overloaded load method in Readable transformers to be Java compatible

mllib/src/main/scala/org/apache/spark/ml/feature/Binarizer.scala

@@ -96,4 +96,7 @@ object Binarizer extends Readable[Binarizer] {
 
   @Since("1.6.0")
   override def read: Reader[Binarizer] = new DefaultParamsReader[Binarizer]
+
+  @Since("1.6.0")
+  override def load(path: String): Binarizer = read.load(path)
 }

mllib/src/main/scala/org/apache/spark/ml/feature/Bucketizer.scala

@@ -20,7 +20,7 @@ package org.apache.spark.ml.feature
 import java.{util => ju}
 
 import org.apache.spark.SparkException
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Since, Experimental}
 import org.apache.spark.ml.Model
 import org.apache.spark.ml.attribute.NominalAttribute
 import org.apache.spark.ml.param._
@@ -94,6 +94,7 @@ final class Bucketizer(override val uid: String)
     defaultCopy[Bucketizer](extra).setParent(parent)
   }
 
+  @Since("1.6.0")
   override def write: Writer = new DefaultParamsWriter(this)
 }
 
@@ -138,5 +139,9 @@ object Bucketizer extends Readable[Bucketizer] {
     }
   }
 
+  @Since("1.6.0")
   override def read: Reader[Bucketizer] = new DefaultParamsReader[Bucketizer]
+
+  @Since("1.6.0")
+  override def load(path: String): Bucketizer = read.load(path)
 }

mllib/src/main/scala/org/apache/spark/ml/feature/DCT.scala

@@ -79,4 +79,7 @@ object DCT extends Readable[DCT] {
 
   @Since("1.6.0")
   override def read: Reader[DCT] = new DefaultParamsReader[DCT]
+
+  @Since("1.6.0")
+  override def load(path: String): DCT = read.load(path)
 }

mllib/src/main/scala/org/apache/spark/ml/feature/HashingTF.scala

@@ -84,6 +84,10 @@ class HashingTF(override val uid: String)
 
 @Since("1.6.0")
 object HashingTF extends Readable[HashingTF] {
+
   @Since("1.6.0")
   override def read: Reader[HashingTF] = new DefaultParamsReader[HashingTF]
+
+  @Since("1.6.0")
+  override def load(path: String): HashingTF = read.load(path)
 }

mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala

@@ -231,8 +231,12 @@ class Interaction @Since("1.6.0") (override val uid: String) extends Transformer
 
 @Since("1.6.0")
 object Interaction extends Readable[Interaction] {
+
   @Since("1.6.0")
   override def read: Reader[Interaction] = new DefaultParamsReader[Interaction]
+
+  @Since("1.6.0")
+  override def load(path: String): Interaction = read.load(path)
 }
 
 /**

mllib/src/main/scala/org/apache/spark/ml/feature/NGram.scala

@@ -73,6 +73,10 @@ class NGram(override val uid: String)
 
 @Since("1.6.0")
 object NGram extends Readable[NGram] {
+
   @Since("1.6.0")
   override def read: Reader[NGram] = new DefaultParamsReader[NGram]
+
+  @Since("1.6.0")
+  override def load(path: String): NGram = read.load(path)
 }

mllib/src/main/scala/org/apache/spark/ml/feature/Normalizer.scala

@@ -63,6 +63,10 @@ class Normalizer(override val uid: String)
 
 @Since("1.6.0")
 object Normalizer extends Readable[Normalizer] {
+
   @Since("1.6.0")
   override def read: Reader[Normalizer] = new DefaultParamsReader[Normalizer]
+
+  @Since("1.6.0")
+  override def load(path: String): Normalizer = read.load(path)
 }

mllib/src/main/scala/org/apache/spark/ml/feature/OneHotEncoder.scala

@@ -172,6 +172,10 @@ class OneHotEncoder(override val uid: String) extends Transformer
 
 @Since("1.6.0")
 object OneHotEncoder extends Readable[OneHotEncoder] {
+
   @Since("1.6.0")
   override def read: Reader[OneHotEncoder] = new DefaultParamsReader[OneHotEncoder]
+
+  @Since("1.6.0")
+  override def load(path: String): OneHotEncoder = read.load(path)
 }

mllib/src/main/scala/org/apache/spark/ml/feature/PolynomialExpansion.scala

@@ -183,4 +183,7 @@ object PolynomialExpansion extends Readable[PolynomialExpansion] {
 
