public static DataViewRowCursor Create(DatabaseLoader parent, DatabaseSource source, bool[] active)
{
Contracts.AssertValue(parent);
Contracts.AssertValue(source);
Contracts.Assert(active == null || active.Length == parent._bindings.OutputSchema.Count);
return(new Cursor(parent, source, active));
}
public BoundLoader(DatabaseLoader loader, DatabaseSource source)
{
_loader = loader;
_host = loader._host.Register(nameof(BoundLoader));
_host.CheckValue(source, nameof(source));
_source = source;
}
private Cursor(DatabaseLoader parent, DatabaseSource source, bool[] active)
: base(parent._host)
{
Ch.Assert(active == null || active.Length == parent._bindings.OutputSchema.Count);
Ch.CheckValue(source, nameof(source));
_total = -1;
_bindings = parent._bindings;
_active = active;
_source = source;
_getters = new Delegate[_bindings.Infos.Length];
for (int i = 0; i < _getters.Length; i++)
{
if (_active != null && !_active[i])
{
continue;
}
_getters[i] = CreateGetterDelegate(i);
Ch.Assert(_getters[i] != null);
}
}
