public ColInfoEx(Column item, Arguments args)
{
NgramLength = item.NgramLength ?? args.NgramLength;
Contracts.CheckUserArg(0 < NgramLength && NgramLength <= NgramBufferBuilder.MaxSkipNgramLength, nameof(item.NgramLength));
SkipLength = item.SkipLength ?? args.SkipLength;
Contracts.CheckUserArg(0 <= SkipLength && SkipLength <= NgramBufferBuilder.MaxSkipNgramLength, nameof(item.SkipLength));
if (NgramLength + SkipLength > NgramBufferBuilder.MaxSkipNgramLength)
{
throw Contracts.ExceptUserArg(nameof(item.SkipLength),
"The sum of skipLength and ngramLength must be less than or equal to {0}",
NgramBufferBuilder.MaxSkipNgramLength);
}
Contracts.CheckUserArg(Enum.IsDefined(typeof(WeightingCriteria), args.Weighting), nameof(args.Weighting));
Weighting = item.Weighting ?? args.Weighting;
NonEmptyLevels = new bool[NgramLength];
}
public ColInfoEx(ModelLoadContext ctx, bool readWeighting)
{
Contracts.AssertValue(ctx);
// *** Binary format ***
// int: NgramLength
// int: SkipLength
// int: Weighting Criteria (if readWeighting == true)
// bool[NgramLength]: NonEmptyLevels
NgramLength = ctx.Reader.ReadInt32();
Contracts.CheckDecode(0 < NgramLength && NgramLength <= NgramBufferBuilder.MaxSkipNgramLength);
SkipLength = ctx.Reader.ReadInt32();
Contracts.CheckDecode(0 <= SkipLength && SkipLength <= NgramBufferBuilder.MaxSkipNgramLength);
Contracts.CheckDecode(NgramLength <= NgramBufferBuilder.MaxSkipNgramLength - SkipLength);
if (readWeighting)
{
Weighting = (WeightingCriteria)ctx.Reader.ReadInt32();
}
Contracts.CheckDecode(Enum.IsDefined(typeof(WeightingCriteria), Weighting));
NonEmptyLevels = ctx.Reader.ReadBoolArray(NgramLength);
}