   @Since("1.6.0")
   override def read: Reader[PolynomialExpansion] = new DefaultParamsReader[PolynomialExpansion]
+
+  @Since("1.6.0")
+  override def load(path: String): PolynomialExpansion = read.load(path)
 }

mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala

@@ -180,4 +180,7 @@ object QuantileDiscretizer extends Readable[QuantileDiscretizer] with Logging {
 
   @Since("1.6.0")
   override def read: Reader[QuantileDiscretizer] = new DefaultParamsReader[QuantileDiscretizer]
+
+  @Since("1.6.0")
+  override def load(path: String): QuantileDiscretizer = read.load(path)
 }

mllib/src/main/scala/org/apache/spark/ml/feature/SQLTransformer.scala

@@ -84,6 +84,10 @@ class SQLTransformer @Since("1.6.0") (override val uid: String) extends Transfor
 
 @Since("1.6.0")
 object SQLTransformer extends Readable[SQLTransformer] {
+
   @Since("1.6.0")
   override def read: Reader[SQLTransformer] = new DefaultParamsReader[SQLTransformer]
+
+  @Since("1.6.0")
+  override def load(path: String): SQLTransformer = read.load(path)
 }

mllib/src/main/scala/org/apache/spark/ml/feature/StopWordsRemover.scala

@@ -161,6 +161,10 @@ class StopWordsRemover(override val uid: String)
 
 @Since("1.6.0")
 object StopWordsRemover extends Readable[StopWordsRemover] {
+
   @Since("1.6.0")
   override def read: Reader[StopWordsRemover] = new DefaultParamsReader[StopWordsRemover]
+
+  @Since("1.6.0")
+  override def load(path: String): StopWordsRemover = read.load(path)
 }

mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala

@@ -263,6 +263,10 @@ class IndexToString private[ml] (override val uid: String)
 
 @Since("1.6.0")
 object IndexToString extends Readable[IndexToString] {
+
   @Since("1.6.0")
   override def read: Reader[IndexToString] = new DefaultParamsReader[IndexToString]
+
+  @Since("1.6.0")
+  override def load(path: String): IndexToString = read.load(path)
 }

mllib/src/main/scala/org/apache/spark/ml/feature/Tokenizer.scala

@@ -53,8 +53,12 @@ class Tokenizer(override val uid: String)
 
 @Since("1.6.0")
 object Tokenizer extends Readable[Tokenizer] {
+
   @Since("1.6.0")
   override def read: Reader[Tokenizer] = new DefaultParamsReader[Tokenizer]
+
+  @Since("1.6.0")
+  override def load(path: String): Tokenizer = read.load(path)
 }
 
 /**
@@ -142,9 +146,16 @@ class RegexTokenizer(override val uid: String)
 
   override def copy(extra: ParamMap): RegexTokenizer = defaultCopy(extra)
 
+  @Since("1.6.0")
   override def write: Writer = new DefaultParamsWriter(this)
 }
 
+@Since("1.6.0")
 object RegexTokenizer extends Readable[RegexTokenizer] {
+
+  @Since("1.6.0")
   override def read: Reader[RegexTokenizer] = new DefaultParamsReader[RegexTokenizer]
+
+  @Since("1.6.0")
+  override def load(path: String): RegexTokenizer = read.load(path)
 }

mllib/src/main/scala/org/apache/spark/ml/feature/VectorAssembler.scala

@@ -131,6 +131,9 @@ object VectorAssembler extends Readable[VectorAssembler] {
   @Since("1.6.0")
   override def read: Reader[VectorAssembler] = new DefaultParamsReader[VectorAssembler]
 
+  @Since("1.6.0")
+  override def load(path: String): VectorAssembler = read.load(path)
+
   private[feature] def assemble(vv: Any*): Vector = {
     val indices = ArrayBuilder.make[Int]
     val values = ArrayBuilder.make[Double]

mllib/src/main/scala/org/apache/spark/ml/feature/VectorSlicer.scala

@@ -175,4 +175,7 @@ object VectorSlicer extends Readable[VectorSlicer] {
 
   @Since("1.6.0")
   override def read: Reader[VectorSlicer] = new DefaultParamsReader[VectorSlicer]
+
+  @Since("1.6.0")
+  override def load(path: String): VectorSlicer = read.load(path)
 }