content: /*
   * This library is part of OpenCms -
   * the Open Source Content Management System
   *
   * Copyright (c) Alkacon Software GmbH & Co. KG (https://www.alkacon.com)
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   * Lesser General Public License for more details.
   *
   * For further information about Alkacon Software GmbH & Co. KG, please see the
   * company website: https://www.alkacon.com
   *
   * For further information about OpenCms, please see the
   * project website: https://www.opencms.org
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  
  package org.opencms.file.collectors;
  
  import org.opencms.file.I_CmsResource;
  
  import java.util.Comparator;
  
  /**
   * Wrapper around a comparator that inverts comparison results which may e.g. be
   * used to invert sort orders. <p>
   *
   * This is used to create <code>{@link java.util.SortedSet}</code> instances that may
   * sort in different order (ascending vs. descending).<p>
   *
   * <table border="1">
   * <tr>
   * <th>Internal comparator result</th>
   * <th>Transformed result</th>
   * </tr>
   * <tr>
   * <td>-1</td>
   * <td>+1</td>
   * </tr>
   * <tr>
   * <td>0</td>
   * <td>0</td>
   * </tr>
   * <tr>
   * <td>+1</td>
   * <td>-1</td>
   * </tr>
   * </table>
   * <p>
   *
   * @since 7.0.3
   *
   */
  public final class ComparatorInverter implements Comparator<I_CmsResource> {
  
      /** The comparator to invert. */
      private Comparator<I_CmsResource> m_delegate;
  
      /**
       * Creates a comparator that will invert the result of the given comparator.
       * <p>
       *
       * @param toInvert the comparator to invert results of
       */
      public ComparatorInverter(Comparator<I_CmsResource> toInvert) {
  
          m_delegate = toInvert;
      }
  
      /**
       * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
       */
      public int compare(I_CmsResource o1, I_CmsResource o2) {
  
          int result = m_delegate.compare(o1, o2);
          return -result;
      }
  }