Github user hhbyyh commented on a diff in the pull request:
https://github.com/apache/spark/pull/17862#discussion_r146168734
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/classification/LinearSVC.scala ---
@@ -282,8 +348,27 @@ class LinearSVC @Since("2.2.0") (
@Since("2.2.0")
object LinearSVC extends DefaultParamsReadable[LinearSVC] {
+ /** String name for Limited-memory BFGS. */
+ private[classification] val LBFGS: String =
"l-bfgs".toLowerCase(Locale.ROOT)
+
+ /** String name for Orthant-Wise Limited-memory Quasi-Newton. */
+ private[classification] val OWLQN: String =
"owlqn".toLowerCase(Locale.ROOT)
+
+ /* Set of optimizers that LinearSVC supports */
+ private[classification] val supportedSolvers = Array(LBFGS, OWLQN)
+
+ /** String name for Hinge Loss. */
+ private[classification] val HINGE: String =
"hinge".toLowerCase(Locale.ROOT)
+
+ /** String name for Squared Hinge Loss. */
+ private[classification] val SQUARED_HINGE: String =
"squared_hinge".toLowerCase(Locale.ROOT)
--- End diff --
Personally I never, but I cannot grantee it for all the Locales.
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