| /* |
| * 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.flink.table.plan.nodes.datastream |
| |
| import org.apache.calcite.rex.RexNode |
| import org.apache.flink.api.common.functions.{MapFunction, RichMapFunction} |
| import org.apache.flink.api.common.typeinfo.TypeInformation |
| import org.apache.flink.configuration.Configuration |
| import org.apache.flink.streaming.api.datastream.DataStream |
| import org.apache.flink.streaming.api.functions.ProcessFunction |
| import org.apache.flink.table.api.TableConfig |
| import org.apache.flink.table.codegen.{FunctionCodeGenerator, GeneratedFunction} |
| import org.apache.flink.table.plan.nodes.CommonScan |
| import org.apache.flink.table.plan.schema.RowSchema |
| import org.apache.flink.types.Row |
| import org.apache.flink.table.runtime.CRowOutputProcessRunner |
| import org.apache.flink.table.runtime.types.{CRow, CRowTypeInfo} |
| import org.apache.flink.table.typeutils.TimeIndicatorTypeInfo |
| |
| trait StreamScan extends CommonScan[CRow] with DataStreamRel { |
| |
| protected def convertToInternalRow( |
| schema: RowSchema, |
| input: DataStream[Any], |
| fieldIdxs: Array[Int], |
| config: TableConfig, |
| rowtimeExpression: Option[RexNode]): DataStream[CRow] = { |
| |
| val inputType = input.getType |
| val internalType = schema.typeInfo |
| val cRowType = CRowTypeInfo(internalType) |
| |
| val hasTimeIndicator = fieldIdxs.exists(f => |
| f == TimeIndicatorTypeInfo.ROWTIME_STREAM_MARKER || |
| f == TimeIndicatorTypeInfo.PROCTIME_STREAM_MARKER) |
| |
| if (input.getType == cRowType && !hasTimeIndicator) { |
| // input is already a CRow with correct type |
| input.asInstanceOf[DataStream[CRow]] |
| |
| } else if (input.getType == internalType && !hasTimeIndicator) { |
| // input is already of correct type. Only need to wrap it as CRow |
| input.asInstanceOf[DataStream[Row]].map(new RichMapFunction[Row, CRow] { |
| @transient private var outCRow: CRow = null |
| override def open(parameters: Configuration): Unit = { |
| outCRow = new CRow(null, change = true) |
| } |
| |
| override def map(v: Row): CRow = { |
| outCRow.row = v |
| outCRow |
| } |
| }).returns(cRowType) |
| |
| } else { |
| // input needs to be converted and wrapped as CRow or time indicators need to be generated |
| |
| val function = generateConversionProcessFunction( |
| config, |
| inputType, |
| internalType, |
| "DataStreamSourceConversion", |
| schema.fieldNames, |
| fieldIdxs, |
| rowtimeExpression |
| ) |
| |
| val processFunc = new CRowOutputProcessRunner( |
| function.name, |
| function.code, |
| cRowType) |
| |
| val opName = s"from: (${schema.fieldNames.mkString(", ")})" |
| |
| input.process(processFunc).name(opName).returns(cRowType) |
| } |
| } |
| |
| private def generateConversionProcessFunction( |
| config: TableConfig, |
| inputType: TypeInformation[Any], |
| outputType: TypeInformation[Row], |
| conversionOperatorName: String, |
| fieldNames: Seq[String], |
| inputFieldMapping: Array[Int], |
| rowtimeExpression: Option[RexNode]): GeneratedFunction[ProcessFunction[Any, Row], Row] = { |
| |
| val generator = new FunctionCodeGenerator( |
| config, |
| false, |
| inputType, |
| None, |
| Some(inputFieldMapping)) |
| |
| val conversion = generator.generateConverterResultExpression( |
| outputType, |
| fieldNames, |
| rowtimeExpression) |
| |
| val body = |
| s""" |
| |${conversion.code} |
| |${generator.collectorTerm}.collect(${conversion.resultTerm}); |
| |""".stripMargin |
| |
| generator.generateFunction( |
| "DataStreamSourceConversion", |
| classOf[ProcessFunction[Any, Row]], |
| body, |
| outputType) |
| } |
| } |