internal PredictorModelImpl(IHostEnvironment env, RoleMappedData trainingData, IDataView startingData, IPredictor predictor)
{
Contracts.CheckValue(env, nameof(env));
env.CheckValue(trainingData, nameof(trainingData));
env.CheckValue(predictor, nameof(predictor));
TransformModel = new TransformModelImpl(env, trainingData.Data, startingData);
_roleMappings = trainingData.Schema.GetColumnRoleNames().ToArray();
Predictor = predictor;
}
internal PredictorModelImpl(IHostEnvironment env, Stream stream)
{
Contracts.CheckValue(env, nameof(env));
env.CheckValue(stream, nameof(stream));
using (var ch = env.Start("Loading predictor model"))
{
// REVIEW: address the asymmetry in the way we're loading and saving the model.
TransformModel = new TransformModelImpl(env, stream);
var roles = ModelFileUtils.LoadRoleMappingsOrNull(env, stream);
env.CheckDecode(roles != null, "Predictor model must contain role mappings");
_roleMappings = roles.ToArray();
Predictor = ModelFileUtils.LoadPredictorOrNull(env, stream);
env.CheckDecode(Predictor != null, "Predictor model must contain a predictor");
}
}