internal bool IsCompatibleWith(Column source)
{
Contracts.Check(source.IsValid, nameof(source));
if (Name != source.Name)
{
return(false);
}
if (Kind != source.Kind)
{
return(false);
}
if (!ItemType.Equals(source.ItemType))
{
return(false);
}
if (IsKey != source.IsKey)
{
return(false);
}
foreach (var annotationCol in Annotations)
{
if (!source.Annotations.TryFindColumn(annotationCol.Name, out var inputAnnotationCol))
{
return(false);
}
if (!annotationCol.IsCompatibleWith(inputAnnotationCol))
{
return(false);
}
}
return(true);
}
internal bool IsCompatibleWith(Column source)
{
Contracts.Check(source.IsValid, nameof(source));
if (Name != source.Name)
{
return(false);
}
if (Kind != source.Kind)
{
return(false);
}
if (!ItemType.Equals(source.ItemType))
{
return(false);
}
if (IsKey != source.IsKey)
{
return(false);
}
foreach (var metaCol in Metadata)
{
if (!source.Metadata.TryFindColumn(metaCol.Name, out var inputMetaCol))
{
return(false);
}
if (!metaCol.IsCompatibleWith(inputMetaCol))
{
return(false);
}
}
return(true);
}
protected bool EqualTypes(DataViewType type1, DataViewType type2, bool exactTypes)
{
Contracts.AssertValue(type1);
Contracts.AssertValue(type2);
if (type1.Equals(type2))
{
return(true);
}
return(!exactTypes && type1 is VectorDataViewType vt1 && type2 is VectorDataViewType vt2 && vt1.ItemType.Equals(vt2.ItemType) && vt1.Size == vt2.Size);
}
private ColumnCodec[] GetActiveColumns(DataViewSchema schema, int[] colIndices)
{
_host.AssertValue(schema);
_host.AssertValueOrNull(colIndices);
ColumnCodec[] activeSourceColumns = new ColumnCodec[Utils.Size(colIndices)];
if (Utils.Size(colIndices) == 0)
{
return(activeSourceColumns);
}
for (int c = 0; c < colIndices.Length; ++c)
{
DataViewType type = schema[colIndices[c]].Type;
IValueCodec codec;
if (!_factory.TryGetCodec(type, out codec))
{
throw _host.Except("Could not get codec for requested column {0} of type {1}", schema[c].Name, type);
}
_host.Assert(type.Equals(codec.Type));
activeSourceColumns[c] = new ColumnCodec(colIndices[c], codec);
}
return(activeSourceColumns);
}
private BoundColumn MakeColumn(DataViewSchema inputSchema, int iinfo)
{
Contracts.AssertValue(inputSchema);
Contracts.Assert(0 <= iinfo && iinfo < _parent._columns.Length);
DataViewType itemType = null;
int[] sources = new int[_parent._columns[iinfo].Sources.Count];
// Go through the columns, and establish the following:
// - indices of input columns in the input schema. Throw if they are not there.
// - output type. Throw if the types of inputs are not the same.
// - how many slots are there in the output vector (or variable). Denoted by totalSize.
// - total size of CategoricalSlotRanges metadata, if present. Denoted by catCount.
// - whether the column is normalized.
// It is true when ALL inputs are normalized (and of numeric type).
// - whether the column has slot names.
// It is true if ANY input is a scalar, or has slot names.
// - whether the column has categorical slot ranges.
// It is true if ANY input has this metadata.
int totalSize = 0;
int catCount = 0;
bool isNormalized = true;
bool hasSlotNames = false;
bool hasCategoricals = false;
for (int i = 0; i < _parent._columns[iinfo].Sources.Count; i++)
{
var(srcName, srcAlias) = _parent._columns[iinfo].Sources[i];
if (!inputSchema.TryGetColumnIndex(srcName, out int srcCol))
{
throw Host.ExceptSchemaMismatch(nameof(inputSchema), "input", srcName);
}
sources[i] = srcCol;
var curType = inputSchema[srcCol].Type;
VectorType curVectorType = curType as VectorType;
DataViewType currentItemType = curVectorType?.ItemType ?? curType;
int currentValueCount = curVectorType?.Size ?? 1;
if (itemType == null)
{
itemType = currentItemType;
totalSize = currentValueCount;
}
else if (currentItemType.Equals(itemType))
{
// If any one input is variable length, then the output is variable length.
if (totalSize == 0 || currentValueCount == 0)
{
totalSize = 0;
}
else
{
totalSize += currentValueCount;
}
}
else
{
throw Host.ExceptSchemaMismatch(nameof(inputSchema), "input", srcName, itemType.ToString(), curType.ToString());
}
if (isNormalized && !inputSchema[srcCol].IsNormalized())
{
isNormalized = false;
}
if (AnnotationUtils.TryGetCategoricalFeatureIndices(inputSchema, srcCol, out int[] typeCat))