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");
}
}
public void SetInputFromPath(GraphRunner runner, string varName, string path, TlcModule.DataKind kind)
{
_host.CheckUserArg(runner != null, nameof(runner), "Provide a GraphRunner instance.");
_host.CheckUserArg(!string.IsNullOrWhiteSpace(varName), nameof(varName), "Specify a graph variable name.");
_host.CheckUserArg(!string.IsNullOrWhiteSpace(path), nameof(path), "Specify a valid file path.");
switch (kind)
{
case TlcModule.DataKind.FileHandle:
var fh = new SimpleFileHandle(_host, path, false, false);
runner.SetInput(varName, fh);
break;
case TlcModule.DataKind.DataView:
IDataView loader = new BinaryLoader(_host, new BinaryLoader.Arguments(), path);
runner.SetInput(varName, loader);
break;
case TlcModule.DataKind.PredictorModel:
PredictorModelImpl pm;
using (var fs = File.OpenRead(path))
pm = new PredictorModelImpl(_host, fs);
runner.SetInput(varName, pm);
break;
case TlcModule.DataKind.TransformModel:
TransformModelImpl tm;
using (var fs = File.OpenRead(path))
tm = new TransformModelImpl(_host, fs);
runner.SetInput(varName, tm);
break;
default:
throw _host.Except("Port type {0} not supported", kind);
}
}