protected override bool TryParse(string str) { Contracts.AssertNonEmpty(str); // We accept N:T:S where N is the new column name, T is the new type, // and S is source column names. string extra; if (!base.TryParse(str, out extra)) { return(false); } if (extra == null) { return(true); } InternalDataKind kind; if (!TypeParsingUtils.TryParseDataKind(extra, out kind, out KeyCount)) { return(false); } ResultType = InternalDataKind2DataKind(kind); return(true); }
private protected override bool TryParse(string str) { Contracts.AssertNonEmpty(str); // We accept N:T:S where N is the new column name, T is the new type, // and S is source column names. if (!base.TryParse(str, out string extra)) return false; if (extra == null) return true; if (!TypeParsingUtils.TryParseDataKind(extra, out DataKind kind, out KeyCount)) return false; ResultType = kind == default ? default(DataKind?) : kind; return true; }
private static bool TryCreateEx(IExceptionContext ectx, ColInfo info, DataKind kind, KeyCount range, out PrimitiveDataViewType itemType, out ColInfoEx ex) { ectx.AssertValue(info); ectx.Assert(Enum.IsDefined(typeof(DataKind), kind)); ex = null; var typeSrc = info.TypeSrc; if (range != null) { itemType = TypeParsingUtils.ConstructKeyType(SchemaHelper.DataKind2InternalDataKind(kind), range); } else if (!typeSrc.ItemType().IsKey()) { itemType = ColumnTypeHelper.PrimitiveFromKind(kind); } else if (!ColumnTypeHelper.IsValidDataKind(kind)) { itemType = ColumnTypeHelper.PrimitiveFromKind(kind); return(false); } else { var key = typeSrc.ItemType().AsKey(); ectx.Assert(ColumnTypeHelper.IsValidDataKind(key.RawKind())); ulong count = key.Count; // Technically, it's an error for the counts not to match, but we'll let the Conversions // code return false below. There's a possibility we'll change the standard conversions to // map out of bounds values to zero, in which case, this is the right thing to do. ulong max = (ulong)kind; if ((ulong)count > max) { count = max; } itemType = new KeyDataViewType(SchemaHelper.DataKind2ColumnType(kind).RawType, count); } // Ensure that the conversion is legal. We don't actually cache the delegate here. It will get // re-fetched by the utils code when needed. bool identity; Delegate del; if (!Conversions.DefaultInstance.TryGetStandardConversion(typeSrc.ItemType(), itemType, out del, out identity)) { if (typeSrc.ItemType().RawKind() == itemType.RawKind()) { switch (typeSrc.ItemType().RawKind()) { case DataKind.UInt32: // Key starts at 1. // Multiclass future issue uint plus = (itemType.IsKey() ? (uint)1 : (uint)0) - (typeSrc.IsKey() ? (uint)1 : (uint)0); identity = false; ValueMapper <uint, uint> map_ = (in uint src, ref uint dst) => { dst = src + plus; }; del = (Delegate)map_; if (del == null) { throw Contracts.ExceptNotSupp("Issue with casting"); } break; default: throw Contracts.Except("Not suppoted type {0}", typeSrc.ItemType().RawKind()); } } else if (typeSrc.ItemType().RawKind() == DataKind.Int64 && kind == DataKind.UInt64) { ulong plus = (itemType.IsKey() ? (ulong)1 : (ulong)0) - (typeSrc.IsKey() ? (ulong)1 : (ulong)0); identity = false; ValueMapper <long, ulong> map_ = (in long src, ref ulong dst) => { CheckRange(src, dst, ectx); dst = (ulong)src + plus; }; del = (Delegate)map_; if (del == null) { throw Contracts.ExceptNotSupp("Issue with casting"); } } else if (typeSrc.ItemType().RawKind() == DataKind.Single && kind == DataKind.UInt64) { ulong plus = (itemType.IsKey() ? (ulong)1 : (ulong)0) - (typeSrc.IsKey() ? (ulong)1 : (ulong)0); identity = false; ValueMapper <float, ulong> map_ = (in float src, ref ulong dst) => { CheckRange(src, dst, ectx); dst = (ulong)src + plus; }; del = (Delegate)map_; if (del == null) { throw Contracts.ExceptNotSupp("Issue with casting"); } } else if (typeSrc.ItemType().RawKind() == DataKind.Int64 && kind == DataKind.UInt32) { // Multiclass future issue uint plus = (itemType.IsKey() ? (uint)1 : (uint)0) - (typeSrc.IsKey() ? (uint)1 : (uint)0); identity = false; ValueMapper <long, uint> map_ = (in long src, ref uint dst) => { CheckRange(src, dst, ectx); dst = (uint)src + plus; }; del = (Delegate)map_; if (del == null) { throw Contracts.ExceptNotSupp("Issue with casting"); } } else if (typeSrc.ItemType().RawKind() == DataKind.Single && kind == DataKind.UInt32) { // Multiclass future issue uint plus = (itemType.IsKey() ? (uint)1 : (uint)0) - (typeSrc.IsKey() ? (uint)1 : (uint)0); identity = false; ValueMapper <float, uint> map_ = (in float src, ref uint dst) => { CheckRange(src, dst, ectx); dst = (uint)src + plus; }; del = (Delegate)map_; if (del == null) { throw Contracts.ExceptNotSupp("Issue with casting"); } } else if (typeSrc.ItemType().RawKind() == DataKind.Single && kind == DataKind.String) { // Multiclass future issue identity = false; ValueMapper <float, DvText> map_ = (in float src, ref DvText dst) => { dst = new DvText(string.Format("{0}", (int)src)); }; del = (Delegate)map_; if (del == null) { throw Contracts.ExceptNotSupp("Issue with casting"); } } else { return(false); } } DataViewType typeDst = itemType; if (typeSrc.IsVector()) { typeDst = new VectorDataViewType(itemType, typeSrc.AsVector().Dimensions.ToArray()); } // An output column is transposable iff the input column was transposable. VectorDataViewType slotType = null; if (info.SlotTypeSrc != null) { slotType = new VectorDataViewType(itemType, info.SlotTypeSrc.Dimensions.ToArray()); } ex = new ColInfoEx(kind, range != null, typeDst, slotType); return(true); }
private static bool TryCreateEx(IExceptionContext ectx, ColInfo info, DataKind kind, KeyRange range, out PrimitiveType itemType, out ColInfoEx ex) { ectx.AssertValue(info); ectx.Assert(Enum.IsDefined(typeof(DataKind), kind)); ex = null; var typeSrc = info.TypeSrc; if (range != null) { itemType = TypeParsingUtils.ConstructKeyType(kind, range); if (!typeSrc.ItemType.IsKey && !typeSrc.ItemType.IsText) { return(false); } } else if (!typeSrc.ItemType.IsKey) { itemType = PrimitiveType.FromKind(kind); } else if (!KeyType.IsValidDataKind(kind)) { itemType = PrimitiveType.FromKind(kind); return(false); } else { var key = typeSrc.ItemType.AsKey; ectx.Assert(KeyType.IsValidDataKind(key.RawKind)); int count = key.Count; // Technically, it's an error for the counts not to match, but we'll let the Conversions // code return false below. There's a possibility we'll change the standard conversions to // map out of bounds values to zero, in which case, this is the right thing to do. ulong max = kind.ToMaxInt(); if ((ulong)count > max) { count = (int)max; } itemType = new KeyType(kind, key.Min, count, key.Contiguous); } // Ensure that the conversion is legal. We don't actually cache the delegate here. It will get // re-fetched by the utils code when needed. bool identity; Delegate del; if (!Runtime.Data.Conversion.Conversions.Instance.TryGetStandardConversion(typeSrc.ItemType, itemType, out del, out identity)) { return(false); } ColumnType typeDst = itemType; if (typeSrc.IsVector) { typeDst = new VectorType(itemType, typeSrc.AsVector); } // An output column is transposable iff the input column was transposable. VectorType slotType = null; if (info.SlotTypeSrc != null) { slotType = new VectorType(itemType, info.SlotTypeSrc); } ex = new ColInfoEx(kind, range != null, typeDst, slotType); return(true); }