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WindowNodeBuilder.scala
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WindowNodeBuilder.scala
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/*
* Copyright 2019 ABSA Group Limited
*
* 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 za.co.absa.spline.harvester.builder.plan
import org.apache.spark.sql.catalyst.expressions.{Attribute, Expression, NamedExpression}
import org.apache.spark.sql.catalyst.plans.logical.Window
import za.co.absa.spline.commons.reflect.extractors.AccessorMethodValueExtractor
import za.co.absa.spline.harvester.IdGeneratorsBundle
import za.co.absa.spline.harvester.converter.{DataConverter, DataTypeConverter}
import za.co.absa.spline.harvester.postprocessing.PostProcessor
class WindowNodeBuilder
(operation: Window)
(idGenerators: IdGeneratorsBundle, dataTypeConverter: DataTypeConverter, dataConverter: DataConverter, postProcessor: PostProcessor)
extends GenericPlanNodeBuilder(operation)(idGenerators, dataTypeConverter, dataConverter, postProcessor) {
override def resolveAttributeChild(attribute: Attribute): Option[Expression] = {
WindowNodeBuilder.extractExpressions(operation)
.getOrElse(Nil)
.find(PartialFunction.cond(_) {
case ne: NamedExpression => ne.exprId == attribute.exprId
})
}
}
object WindowNodeBuilder {
// This function solves Spark and Databricks differences (See issue #262)
private val extractExpressions: Window => Option[Seq[Expression]] =
AccessorMethodValueExtractor.firstOf[Seq[Expression]]("windowExpressions", "projectList")
}