runners/twister2/src/main/java/org/apache/beam/runners/twister2/translators/batch/AssignWindowTranslatorBatch.java

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 * to you under the Apache License, Version 2.0 (the
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 *     http://www.apache.org/licenses/LICENSE-2.0
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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.util.WindowedValue;
import org.apache.beam.sdk.values.WindowingStrategy;

/** Assign Window translator. */
@SuppressWarnings({
  "rawtypes" // TODO(https://issues.apache.org/jira/browse/BEAM-10556)
})
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);
  }
}