Revize 3c4b53fe

Re #9049 Implemented Rollback method

Server/ServerApp/Predictor/NaiveBayesClassifier.cs

@@ -47 +47 @@
             this._predictionEngine = _mlContext.Model.CreatePredictionEngine<ModelInput, ModelOutput>(this._trainedModel);
         }
 
+        public void Save(string filename)
+        {
+            if (this._trainingDataView is null)
+            {
+                throw new NullReferenceException("DataView is not set.");
+            }
+            if( this._trainedModel is null)
+            {
+                throw new NullReferenceException("Trained model instance does not exist. This predictor has not been trained yet.");
+            }
+            if(filename is null)
+            {
+                throw new ArgumentNullException(nameof(filename));
+            }
+            this._mlContext.Model.Save(this._trainedModel, this._trainingDataView.Schema, filename);
+        }
+
         public void Fit(IEnumerable<ModelInput> trainInput)
         {
             this._trainingDataView = _mlContext.Data.LoadFromEnumerable(trainInput);