content: package org.apache.archiva.configuration.model.functors;
  
  /*
   * 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.
   */
  
  import org.apache.archiva.configuration.model.ProxyConnectorConfiguration;
  
  import java.util.Comparator;
  
  /**
   *
   * Was marked as deprecated before, but is still used.
   *
   */
  public class ProxyConnectorConfigurationOrderComparator
      implements Comparator<ProxyConnectorConfiguration>
  {
      private static ProxyConnectorConfigurationOrderComparator INSTANCE =
          new ProxyConnectorConfigurationOrderComparator();
  
      @Override
      public int compare( ProxyConnectorConfiguration o1, ProxyConnectorConfiguration o2 )
      {
          if ( o1 == null && o2 == null )
          {
              return 0;
          }
  
          // Ensure null goes to end of list.
          if ( o1 == null && o2 != null )
          {
              return 1;
          }
  
          if ( o1 != null && o2 == null )
          {
              return -1;
          }
  
          // Ensure 0 (unordered) goes to end of list.
          if ( o1.getOrder() == 0 && o2.getOrder() != 0 )
          {
              return 1;
          }
  
          if ( o1.getOrder() != 0 && o2.getOrder() == 0 )
          {
              return -1;
          }
  
          return o1.getOrder() - o2.getOrder();
      }
  
      public static ProxyConnectorConfigurationOrderComparator getInstance()
      {
          return INSTANCE;
      }
  }
  