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/*
* 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.execution.datasources.parquet
import org.apache.parquet.hadoop.metadata.CompressionCodecName
import org.apache.spark.internal.Logging
import org.apache.spark.sql.internal.SQLConf
/**
* Options for the Parquet data source.
*/
class ParquetOptions(
@transient private val parameters: Map[String, String],
@transient private val sqlConf: SQLConf)
extends Logging with Serializable {
import ParquetOptions._
/**
* Compression codec to use. By default use the value specified in SQLConf.
* Acceptable values are defined in [[shortParquetCompressionCodecNames]].
*/
val compressionCodec: String = {
val codecName = parameters.getOrElse("compression", sqlConf.parquetCompressionCodec).toLowerCase
if (!shortParquetCompressionCodecNames.contains(codecName)) {
val availableCodecs = shortParquetCompressionCodecNames.keys.map(_.toLowerCase)
throw new IllegalArgumentException(s"Codec [$codecName] " +
s"is not available. Available codecs are ${availableCodecs.mkString(", ")}.")
}
shortParquetCompressionCodecNames(codecName).name()
}
}
object ParquetOptions {
// The parquet compression short names
private val shortParquetCompressionCodecNames = Map(
"none" -> CompressionCodecName.UNCOMPRESSED,
"uncompressed" -> CompressionCodecName.UNCOMPRESSED,
"snappy" -> CompressionCodecName.SNAPPY,
"gzip" -> CompressionCodecName.GZIP,
"lzo" -> CompressionCodecName.LZO)
}
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