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.translation;
  
  import org.apache.beam.sdk.values.KV;
  import org.apache.beam.sdk.values.PCollection;
  import org.apache.beam.sdk.values.WindowedValue;
  import org.apache.beam.sdk.values.WindowedValues;
  import org.apache.spark.api.java.function.Function;
  
  /**
   * Simple {@link Function} to bring the windowing information into the value from the implicit
   * background representation of the {@link PCollection}.
   */
  public class ReifyTimestampsAndWindowsFunction<K, V>
      implements Function<WindowedValue<KV<K, V>>, KV<K, WindowedValue<V>>> {
    @Override
    public KV<K, WindowedValue<V>> call(WindowedValue<KV<K, V>> elem) throws Exception {
      return KV.of(
          elem.getValue().getKey(),
          WindowedValues.of(
              elem.getValue().getValue(),
              elem.getTimestamp(),
              elem.getWindows(),
              elem.getPaneInfo()));
    }
  }
  