Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/16296#discussion_r94699572
--- Diff:
sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/HiveOptions.scala
---
@@ -0,0 +1,90 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.hive.execution
+
+import org.apache.spark.sql.catalyst.util.CaseInsensitiveMap
+
+/**
+ * Options for the Hive data source.
+ */
+class HiveOptions(@transient private val parameters: CaseInsensitiveMap)
extends Serializable {
+ import HiveOptions._
+
+ def this(parameters: Map[String, String]) = this(new
CaseInsensitiveMap(parameters))
+
+ val format = parameters.get(FORMAT).map(_.toLowerCase)
+ val inputFormat = parameters.get(INPUT_FORMAT)
+ val outputFormat = parameters.get(OUTPUT_FORMAT)
+
+ if (inputFormat.isDefined != outputFormat.isDefined) {
+ throw new IllegalArgumentException("Cannot specify only inputFormat or
outputFormat, you " +
+ "have to specify both of them.")
+ }
+
+ if (format.isDefined && inputFormat.isDefined) {
+ throw new IllegalArgumentException("Cannot specify format and
inputFormat/outputFormat " +
+ "together for Hive data source.")
+ }
+
+ val serde = parameters.get(SERDE)
+
+ for (f <- format if serde.isDefined) {
--- End diff --
maybe using if is easier to read?
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