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.extensions.ordered;
  
  import org.checkerframework.checker.nullness.qual.NonNull;
  
  /**
   * Ordered processing handler used for testing.
   *
   * <p>It uses all the defaults of the parent class.
   */
  public class StringBufferOrderedProcessingHandler
      extends OrderedProcessingHandler<String, String, StringBuilderState, String> {
  
    public static class StringBufferOrderedProcessingWithGlobalSequenceHandler
        extends OrderedProcessingGlobalSequenceHandler<String, String, StringBuilderState, String> {
  
      private final EventExaminer<String, StringBuilderState> eventExaminer;
  
      public StringBufferOrderedProcessingWithGlobalSequenceHandler(
          int emissionFrequency, long initialSequence) {
        super(String.class, String.class, StringBuilderState.class, String.class);
        this.eventExaminer = new StringEventExaminer(initialSequence, emissionFrequency);
      }
  
      @Override
      @NonNull
      public EventExaminer<String, StringBuilderState> getEventExaminer() {
        return eventExaminer;
      }
    }
  
    private final EventExaminer<String, StringBuilderState> eventExaminer;
  
    public StringBufferOrderedProcessingHandler(int emissionFrequency, long initialSequence) {
      super(String.class, String.class, StringBuilderState.class, String.class);
      this.eventExaminer = new StringEventExaminer(initialSequence, emissionFrequency);
    }
  
    @Override
    @NonNull
    public EventExaminer<String, StringBuilderState> getEventExaminer() {
      return eventExaminer;
    }
  }
  