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.workplace.list;
  
  import java.text.Collator;
  import java.util.Comparator;
  import java.util.Locale;
  
  /**
   * Comparator for case insensitive column sorting with string localization.<p>
   *
   * If both list items column values are Strings then a localized collector is used for sorting;
   * if not, the <code>{@link Comparable}</code> interface is used.<p>
   *
   * @since 6.0.0
   *
   * @see org.opencms.workplace.list.CmsListColumnDefinition
   */
  public class CmsListItemCaseInsensitiveComparator implements I_CmsListItemComparator {
  
      /**
       * Default Constructor.<p>
       */
      public CmsListItemCaseInsensitiveComparator() {
  
          // no-op
      }
  
      /**
       * @see org.opencms.workplace.list.I_CmsListItemComparator#getComparator(java.lang.String, java.util.Locale)
       */
      public Comparator<CmsListItem> getComparator(final String columnId, final Locale locale) {
  
          final Collator collator = Collator.getInstance(locale);
  
          return new Comparator<CmsListItem>() {
  
              /**
               * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
               */
              @SuppressWarnings({"rawtypes", "unchecked"})
              public int compare(CmsListItem o1, CmsListItem o2) {
  
                  Comparable c1 = (Comparable)o1.get(columnId);
                  Comparable c2 = (Comparable)o2.get(columnId);
                  if ((c1 instanceof String) && (c2 instanceof String)) {
                      return collator.compare(((String)c1).toUpperCase(), ((String)c2).toUpperCase());
                  } else if (c1 != null) {
                      if (c2 == null) {
                          return 1;
                      }
                      return c1.compareTo(c2);
                  } else if (c2 != null) {
                      return -1;
                  }
                  return 0;
              }
          };
      }
  }