Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/12088#discussion_r58082831
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/source/libsvm/LibSVMRelation.scala ---
@@ -127,6 +135,25 @@ class DefaultSource extends FileFormat with
DataSourceRegister {
StructField("features", new VectorUDT(), nullable = false) :: Nil))
}
+ override def prepareRead(
+ sqlContext: SQLContext,
+ options: Map[String, String],
+ files: Seq[FileStatus]): Map[String, String] = {
+ def computeNumFeatures(): Int = {
+ val dataFiles = files.filterNot(_.getPath.getName startsWith "_")
+ val path = if (dataFiles.length == 1)
dataFiles.head.getPath.toUri.toString
+ else if (dataFiles.isEmpty) throw new IOException("No input path
specified for libsvm data")
+ else throw new IOException("Multiple input paths are not supported
for libsvm data.")
--- End diff --
indent
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