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;
  
  /** Test event examiner. */
  class StringEventExaminer implements EventExaminer<String, StringBuilderState> {
  
    public static final String LAST_INPUT = "z";
    private final long initialSequence;
    private final int emissionFrequency;
  
    public StringEventExaminer(long initialSequence, int emissionFrequency) {
      this.initialSequence = initialSequence;
      this.emissionFrequency = emissionFrequency;
    }
  
    @Override
    public boolean isInitialEvent(long sequenceNumber, String input) {
      return sequenceNumber == initialSequence;
    }
  
    @Override
    public StringBuilderState createStateOnInitialEvent(String input) {
      return new StringBuilderState(input, emissionFrequency);
    }
  
    @Override
    public boolean isLastEvent(long sequenceNumber, String input) {
      return input.equals(LAST_INPUT);
    }
  }
  