public override Schema.Column[] GetOutputColumns()
{
var result = new Schema.Column[_parent.ColumnPairs.Length];
for (int iinfo = 0; iinfo < _infos.Length; iinfo++)
{
InputSchema.TryGetColumnIndex(_infos[iinfo].Input, out int colIndex);
Host.Assert(colIndex >= 0);
var builder = new Schema.Metadata.Builder();
builder.Add(InputSchema[colIndex].Metadata, x => x == MetadataUtils.Kinds.SlotNames);
ValueGetter <bool> getter = (ref bool dst) =>
{
dst = true;
};
builder.Add(new Schema.Column(MetadataUtils.Kinds.IsNormalized, BoolType.Instance, null), getter);
result[iinfo] = new Schema.Column(_infos[iinfo].Output, _infos[iinfo].OutputType, builder.GetMetadata());
}
return(result);
}
private void AddMetadata(int iinfo, Schema.Metadata.Builder builder)
{
builder.Add(InputSchema[_parent.ColumnPairs[iinfo].input].Metadata, name => name == MetadataUtils.Kinds.SlotNames);
ValueGetter <VBuffer <ReadOnlyMemory <char> > > getter =
(ref VBuffer <ReadOnlyMemory <char> > dst) =>
{
GetKeyValues(iinfo, ref dst);
};
builder.AddKeyValues(CharsCount, TextType.Instance, getter);
}
public override Schema.Column[] GetOutputColumns()
{
var result = new Schema.Column[_parent.ColumnPairs.Length];
for (int i = 0; i < _parent.ColumnPairs.Length; i++)
{
var meta = new Schema.Metadata.Builder();
meta.Add(InputSchema[ColMapNewToOld[i]].Metadata, name => name == MetadataUtils.Kinds.SlotNames);
result[i] = new Schema.Column(_parent.ColumnPairs[i].output, _types[i], meta.GetMetadata());
}
return(result);
}
public override Schema.Column[] GetOutputColumns()
{
var result = new Schema.Column[_parent.ColumnPairs.Length];
for (int i = 0; i < _parent.ColumnPairs.Length; i++)
{
var builder = new Schema.Metadata.Builder();
builder.Add(InputSchema[ColMapNewToOld[i]].Metadata, x => x == MetadataUtils.Kinds.KeyValues || x == MetadataUtils.Kinds.IsNormalized);
result[i] = new Schema.Column(_parent.ColumnPairs[i].output, _types[i], builder.GetMetadata());
}
return(result);
}
private void CheckInputColumnTypes(Schema schema, out ColumnType labelType, out ColumnType scoreType,
out Schema.Metadata labelMetadata, out Schema.Metadata scoreMetadata)
{
Host.AssertNonEmpty(ScoreCol);
Host.AssertNonEmpty(LabelCol);
var t = schema.GetColumnType(LabelIndex);
if (!t.IsKnownSizeVector || (t.ItemType != NumberType.R4 && t.ItemType != NumberType.R8))
{
throw Host.Except("Label column '{0}' has type '{1}' but must be a known-size vector of R4 or R8", LabelCol, t);
}
labelType = new VectorType(t.ItemType.AsPrimitive, t.VectorSize);
var slotNamesType = new VectorType(TextType.Instance, t.VectorSize);
var builder = new Schema.Metadata.Builder();
builder.AddSlotNames(t.VectorSize, CreateSlotNamesGetter(schema, LabelIndex, labelType.VectorSize, "True"));
labelMetadata = builder.GetMetadata();
t = schema.GetColumnType(ScoreIndex);
if (t.VectorSize == 0 || t.ItemType != NumberType.Float)
{
throw Host.Except("Score column '{0}' has type '{1}' but must be a known length vector of type R4", ScoreCol, t);
}
scoreType = new VectorType(t.ItemType.AsPrimitive, t.VectorSize);
builder = new Schema.Metadata.Builder();
builder.AddSlotNames(t.VectorSize, CreateSlotNamesGetter(schema, ScoreIndex, scoreType.VectorSize, "Predicted"));
ValueGetter <ReadOnlyMemory <char> > getter = GetScoreColumnKind;
builder.Add(new Schema.Column(MetadataUtils.Kinds.ScoreColumnKind, TextType.Instance, null), getter);
getter = GetScoreValueKind;
builder.Add(new Schema.Column(MetadataUtils.Kinds.ScoreValueKind, TextType.Instance, null), getter);
ValueGetter <uint> uintGetter = GetScoreColumnSetId(schema);
builder.Add(new Schema.Column(MetadataUtils.Kinds.ScoreColumnSetId, MetadataUtils.ScoreColumnSetIdType, null), uintGetter);
scoreMetadata = builder.GetMetadata();
}
internal static Schema.Column[] GetSchemaColumns(InternalSchemaDefinition schemaDefn)
{
Contracts.AssertValue(schemaDefn);
var columns = new Schema.Column[schemaDefn.Columns.Length];
for (int i = 0; i < columns.Length; i++)
{
var col = schemaDefn.Columns[i];
var meta = new Schema.Metadata.Builder();
foreach (var kvp in col.Metadata)
{
meta.Add(new Schema.Column(kvp.Value.Kind, kvp.Value.MetadataType, null), kvp.Value.GetGetterDelegate());
}
columns[i] = new Schema.Column(col.ColumnName, col.ColumnType, meta.GetMetadata());
}
return(columns);
}