/* * Copyright 2018 MinIO, Inc. * * Licensed 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 io.minio.spark.select // Java standard libraries import java.io.File // Spark internal libraries import org.apache.spark.sql.SQLContext import org.apache.spark.sql.sources.{BaseRelation, RelationProvider, SchemaRelationProvider} import org.apache.spark.sql.types.StructType import org.apache.spark.sql.sources.DataSourceRegister class SelectJSONSource extends SchemaRelationProvider with DataSourceRegister { private def checkPath(parameters: Map[String, String]): String = { parameters.getOrElse("path", sys.error("'path' must be specified for JSON data.")) } /** * Short alias for spark-select data source. */ override def shortName(): String = "minioSelectJSON" override def createRelation(sqlContext: SQLContext, params: Map[String, String], schema: StructType): SelectJSONRelation = { val path = checkPath(params) SelectJSONRelation(Some(path), params, schema)(sqlContext) } }