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   * Licensed to the Apache Software Foundation (ASF) under one
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   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
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   *
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  package org.apache.beam.runners.twister2.translators.batch;
  
  import edu.iu.dsc.tws.tset.sets.batch.BatchTSetImpl;
  import edu.iu.dsc.tws.tset.sets.batch.ComputeTSet;
  import java.util.Iterator;
  import org.apache.beam.runners.twister2.Twister2BatchTranslationContext;
  import org.apache.beam.runners.twister2.translators.BatchTransformTranslator;
  import org.apache.beam.runners.twister2.translators.functions.AssignWindowsFunction;
  import org.apache.beam.sdk.transforms.windowing.BoundedWindow;
  import org.apache.beam.sdk.transforms.windowing.Window;
  import org.apache.beam.sdk.transforms.windowing.WindowFn;
  import org.apache.beam.sdk.values.WindowedValue;
  import org.apache.beam.sdk.values.WindowingStrategy;
  
  /** Assign Window translator. */
  @SuppressWarnings({
    "rawtypes" // TODO(https://github.com/apache/beam/issues/20447)
  })
  public class AssignWindowTranslatorBatch<T> implements BatchTransformTranslator<Window.Assign<T>> {
    @Override
    public void translateNode(Window.Assign<T> transform, Twister2BatchTranslationContext context) {
      BatchTSetImpl<WindowedValue<T>> inputTTSet =
          context.getInputDataSet(context.getInput(transform));
  
      final WindowingStrategy<T, BoundedWindow> windowingStrategy =
          (WindowingStrategy<T, BoundedWindow>) context.getOutput(transform).getWindowingStrategy();
  
      WindowFn<T, BoundedWindow> windowFn = windowingStrategy.getWindowFn();
      ComputeTSet<WindowedValue<T>, Iterator<WindowedValue<T>>> outputTSet =
          inputTTSet.direct().compute(new AssignWindowsFunction(windowFn, context.getOptions()));
      context.setOutputDataSet(context.getOutput(transform), outputTSet);
    }
  }
  