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[SPARK-53241][CORE] Support createArray in SparkCollectionUtils #51968

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[SPARK-53241][CORE] Support createArray in SparkCollectionUtils #51968

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27 changes: 27 additions & 0 deletions common/utils/src/main/scala/org/apache/spark/util/SparkCollectionUtils.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,10 @@
*/
package org.apache.spark.util

import java.util.Arrays

import scala.collection.immutable
import scala.reflect.ClassTag

private[spark] trait SparkCollectionUtils {
/**
Expand All @@ -38,6 +41,30 @@ private[spark] trait SparkCollectionUtils {
}

def isNotEmpty[K, V](map: java.util.Map[K, V]): Boolean = !isEmpty(map)

def createArray[K: ClassTag](size: Int, defaultValue: K): Array[K] = {
val arr = Array.ofDim[K](size)
val classTag = implicitly[ClassTag[K]]
classTag.runtimeClass match {
case c if c == classOf[Boolean] =>
Arrays.fill(arr.asInstanceOf[Array[Boolean]], defaultValue.asInstanceOf[Boolean])
case c if c == classOf[Byte] =>
Arrays.fill(arr.asInstanceOf[Array[Byte]], defaultValue.asInstanceOf[Byte])
case c if c == classOf[Short] =>
Arrays.fill(arr.asInstanceOf[Array[Short]], defaultValue.asInstanceOf[Short])
case c if c == classOf[Int] =>
Arrays.fill(arr.asInstanceOf[Array[Int]], defaultValue.asInstanceOf[Int])
case c if c == classOf[Long] =>
Arrays.fill(arr.asInstanceOf[Array[Long]], defaultValue.asInstanceOf[Long])
case c if c == classOf[Float] =>
Arrays.fill(arr.asInstanceOf[Array[Float]], defaultValue.asInstanceOf[Float])
case c if c == classOf[Double] =>
Arrays.fill(arr.asInstanceOf[Array[Double]], defaultValue.asInstanceOf[Double])
case _ =>
Arrays.fill(arr.asInstanceOf[Array[AnyRef]], defaultValue.asInstanceOf[AnyRef])
}
arr
}
}

private[spark] object SparkCollectionUtils extends SparkCollectionUtils