// Computes the types of the columns and constructs the kvMaps.
private void ComputeKvMaps(ISchema schema, out ColumnType[] types, out KeyToValueMap[] kvMaps)
{
types = new ColumnType[_parent.ColumnPairs.Length];
kvMaps = new KeyToValueMap[_parent.ColumnPairs.Length];
for (int iinfo = 0; iinfo < types.Length; iinfo++)
{
// Construct kvMaps.
Contracts.Assert(types[iinfo] == null);
var typeSrc = schema.GetColumnType(ColMapNewToOld[iinfo]);
var typeVals = schema.GetMetadataTypeOrNull(MetadataUtils.Kinds.KeyValues, ColMapNewToOld[iinfo]);
Host.Check(typeVals != null, "Metadata KeyValues does not exist");
Host.Check(typeVals.VectorSize == typeSrc.ItemType.KeyCount, "KeyValues metadata size does not match column type key count");
if (!typeSrc.IsVector)
{
types[iinfo] = typeVals.ItemType;
}
else
{
types[iinfo] = new VectorType(typeVals.ItemType.AsPrimitive, typeSrc.AsVector);
}
// MarshalInvoke with two generic params.
Func <int, ColumnType, ColumnType, KeyToValueMap> func = GetKeyMetadata <int, int>;
var meth = func.GetMethodInfo().GetGenericMethodDefinition().MakeGenericMethod(
new Type[] { typeSrc.ItemType.RawType, types[iinfo].ItemType.RawType });
kvMaps[iinfo] = (KeyToValueMap)meth.Invoke(this, new object[] { iinfo, typeSrc, typeVals });
}
}
// Computes the types of the columns and constructs the kvMaps.
private void ComputeKvMaps(Schema schema, out ColumnType[] types, out KeyToValueMap[] kvMaps)
{
types = new ColumnType[_parent.ColumnPairs.Length];
kvMaps = new KeyToValueMap[_parent.ColumnPairs.Length];
for (int iinfo = 0; iinfo < types.Length; iinfo++)
{
// Construct kvMaps.
Contracts.Assert(types[iinfo] == null);
var typeSrc = schema[ColMapNewToOld[iinfo]].Type;
var typeVals = schema[ColMapNewToOld[iinfo]].Metadata.Schema.GetColumnOrNull(MetadataUtils.Kinds.KeyValues)?.Type;
Host.Check(typeVals != null, "Metadata KeyValues does not exist");
Host.Check(typeVals.VectorSize == typeSrc.ItemType.KeyCount, "KeyValues metadata size does not match column type key count");
if (!(typeSrc is VectorType vectorType))
{
types[iinfo] = typeVals.ItemType;
}
// Computes the types of the columns and constructs the kvMaps.
private void ComputeKvMaps(DataViewSchema schema, out DataViewType[] types, out KeyToValueMap[] kvMaps)
{
types = new DataViewType[_parent.ColumnPairs.Length];
kvMaps = new KeyToValueMap[_parent.ColumnPairs.Length];
for (int iinfo = 0; iinfo < types.Length; iinfo++)
{
// Construct kvMaps.
Contracts.Assert(types[iinfo] == null);
var typeSrc = schema[ColMapNewToOld[iinfo]].Type;
var typeVals = schema[ColMapNewToOld[iinfo]].Annotations.Schema.GetColumnOrNull(AnnotationUtils.Kinds.KeyValues)?.Type;
Host.Check(typeVals != null, "Metadata KeyValues does not exist");
DataViewType valsItemType = typeVals.GetItemType();
DataViewType srcItemType = typeSrc.GetItemType();
Host.Check(typeVals.GetVectorSize() == srcItemType.GetKeyCountAsInt32(Host), "KeyValues metadata size does not match column type key count");
if (!(typeSrc is VectorDataViewType vectorType))
{
types[iinfo] = valsItemType;
}
// Computes the types of the columns and constructs the kvMaps.
private void ComputeKVMapsAndMetadata(out ColumnType[] types, out KeyToValueMap[] kvMaps)
{
Contracts.Assert(Utils.Size(Infos) > 0);
var md = Metadata;
types = new ColumnType[Infos.Length];
kvMaps = new KeyToValueMap[Infos.Length];
for (int iinfo = 0; iinfo < types.Length; iinfo++)
{
// Inherit slot names from source.
using (var bldr = md.BuildMetadata(iinfo, Source.Schema, Infos[iinfo].Source, MetadataUtils.Kinds.SlotNames))
{
}
// Construct kvMaps.
Contracts.Assert(types[iinfo] == null);
var typeSrc = Infos[iinfo].TypeSrc;
var typeVals = Source.Schema.GetMetadataTypeOrNull(MetadataUtils.Kinds.KeyValues, Infos[iinfo].Source);
Host.Check(typeVals != null, "Metadata KeyValues does not exist");
Host.Check(typeVals.VectorSize == typeSrc.ItemType.KeyCount, "KeyValues metadata size does not match column type key count");
if (!typeSrc.IsVector)
{
types[iinfo] = typeVals.ItemType;
}
else
{
types[iinfo] = new VectorType(typeVals.ItemType.AsPrimitive, typeSrc.AsVector);
}
Func <int, ColumnType, ColumnType, KeyToValueMap> func = GetKeyMetadata <int, int>;
var meth = func.GetMethodInfo().GetGenericMethodDefinition().MakeGenericMethod(new Type[] { typeSrc.ItemType.RawType,
types[iinfo].ItemType.RawType });
kvMaps[iinfo] = (KeyToValueMap)meth.Invoke(this, new object[] { iinfo, typeSrc, typeVals });
}
md.Seal();
}
