| /* |
| * 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.v2 |
| |
| import org.apache.spark.sql.catalyst.InternalRow |
| import org.apache.spark.sql.catalyst.expressions.JoinedRow |
| import org.apache.spark.sql.catalyst.expressions.codegen.GenerateUnsafeProjection |
| import org.apache.spark.sql.connector.read.PartitionReader |
| import org.apache.spark.sql.types.StructType |
| |
| /** |
| * A wrapper reader that always appends partition values to [[InternalRow]]s produced by the input |
| * reader [[fileReader]]. |
| */ |
| class PartitionReaderWithPartitionValues( |
| fileReader: PartitionReader[InternalRow], |
| readDataSchema: StructType, |
| partitionSchema: StructType, |
| partitionValues: InternalRow) extends PartitionReader[InternalRow] { |
| private val fullSchema = readDataSchema.toAttributes ++ partitionSchema.toAttributes |
| private val unsafeProjection = GenerateUnsafeProjection.generate(fullSchema, fullSchema) |
| // Note that we have to apply the converter even though `file.partitionValues` is empty. |
| // This is because the converter is also responsible for converting safe `InternalRow`s into |
| // `UnsafeRow`s |
| private val rowConverter = { |
| if (partitionSchema.isEmpty) { |
| () => unsafeProjection(fileReader.get())} |
| else { |
| val joinedRow = new JoinedRow() |
| () => unsafeProjection(joinedRow(fileReader.get(), partitionValues)) |
| } |
| } |
| |
| override def next(): Boolean = fileReader.next() |
| |
| override def get(): InternalRow = rowConverter() |
| |
| override def close(): Unit = fileReader.close() |
| } |