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
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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 storm.trident.operation.builtin;
  
  import java.util.Comparator;
  
  /**
   * This aggregator computes the maximum of aggregated tuples in a stream. It uses given {@code comparator} for comparing
   * two values in a stream.
   *
   */
  public class MaxWithComparator<T> extends ComparisonAggregator<T> {
      private final Comparator<T> comparator;
      
      public MaxWithComparator(Comparator<T> comparator) {
          this(null, comparator);
      }
  
      public MaxWithComparator(String inputFieldName, Comparator<T> comparator) {
          super(inputFieldName);
          this.comparator = comparator;
      }
  
      @Override
      protected T compare(T value1, T value2) {
          return comparator.compare(value1, value2) > 0 ? value1 : value2;
      }
  
      @Override
      public String toString() {
          return "MaxWithComparator{" +
                  "comparator=" + comparator +
                  '}';
      }
  }
  