/// <SecurityNote>
/// Because this is a public virtual method, idempotence cannot be guaranteed.
/// S.X doesn't use this method at all; but any externals consumers who are doing security checks
/// based on the returned method should make sure that they are resillient to changing results.
/// </SecurityNote>
public virtual MethodInfo GetAddMethod(XamlType contentType)
{
if (contentType == null)
{
throw new ArgumentNullException(nameof(contentType));
}
if (IsUnknown || _xamlType.ItemType == null)
{
return(null);
}
// Common case is that we match the item type. Short-circuit any additional lookup.
if (contentType == _xamlType.ItemType ||
(_xamlType.AllowedContentTypes.Count == 1 && contentType.CanAssignTo(_xamlType.ItemType)))
{
return(_xamlType.AddMethod);
}
// Only collections can have additional content types
if (!_xamlType.IsCollection)
{
return(null);
}
// Populate the dictionary of all available Add methods
MethodInfo addMethod;
if (_addMethods == null)
{
Dictionary <XamlType, MethodInfo> addMethods = new Dictionary <XamlType, MethodInfo>();
addMethods.Add(_xamlType.ItemType, _xamlType.AddMethod);
foreach (XamlType type in _xamlType.AllowedContentTypes)
{
addMethod = CollectionReflector.GetAddMethod(
_xamlType.UnderlyingType, type.UnderlyingType);
if (addMethod != null)
{
addMethods.Add(type, addMethod);
}
}
_addMethods = addMethods;
}
// First try the fast path. Look for an exact match.
if (_addMethods.TryGetValue(contentType, out addMethod))
{
return(addMethod);
}
// Next the slow path. Check each one for is assignable from.
foreach (KeyValuePair <XamlType, MethodInfo> pair in _addMethods)
{
if (contentType.CanAssignTo(pair.Key))
{
return(pair.Value);
}
}
return(null);
}
public virtual MethodInfo GetAddMethod(XamlType contentType)
{
if (contentType == null)
{
throw new ArgumentNullException("contentType");
}
if (!this.IsUnknown && (this._xamlType.ItemType != null))
{
MethodInfo addMethod;
if ((contentType == this._xamlType.ItemType) || ((this._xamlType.AllowedContentTypes.Count == 1) && contentType.CanAssignTo(this._xamlType.ItemType)))
{
return(this._xamlType.AddMethod);
}
if (!this._xamlType.IsCollection)
{
return(null);
}
if (this._addMethods == null)
{
Dictionary <XamlType, MethodInfo> dictionary = new Dictionary <XamlType, MethodInfo>();
dictionary.Add(this._xamlType.ItemType, this._xamlType.AddMethod);
foreach (XamlType type in this._xamlType.AllowedContentTypes)
{
addMethod = CollectionReflector.GetAddMethod(this._xamlType.UnderlyingType, type.UnderlyingType);
if (addMethod != null)
{
dictionary.Add(type, addMethod);
}
}
this._addMethods = dictionary;
}
if (this._addMethods.TryGetValue(contentType, out addMethod))
{
return(addMethod);
}
foreach (KeyValuePair <XamlType, MethodInfo> pair in this._addMethods)
{
if (contentType.CanAssignTo(pair.Key))
{
return(pair.Value);
}
}
}
return(null);
}