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   * 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
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  package org.apache.beam.sdk.transforms.errorhandling;
  
  import org.apache.beam.sdk.transforms.Combine;
  import org.apache.beam.sdk.transforms.Count;
  import org.apache.beam.sdk.transforms.PTransform;
  import org.apache.beam.sdk.transforms.windowing.FixedWindows;
  import org.apache.beam.sdk.transforms.windowing.Window;
  import org.apache.beam.sdk.values.PCollection;
  import org.apache.beam.sdk.values.PCollection.IsBounded;
  import org.checkerframework.checker.initialization.qual.Initialized;
  import org.checkerframework.checker.nullness.qual.NonNull;
  import org.checkerframework.checker.nullness.qual.UnknownKeyFor;
  import org.joda.time.Duration;
  
  public class ErrorHandlingTestUtils {
    public static class ErrorSinkTransform
        extends PTransform<PCollection<BadRecord>, PCollection<Long>> {
  
      @Override
      public @UnknownKeyFor @NonNull @Initialized PCollection<Long> expand(
          PCollection<BadRecord> input) {
        if (input.isBounded() == IsBounded.BOUNDED) {
          return input.apply("Combine", Combine.globally(Count.<BadRecord>combineFn()));
        } else {
          return input
              .apply("Window", Window.into(FixedWindows.of(Duration.standardDays(1))))
              .apply("Combine", Combine.globally(Count.<BadRecord>combineFn()).withoutDefaults());
        }
      }
    }
  
    public static class EchoErrorTransform
        extends PTransform<PCollection<BadRecord>, PCollection<BadRecord>> {
  
      @Override
      public PCollection<BadRecord> expand(PCollection<BadRecord> input) {
        return input;
      }
    }
  }
  