Microsoft.ML.Internal.Internallearn should be hidden/moved/renamed (#2740)

* Microsoft.ML.Internal.Internallearn should be hidden/moved/renamed

* PR feedback.

* Add EarlyStoppingCriteria.cs.

* merge conflicts.

Author: codemzs

src/Microsoft.ML.Data/Dirty/ModelParametersBase.cs

@@ -3,9 +3,8 @@
 // See the LICENSE file in the project root for more information.
 
 using System;
-using Microsoft.ML.Model;
 
-namespace Microsoft.ML.Internal.Internallearn
+namespace Microsoft.ML.Model
 {
     /// <summary>
     /// A base class for predictors producing <typeparamref name="TOutput"/>.

src/Microsoft.ML.Data/Dirty/PredictorInterfaces.cs

@@ -9,7 +9,7 @@
 using Microsoft.ML.Calibrators;
 using Microsoft.ML.Data;
 
-namespace Microsoft.ML.Internal.Internallearn
+namespace Microsoft.ML.Model
 {
     /// <summary>
     /// A generic interface for models that can average parameters from multiple instance of self

src/Microsoft.ML.Data/EntryPoints/SummarizePredictor.cs

@@ -9,7 +9,7 @@
 using Microsoft.ML.CommandLine;
 using Microsoft.ML.Data;
 using Microsoft.ML.EntryPoints;
-using Microsoft.ML.Internal.Internallearn;
+using Microsoft.ML.Model;
 
 [assembly: EntryPointModule(typeof(SummarizePredictor))]
 

src/Microsoft.ML.Data/Scorers/QuantileRegressionScorer.cs

@@ -8,7 +8,7 @@
 using Microsoft.ML;
 using Microsoft.ML.CommandLine;
 using Microsoft.ML.Data;
-using Microsoft.ML.Internal.Internallearn;
+using Microsoft.ML.Model;
 
 [assembly: LoadableClass(typeof(IDataScorerTransform), typeof(QuantileRegressionScorerTransform), typeof(QuantileRegressionScorerTransform.Arguments),
     typeof(SignatureDataScorer), "Quantile Regression Scorer", "QuantileRegressionScorer", AnnotationUtils.Const.ScoreColumnKind.QuantileRegression)]

src/Microsoft.ML.Data/Transforms/ExplainabilityCatalog.cs

@@ -3,7 +3,7 @@
 // See the LICENSE file in the project root for more information.
 
 using Microsoft.ML.Data;
-using Microsoft.ML.Internal.Internallearn;
+using Microsoft.ML.Model;
 
 namespace Microsoft.ML
 {

src/Microsoft.ML.Data/Training/EarlyStoppingCriteria.cs renamed to src/Microsoft.ML.FastTree/Training/EarlyStoppingCriteria.cs

@@ -6,7 +6,7 @@
 using Microsoft.ML;
 using Microsoft.ML.CommandLine;
 using Microsoft.ML.EntryPoints;
-using Microsoft.ML.Internal.Internallearn;
+using Microsoft.ML.Trainers.FastTree;
 using Float = System.Single;
 
 [assembly: LoadableClass(typeof(TolerantEarlyStoppingCriterion), typeof(TolerantEarlyStoppingCriterion.Options), typeof(SignatureEarlyStoppingCriterion), "Tolerant (TR)", "tr")]
@@ -21,12 +21,12 @@
 [assembly: EntryPointModule(typeof(PQEarlyStoppingCriterion))]
 [assembly: EntryPointModule(typeof(UPEarlyStoppingCriterion))]
 
-namespace Microsoft.ML.Internal.Internallearn
+namespace Microsoft.ML.Trainers.FastTree
 {
     internal delegate void SignatureEarlyStoppingCriterion(bool lowerIsBetter);
 
     // These criteria will be used in FastTree and NeuralNets.
-    public interface IEarlyStoppingCriterion
+    public abstract class IEarlyStoppingCriterion
     {
         /// <summary>
         /// Check if the learning should stop or not.
@@ -35,7 +35,7 @@ public interface IEarlyStoppingCriterion
         /// <param name="trainingScore">A non negative number. Higher score means better result unless "_lowerIsBetter" is true.</param>
         /// <param name="isBestCandidate">True if the current result is the best ever.</param>
         /// <returns>If true, the learning should stop.</returns>
-        bool CheckScore(Float validationScore, Float trainingScore, out bool isBestCandidate);
+        public abstract bool CheckScore(Float validationScore, Float trainingScore, out bool isBestCandidate);
     }
 
     [TlcModule.ComponentKind("EarlyStoppingCriterion")]
@@ -69,8 +69,6 @@ internal EarlyStoppingCriterion(TOptions options, bool lowerIsBetter)
             _bestScore = LowerIsBetter ? Float.PositiveInfinity : Float.NegativeInfinity;
         }
 
-        public abstract bool CheckScore(Float validationScore, Float trainingScore, out bool isBestCandidate);
-
         /// <summary>
         /// Check if the given score is the best ever. The best score will be stored at this._bestScore.
         /// </summary>

src/Microsoft.ML.HalLearners/SymSgdClassificationTrainer.cs

@@ -15,6 +15,7 @@
 using Microsoft.ML.EntryPoints;
 using Microsoft.ML.Internal.Internallearn;
 using Microsoft.ML.Internal.Utilities;
+using Microsoft.ML.Model;
 using Microsoft.ML.Trainers.HalLearners;
 using Microsoft.ML.Transforms;
 

src/Microsoft.ML.StandardLearners/Standard/LogisticRegression/LogisticRegression.cs

@@ -10,8 +10,8 @@
 using Microsoft.ML.CommandLine;
 using Microsoft.ML.Data;
 using Microsoft.ML.EntryPoints;
-using Microsoft.ML.Internal.Internallearn;
 using Microsoft.ML.Internal.Utilities;
+using Microsoft.ML.Model;
 using Microsoft.ML.Numeric;
 using Microsoft.ML.Trainers;
 

src/Microsoft.ML.StandardLearners/Standard/Online/AveragedPerceptron.cs

@@ -9,7 +9,7 @@
 using Microsoft.ML.CommandLine;
 using Microsoft.ML.Data;
 using Microsoft.ML.EntryPoints;
-using Microsoft.ML.Internal.Internallearn;
+using Microsoft.ML.Model;
 using Microsoft.ML.Numeric;
 using Microsoft.ML.Trainers.Online;
 

src/Microsoft.ML.StandardLearners/Standard/Online/LinearSvm.cs

@@ -11,6 +11,7 @@
 using Microsoft.ML.EntryPoints;
 using Microsoft.ML.Internal.Internallearn;
 using Microsoft.ML.Internal.Utilities;
+using Microsoft.ML.Model;
 using Microsoft.ML.Numeric;
 using Microsoft.ML.Trainers.Online;