spark AvroTable 源码
spark AvroTable 代码
文件路径：/connector/avro/src/main/scala/org/apache/spark/sql/v2/avro/AvroTable.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.v2.avro
import scala.collection.JavaConverters._
import org.apache.hadoop.fs.FileStatus
import org.apache.spark.sql.SparkSession
import org.apache.spark.sql.avro.AvroUtils
import org.apache.spark.sql.connector.write.{LogicalWriteInfo, Write, WriteBuilder}
import org.apache.spark.sql.execution.datasources.FileFormat
import org.apache.spark.sql.execution.datasources.v2.FileTable
import org.apache.spark.sql.types.{DataType, StructType}
import org.apache.spark.sql.util.CaseInsensitiveStringMap
case class AvroTable(
name: String,
sparkSession: SparkSession,
options: CaseInsensitiveStringMap,
paths: Seq[String],
userSpecifiedSchema: Option[StructType],
fallbackFileFormat: Class[_ <: FileFormat])
extends FileTable(sparkSession, options, paths, userSpecifiedSchema) {
override def newScanBuilder(options: CaseInsensitiveStringMap): AvroScanBuilder =
new AvroScanBuilder(sparkSession, fileIndex, schema, dataSchema, options)
override def inferSchema(files: Seq[FileStatus]): Option[StructType] =
AvroUtils.inferSchema(sparkSession, options.asScala.toMap, files)
override def newWriteBuilder(info: LogicalWriteInfo): WriteBuilder =
new WriteBuilder {
override def build(): Write = AvroWrite(paths, formatName, supportsDataType, info)
}
override def supportsDataType(dataType: DataType): Boolean = AvroUtils.supportsDataType(dataType)
override def formatName: String = "AVRO"
}
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