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CompositePostProcessingFilter.scala
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CompositePostProcessingFilter.scala
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/*
* Copyright 2021 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.postprocessing
import org.apache.spark.internal.Logging
import za.co.absa.spline.HierarchicalObjectFactory
import za.co.absa.spline.harvester.HarvestingContext
import za.co.absa.spline.harvester.postprocessing.CompositePostProcessingFilter.FiltersKey
import za.co.absa.spline.producer.model._
class CompositePostProcessingFilter(val delegatees: Seq[PostProcessingFilter])
extends PostProcessingFilter
with Logging {
def this(objectFactory: HierarchicalObjectFactory) = this(
objectFactory.createComponentsByKey(FiltersKey)
)
override def name: String = delegatees.map(_.name) mkString ", "
override def processExecutionEvent(event: ExecutionEvent, ctx: HarvestingContext): ExecutionEvent = chainCall(event) {
_.processExecutionEvent(_, ctx)
}
override def processExecutionPlan(plan: ExecutionPlan, ctx: HarvestingContext): ExecutionPlan = chainCall(plan) {
_.processExecutionPlan(_, ctx)
}
override def processReadOperation(op: ReadOperation, ctx: HarvestingContext): ReadOperation = chainCall(op) {
_.processReadOperation(_, ctx)
}
override def processWriteOperation(op: WriteOperation, ctx: HarvestingContext): WriteOperation = chainCall(op) {
_.processWriteOperation(_, ctx)
}
override def processDataOperation(op: DataOperation, ctx: HarvestingContext): DataOperation = chainCall(op) {
_.processDataOperation(_, ctx)
}
private def chainCall[A](arg: A)(call: (PostProcessingFilter, A) => A): A = {
delegatees.foldLeft(arg) {
case (z, d) => call(d, z)
}
}
}
object CompositePostProcessingFilter {
private val FiltersKey = "filters"
}