content: /*
   * 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.beam.runners.spark.structuredstreaming.translation.batch;
  
  import java.util.HashMap;
  import java.util.Map;
  import org.apache.beam.runners.spark.structuredstreaming.translation.PipelineTranslator;
  import org.apache.beam.runners.spark.structuredstreaming.translation.TransformTranslator;
  import org.apache.beam.sdk.Pipeline;
  import org.apache.beam.sdk.annotations.Internal;
  import org.apache.beam.sdk.transforms.Combine;
  import org.apache.beam.sdk.transforms.Flatten;
  import org.apache.beam.sdk.transforms.GroupByKey;
  import org.apache.beam.sdk.transforms.Impulse;
  import org.apache.beam.sdk.transforms.PTransform;
  import org.apache.beam.sdk.transforms.ParDo;
  import org.apache.beam.sdk.transforms.Reshuffle;
  import org.apache.beam.sdk.transforms.windowing.Window;
  import org.apache.beam.sdk.util.construction.SplittableParDo;
  import org.apache.beam.sdk.values.PInput;
  import org.apache.beam.sdk.values.POutput;
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  /**
   * {@link PipelineTranslator} for executing a {@link Pipeline} in Spark in batch mode. This contains
   * only the components specific to batch: registry of batch {@link TransformTranslator} and registry
   * lookup code.
   */
  @Internal
  public class PipelineTranslatorBatch extends PipelineTranslator {
  
    // --------------------------------------------------------------------------------------------
    //  Transform Translator Registry
    // --------------------------------------------------------------------------------------------
  
    @SuppressWarnings("rawtypes")
    private static final Map<Class<? extends PTransform>, TransformTranslator> TRANSFORM_TRANSLATORS =
        new HashMap<>();
  
    // TODO the ability to have more than one TransformTranslator per URN
    // that could be dynamically chosen by a predicated that evaluates based on PCollection
    // obtainable though node.getInputs.getValue()
    // See
    // https://github.com/seznam/euphoria/blob/master/euphoria-spark/src/main/java/cz/seznam/euphoria/spark/SparkFlowTranslator.java#L83
    // And
    // https://github.com/seznam/euphoria/blob/master/euphoria-spark/src/main/java/cz/seznam/euphoria/spark/SparkFlowTranslator.java#L106
  
    static {
      TRANSFORM_TRANSLATORS.put(Impulse.class, new ImpulseTranslatorBatch());
      TRANSFORM_TRANSLATORS.put(Combine.PerKey.class, new CombinePerKeyTranslatorBatch<>());
      TRANSFORM_TRANSLATORS.put(Combine.Globally.class, new CombineGloballyTranslatorBatch<>());
      TRANSFORM_TRANSLATORS.put(
          Combine.GroupedValues.class, new CombineGroupedValuesTranslatorBatch<>());
      TRANSFORM_TRANSLATORS.put(GroupByKey.class, new GroupByKeyTranslatorBatch<>());
  
      TRANSFORM_TRANSLATORS.put(Reshuffle.class, new ReshuffleTranslatorBatch<>());
      TRANSFORM_TRANSLATORS.put(
          Reshuffle.ViaRandomKey.class, new ReshuffleTranslatorBatch.ViaRandomKey<>());
  
      TRANSFORM_TRANSLATORS.put(Flatten.PCollections.class, new FlattenTranslatorBatch<>());
  
      TRANSFORM_TRANSLATORS.put(Window.Assign.class, new WindowAssignTranslatorBatch<>());
  
      TRANSFORM_TRANSLATORS.put(ParDo.MultiOutput.class, new ParDoTranslatorBatch<>());
  
      TRANSFORM_TRANSLATORS.put(
          SplittableParDo.PrimitiveBoundedRead.class, new ReadSourceTranslatorBatch<>());
    }
  
    /** Returns a {@link TransformTranslator} for the given {@link PTransform} if known. */
    @Override
    @Nullable
    protected <InT extends PInput, OutT extends POutput, TransformT extends PTransform<InT, OutT>>
        TransformTranslator<InT, OutT, TransformT> getTransformTranslator(TransformT transform) {
      return TRANSFORM_TRANSLATORS.get(transform.getClass());
    }
  }
  