protected PredictedLabelScorerBase(ScorerArgumentsBase args, IHostEnvironment env, IDataView data,
ISchemaBoundMapper mapper, RoleMappedSchema trainSchema, string registrationName, string scoreColKind, string scoreColName,
Func <ColumnType, bool> outputTypeMatches, Func <ColumnType, ISchemaBoundRowMapper, ColumnType> getPredColType)
: base(env, data, registrationName, Contracts.CheckRef(mapper, nameof(mapper)).Bindable)
{
Host.CheckValue(args, nameof(args));
Host.CheckNonEmpty(scoreColKind, nameof(scoreColKind));
Host.CheckNonEmpty(scoreColName, nameof(scoreColName));
Host.CheckValue(outputTypeMatches, nameof(outputTypeMatches));
Host.CheckValue(getPredColType, nameof(getPredColType));
var rowMapper = mapper as ISchemaBoundRowMapper;
Host.CheckParam(rowMapper != null, nameof(mapper), "mapper should implement " + nameof(ISchemaBoundRowMapper));
int scoreColIndex;
if (!mapper.Schema.TryGetColumnIndex(scoreColName, out scoreColIndex))
{
throw Host.ExceptParam(nameof(scoreColName), "mapper does not contain a column '{0}'", scoreColName);
}
var scoreType = mapper.Schema.GetColumnType(scoreColIndex);
Host.Check(outputTypeMatches(scoreType), "Unexpected predictor output type");
var predColType = getPredColType(scoreType, rowMapper);
Bindings = BindingsImpl.Create(data.Schema, rowMapper, args.Suffix, scoreColKind, scoreColIndex, predColType);
}
/// <summary>
/// The <see cref="SignatureDataScorer"/> entry point for creating a <see cref="GenericScorer"/>.
/// </summary>
public GenericScorer(IHostEnvironment env, ScorerArgumentsBase args, IDataView data,
ISchemaBoundMapper mapper, RoleMappedSchema trainSchema)
: base(env, data, RegistrationName, Contracts.CheckRef(mapper, nameof(mapper)).Bindable)
{
Host.CheckValue(args, nameof(args));
Host.AssertValue(data, "data");
Host.AssertValue(mapper, "mapper");
var rowMapper = mapper as ISchemaBoundRowMapper;
Host.CheckParam(rowMapper != null, nameof(mapper), "mapper should implement ISchemaBoundRowMapper");
_bindings = Bindings.Create(data.Schema, rowMapper, args.Suffix);
}
