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.sdk.transforms;
  
  import org.apache.beam.sdk.values.KV;
  import org.apache.beam.sdk.values.PCollection;
  import org.apache.beam.sdk.values.TimestampedValue;
  
  /**
   * {@link PTransform PTransforms} for reifying the timestamp of values and reemitting the original
   * value with the original timestamp.
   *
   * @deprecated Use {@link Reify}
   */
  @Deprecated
  class ReifyTimestamps {
    private ReifyTimestamps() {}
  
    /**
     * Create a {@link PTransform} that will output all input {@link KV KVs} with the timestamp inside
     * the value.
     *
     * @deprecated Use {@link Reify#timestampsInValue()}
     */
    @Deprecated
    public static <K, V>
        PTransform<PCollection<? extends KV<K, V>>, PCollection<KV<K, TimestampedValue<V>>>>
            inValues() {
      return new InValues<>();
    }
  
    /**
     * Create a {@link PTransform} that consumes {@link KV KVs} with a {@link TimestampedValue} as the
     * value, and outputs the {@link KV} of the input key and value at the timestamp specified by the
     * {@link TimestampedValue}.
     *
     * @deprecated Use {@link Reify#extractTimestampsFromValues()}.
     */
    @Deprecated
    public static <K, V>
        PTransform<PCollection<? extends KV<K, TimestampedValue<V>>>, PCollection<KV<K, V>>>
            extractFromValues() {
      return new ExtractTimestampsFromValues<>();
    }
  
    private static class RemoveWildcard<T>
        extends PTransform<PCollection<? extends T>, PCollection<T>> {
      @Override
      public PCollection<T> expand(PCollection<? extends T> input) {
        return input.apply(
            ParDo.of(
                new DoFn<T, T>() {
                  @ProcessElement
                  public void process(@Element T element, OutputReceiver<T> r) {
                    r.output(element);
                  }
                }));
      }
    }
  
    private static class InValues<K, V>
        extends PTransform<PCollection<? extends KV<K, V>>, PCollection<KV<K, TimestampedValue<V>>>> {
      @Override
      public PCollection<KV<K, TimestampedValue<V>>> expand(PCollection<? extends KV<K, V>> input) {
        return input.apply(new RemoveWildcard<KV<K, V>>()).apply(Reify.timestampsInValue());
      }
    }
  
    private static class ExtractTimestampsFromValues<K, V>
        extends PTransform<PCollection<? extends KV<K, TimestampedValue<V>>>, PCollection<KV<K, V>>> {
      @Override
      public PCollection<KV<K, V>> expand(PCollection<? extends KV<K, TimestampedValue<V>>> input) {
        return input
            .apply(new RemoveWildcard<KV<K, TimestampedValue<V>>>())
            .apply(Reify.extractTimestampsFromValues());
      }
    }
  }
  