spark ParseMode 源码
spark ParseMode 代码
文件路径：/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/ParseMode.scala
/*
* 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.catalyst.util
import java.util.Locale
import org.apache.spark.internal.Logging
sealed trait ParseMode {
/**
* String name of the parse mode.
*/
def name: String
}
/**
* This mode permissively parses the records.
*/
case object PermissiveMode extends ParseMode { val name = "PERMISSIVE" }
/**
* This mode ignores the whole corrupted records.
*/
case object DropMalformedMode extends ParseMode { val name = "DROPMALFORMED" }
/**
* This mode throws an exception when it meets corrupted records.
*/
case object FailFastMode extends ParseMode { val name = "FAILFAST" }
object ParseMode extends Logging {
/**
* Returns the parse mode from the given string.
*/
def fromString(mode: String): ParseMode = mode.toUpperCase(Locale.ROOT) match {
case PermissiveMode.name => PermissiveMode
case DropMalformedMode.name => DropMalformedMode
case FailFastMode.name => FailFastMode
case _ =>
logWarning(s"$mode is not a valid parse mode. Using ${PermissiveMode.name}.")
PermissiveMode
}
}
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