Github user thunterdb commented on a diff in the pull request:
https://github.com/apache/spark/pull/10472#discussion_r48993376
--- Diff: mllib/src/main/scala/org/apache/spark/ml/util/SchemaUtils.scala
---
@@ -44,6 +44,23 @@ private[spark] object SchemaUtils {
}
/**
+ * Check whether the given schema contains a column of one of the
require data types.
+ * @param colName column name
+ * @param dataTypes required column data types
+ */
+ def checkColumnTypes(
+ schema: StructType,
+ colName: String,
+ dataTypes: Seq[DataType],
+ msg: String = ""): Unit = {
+ val actualDataType = schema(colName).dataType
+ val message = if (msg != null && msg.trim.length > 0) " " + msg else ""
+ require(dataTypes.exists(actualDataType.equals(_)),
--- End diff --
You do not need the `_`: `dataTypes.exists(actualDataType.equals)`
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