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(StatefulFilterTransform <TSrc, TDst, TState> parent, RowCursor <TSrc> input, IEnumerable <DataViewSchema.Column> columnsNeeded) : base(parent.Host) { Ch.AssertValue(input); Ch.AssertValue(columnsNeeded); _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); parent._initStateAction?.Invoke(_state); var appendedDataView = new DataViewConstructionUtils.SingleRowLoopDataView <TDst>(parent.Host, _parent._addedSchema); appendedDataView.SetCurrentRowObject(_dst); var columnNames = columnsNeeded.Select(c => c.Name); _appendedRow = appendedDataView.GetRowCursor(appendedDataView.Schema.Where(c => !c.IsHidden && columnNames.Contains(c.Name))); }
public Row(IRow <TSrc> input, MapTransform <TSrc, TDst> parent, Func <int, bool> active, TSrc src, TDst dst) { _input = input; _parent = parent; _schema = parent.Schema; _active = Utils.BuildArray(_schema.ColumnCount, active); _src = src; _dst = dst; _lastServedPosition = -1; _appendedRow = _parent.GetAppendedRow(active, _dst); }
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); }
public Cursor(RowToRowMapper parent, DataViewRowCursor input, bool[] active) : base(parent.Host, input) { Ch.AssertValue(parent); Ch.Assert(active == null || active.Length == parent.OutputSchema.Count); _parent = parent; _active = active; _getters = new Delegate[parent._parent.AddedSchema.Columns.Length]; var dstRow = new DataViewConstructionUtils.InputRow <TDst>(_parent.Host, _parent._parent.AddedSchema); IRowReadableAs <TSrc> inputRow = _parent._typedSrc.GetRow(input); TSrc src = new TSrc(); TState state = new TState(); TDst dst = new TDst(); _parent._parent._stateInitAction(state); long lastServedPosition = -1; Action refresh = () => { if (lastServedPosition != input.Position) { inputRow.FillValues(src); _parent._parent._mapAction(src, dst, state); dstRow.ExtractValues(dst); lastServedPosition = input.Position; } }; for (int i = 0; i < active.Length; i++) { var iinfo = _parent._bindings.MapColumnIndex(out var isSrc, i); if (isSrc) { continue; } _getters[iinfo] = Utils.MarshalInvoke(_parent.GetDstGetter <int>, _parent._bindings.Schema[i].Type.RawType, dstRow, _parent._bindings.Schema[i].Name, refresh); } }
public Delegate[] CreateGetters(IRow input, Func <int, bool> activeOutput, out Action disposer) { disposer = null; // If no outputs are active, we short-circuit to empty array of getters. var result = new Delegate[_parent.AddedSchema.Columns.Length]; if (!Enumerable.Range(0, result.Length).Any(activeOutput)) { return(result); } var dstRow = new DataViewConstructionUtils.InputRow <TDst>(_host, _parent.AddedSchema); IRowReadableAs <TSrc> inputRow = _typedSrc.GetRow(input); TSrc src = new TSrc(); TDst dst = new TDst(); long lastServedPosition = -1; Action refresh = () => { if (lastServedPosition != input.Position) { inputRow.FillValues(src); _parent._mapAction(src, dst); dstRow.ExtractValues(dst); lastServedPosition = input.Position; } }; for (int i = 0; i < result.Length; i++) { if (!activeOutput(i)) { continue; } result[i] = Utils.MarshalInvoke(GetDstGetter <int>, dstRow.Schema[i].Type.RawType, dstRow, i, refresh); } return(result); }
protected override Delegate[] CreateGetters(DataViewRow input, IEnumerable <DataViewSchema.Column> activeColumns, out Action disp) { disp = null; var getters = new Delegate[_parent.AddedSchema.Columns.Length]; var dstRow = new DataViewConstructionUtils.InputRow <TDst>(Host, _parent.AddedSchema); IRowReadableAs <TSrc> inputRow = _typedSrc.GetRow(input); TSrc src = new TSrc(); TState state = new TState(); TDst dst = new TDst(); _parent._stateInitAction(state); long lastServedPosition = -1; Action refresh = () => { if (lastServedPosition != input.Position) { inputRow.FillValues(src); _parent._mapAction(src, dst, state); dstRow.ExtractValues(dst); lastServedPosition = input.Position; } }; foreach (var col in activeColumns) { var iinfo = _bindings.MapColumnIndex(out var isSrc, col.Index); if (isSrc) { continue; } getters[iinfo] = Utils.MarshalInvoke(GetDstGetter <int>, col.Type.RawType, dstRow, col.Name, refresh); } return(getters); }