dictionary<string, string> map = null;
// generics.TryGetValue(t.Namespace, out map);
// if (map == null) {
// map = new Dictionary<string, string>();
// generics[t.Namespace] = map;
// }
// string bname = t.Name;
// string mapped = null;
// int tick = bname.IndexOf("`");
// if (tick > -1) {
// bname = bname.Substring(0, tick);
// }
// map.TryGetValue(bname, out mapped);
// if (mapped == null) {
// map[bname] = t.Name;
// }
}
// if (t.IsGenericTypeDefinition) {
// List<string> snames = null;
// special.TryGetValue(t.Namespace, out snames);
// if (snames == null) {
// snames = new List<string>(8);
// special[t.Namespace] = snames;
// }
// snames.Add(t.Name);
// }
}
}
