public IFieldSimpleItem Create()
{
IFieldSimpleItem created = InternalCreate();
CheckCreatedType(created);
return(created);
}
private void CheckCreatedType(IFieldSimpleItem item)
{
Type inspect = this.GetType();
bool keepgoing = true;
while (keepgoing)
{
string name = inspect.FullName;
if (CheckDelegateMethods.ContainsKey(name))
{
var checkDelegate = CheckDelegateMethods[name];
if (!checkDelegate(item))
{
throw new Exception("failed check");
}
}
if (inspect == typeof(A))
{
keepgoing = false;
}
else
{
inspect = inspect.BaseType;
}
}
// base class doesn't care. compiler guarantees IFieldSimpleItem
}
protected override void CheckCreatedType(IFieldSimpleItem item)
{
base.CheckCreatedType(item);
if (!(item is IFieldNormalItem))
{
throw new Exception("I need a normal item.");
}
}
protected virtual void CheckCreatedType(IFieldSimpleItem item)
{
// base class doesn't care. compiler guarantees IFieldSimpleItem
}
