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.dataflow.worker;
  
  import static org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.base.Preconditions.checkState;
  
  import com.google.api.services.dataflow.model.SideInputInfo;
  import java.util.List;
  import java.util.Map;
  import org.apache.beam.runners.dataflow.util.CloudObject;
  import org.apache.beam.runners.dataflow.worker.util.common.worker.ParDoFn;
  import org.apache.beam.runners.dataflow.worker.util.common.worker.Receiver;
  import org.apache.beam.sdk.options.PipelineOptions;
  import org.apache.beam.sdk.values.KV;
  import org.apache.beam.sdk.values.TupleTag;
  import org.apache.beam.sdk.values.WindowedValue;
  import org.apache.beam.sdk.values.WindowedValues;
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  /** A {@link ParDoFnFactory} to create instances of {@link ReifyTimestampAndWindowsParDoFn}. */
  @SuppressWarnings({
    "nullness" // TODO(https://github.com/apache/beam/issues/20497)
  })
  class ReifyTimestampAndWindowsParDoFnFactory implements ParDoFnFactory {
    @Override
    public ParDoFn create(
        PipelineOptions options,
        CloudObject cloudUserFn,
        @Nullable List<SideInputInfo> sideInputInfos,
        TupleTag<?> mainOutputTag,
        Map<TupleTag<?>, Integer> outputTupleTagsToReceiverIndices,
        DataflowExecutionContext<?> executionContext,
        DataflowOperationContext operationContext)
        throws Exception {
  
      return new ReifyTimestampAndWindowsParDoFn();
    }
  
    private static class ReifyTimestampAndWindowsParDoFn implements ParDoFn {
  
      private Receiver receiver;
  
      @Override
      public void startBundle(Receiver... receivers) throws Exception {
        checkState(
            receivers.length == 1,
            "%s.startBundle() called with %s receivers, expected exactly 1. "
                + "This is a bug in the Dataflow service",
            getClass().getSimpleName(),
            receivers.length);
        this.receiver = receivers[0];
      }
  
      @Override
      public void processElement(Object untypedElem) throws Exception {
        WindowedValue<KV<?, ?>> typedElem = (WindowedValue<KV<?, ?>>) untypedElem;
  
        WindowedValues.builder(typedElem)
            .withValue(
                KV.of(
                    typedElem.getValue().getKey(),
                    WindowedValues.of(
                        typedElem.getValue().getValue(),
                        typedElem.getTimestamp(),
                        typedElem.getWindows(),
                        typedElem.getPaneInfo())))
            .setReceiver(receiver::process)
            .output();
      }
  
      @Override
      public void processTimers() {}
  
      @Override
      public void finishBundle() throws Exception {}
  
      @Override
      public void abort() throws Exception {}
    }
  }
  