diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala index 11fce4beaf55f..9778df271ddd5 100644 --- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala +++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala @@ -328,7 +328,8 @@ object StructType extends AbstractDataType { def apply(fields: Seq[StructField]): StructType = StructType(fields.toArray) def apply(fields: java.util.List[StructField]): StructType = { - StructType(fields.toArray.asInstanceOf[Array[StructField]]) + import scala.collection.JavaConverters._ + StructType(fields.asScala) } protected[sql] def fromAttributes(attributes: Seq[Attribute]): StructType = diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java index d191b50fa802e..567bdddece80e 100644 --- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java +++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java @@ -22,6 +22,7 @@ import java.util.Comparator; import java.util.List; import java.util.Map; +import java.util.ArrayList; import scala.collection.JavaConverters; import scala.collection.Seq; @@ -209,6 +210,18 @@ public void testCreateDataFromFromList() { Assert.assertEquals(1, result.length); } + @Test + public void testCreateStructTypeFromList(){ + List fields1 = new ArrayList<>(); + fields1.add(new StructField("id", DataTypes.StringType, true, Metadata.empty())); + StructType schema1 = StructType$.MODULE$.apply(fields1); + Assert.assertEquals(0, schema1.fieldIndex("id")); + + List fields2 = Arrays.asList(new StructField("id", DataTypes.StringType, true, Metadata.empty())); + StructType schema2 = StructType$.MODULE$.apply(fields2); + Assert.assertEquals(0, schema2.fieldIndex("id")); + } + private static final Comparator crosstabRowComparator = new Comparator() { @Override public int compare(Row row1, Row row2) {