public Cursor(StatefulFilterTransform <TSrc, TDst, TState> parent, IRowCursor <TSrc> input, Func <int, bool> predicate)
: base(parent.Host)
{
Ch.AssertValue(input);
Ch.AssertValue(predicate);
_parent = parent;
_input = input;
_src = new TSrc();
_dst = new TDst();
_state = new TState();
CursorChannelAttribute.TrySetCursorChannel(_parent.Host, _src, Ch);
CursorChannelAttribute.TrySetCursorChannel(_parent.Host, _dst, Ch);
CursorChannelAttribute.TrySetCursorChannel(_parent.Host, _state, Ch);
if (parent._initStateAction != null)
{
parent._initStateAction(_state);
}
var appendedDataView = new DataViewConstructionUtils.SingleRowLoopDataView <TDst>(parent.Host, _parent._addedSchema);
appendedDataView.SetCurrentRowObject(_dst);
Func <int, bool> appendedPredicate =
col =>
{
col = _parent._bindings.AddedColumnIndices[col];
return(predicate(col));
};
_appendedRow = appendedDataView.GetRowCursor(appendedPredicate);
}
public Cursor(IHost host, MapTransform <TSrc, TDst> owner, IRowCursor <TSrc> input, Func <int, bool> predicate)
: base(host, input)
{
Ch.AssertValue(owner);
Ch.AssertValue(input);
Ch.AssertValue(predicate);
_src = new TSrc();
_dst = new TDst();
_row = new Row(input, owner, predicate, _src, _dst);
CursorChannelAttribute.TrySetCursorChannel(host, _src, Ch);
CursorChannelAttribute.TrySetCursorChannel(host, _dst, Ch);
}