/// <summary>
/// Get the value of the metadata, by metadata kind (aka column name).
/// </summary>
public void GetValue <TValue>(string kind, ref TValue value)
{
var column = Schema.GetColumnOrNull(kind);
if (column == null)
{
throw MetadataUtils.ExceptGetMetadata();
}
GetGetter <TValue>(column.Value.Index)(ref value);
}
/// <summary>
/// Get a getter delegate for one value of the metadata row.
/// </summary>
public ValueGetter <TValue> GetGetter <TValue>(int col)
{
Contracts.CheckParam(0 <= col && col < Schema.Count, nameof(col));
var typedGetter = Getters[col] as ValueGetter <TValue>;
if (typedGetter == null)
{
Contracts.Assert(Getters[col] != null);
throw MetadataUtils.ExceptGetMetadata();
}
return(typedGetter);
}
public void GetMetadata <TValue>(string kind, int col, ref TValue value)
{
_ectx.CheckParam(col == 0, nameof(col));
if (kind == MetadataUtils.Kinds.SlotNames && _hasSlotNames)
{
_parentSchema[_featureCol].Metadata.GetValue(kind, ref value);
}
else
{
throw MetadataUtils.ExceptGetMetadata();
}
}
protected override void GetMetadataCore <TValue>(string kind, int iinfo, ref TValue value)
{
Contracts.Assert(0 <= iinfo && iinfo < InfoCount);
switch (kind)
{
case MetadataUtils.Kinds.ScoreColumnSetId:
_getScoreColumnSetId.Marshal(iinfo, ref value);
break;
default:
if (iinfo < DerivedColumnCount)
{
throw MetadataUtils.ExceptGetMetadata();
}
Mapper.OutputSchema[iinfo - DerivedColumnCount].Metadata.GetValue(kind, ref value);
break;
}
}
/// <summary>
/// Assumes all columns have ScoreColumnKind and ScoreValueKind.
/// </summary>
public virtual void GetMetadata <TValue>(string kind, int col, ref TValue value)
{
Contracts.CheckNonEmpty(kind, nameof(kind));
Contracts.CheckParam(0 <= col && col < ColumnCount, nameof(col));
switch (kind)
{
case MetadataUtils.Kinds.ScoreColumnKind:
ScoreColumnKindGetter.Marshal(col, ref value);
break;
case MetadataUtils.Kinds.ScoreValueKind:
ScoreValueKindGetter.Marshal(col, ref value);
break;
default:
throw MetadataUtils.ExceptGetMetadata();
}
}
protected virtual void GetMetadataCore <TValue>(string kind, int iinfo, ref TValue value)
{
Contracts.AssertNonEmpty(kind);
Contracts.Assert(0 <= iinfo && iinfo < InfoCount);
throw MetadataUtils.ExceptGetMetadata();
}