content: /*
   * Copyright 2021 4Paradigm
   *
   * Licensed 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 com._4paradigm.openmldb.java_sdk_test.checker;
  
  
  import com._4paradigm.openmldb.test_common.common.ReportLog;
  import lombok.extern.slf4j.Slf4j;
  
  import java.util.Comparator;
  import java.util.List;
  
  /**
   * @author zhaowei
   * @date 2021/3/10 6:35 PM
   */
  @Slf4j
  public class RowsSort implements Comparator<List> {
      private int index;
      private ReportLog reportLog = ReportLog.of();
  
      public RowsSort(int index) {
          this.index = index;
          if (-1 == index) {
              log.warn("compare without index");
              reportLog.warn("compare without index");
          }
      }
  
      @Override
      public int compare(List o1, List o2) {
          if (-1 == index) {
  
              return 0;
          }
          Object obj1 = o1.get(index);
          Object obj2 = o2.get(index);
          if (obj1 == obj2) {
              return 0;
          }
          if (obj1 == null) {
              return -1;
          }
          if (obj2 == null) {
              return 1;
          }
          if (obj1 instanceof Comparable && obj2 instanceof Comparable) {
              return ((Comparable) obj1).compareTo(obj2);
          } else {
              return obj1.hashCode() - obj2.hashCode();
          }
      }
  }
  