bool IsValid(IValueMapper mapper, ref DataViewType inputType)
{
// inputType
if (mapper == null)
{
return(false);
}
if (mapper.OutputType != NumberDataViewType.Single)
{
return(false);
}
if (!mapper.InputType.IsVector() || mapper.InputType.ItemType() != NumberDataViewType.Single)
{
return(false);
}
if (inputType == null)
{
inputType = mapper.InputType;
}
else if (inputType.VectorSize() != mapper.InputType.VectorSize())
{
if (inputType.VectorSize() == 0)
{
inputType = mapper.InputType;
}
else if (mapper.InputType.VectorSize() != 0)
{
return(false);
}
}
return(true);
}
public override ValueMapper <VBuffer <float>, VBuffer <float> > GetMapper()
{
var maps = new ValueMapper <VBuffer <float>, float, float> [_mappers.Length];
for (int i = 0; i < _mappers.Length; i++)
{
maps[i] = _mappers[i].GetMapper <VBuffer <float>, float, float>();
}
return
((in VBuffer <float> src, ref VBuffer <float> dst) =>
{
if (_inputType.VectorSize() > 0)
{
Contracts.Check(src.Length == _inputType.VectorSize());
}
var values = dst.Values;
if (Utils.Size(values) < maps.Length)
{
values = new float[maps.Length];
}
var tmp = src;
Parallel.For(0, maps.Length,
i =>
{
float score = 0;
maps[i](in tmp, ref score, ref values[i]);
});
