taxeditor-bulkeditor/src/main/java/eu/etaxonomy/taxeditor/annotatedlineeditor/IdentifiableEntityComparator.java

   1 // $Id$
   2 /**
   3 * Copyright (C) 2007 EDIT
   4 * European Distributed Institute of Taxonomy
   5 * http://www.e-taxonomy.eu
   6 *
   7 * The contents of this file are subject to the Mozilla Public License Version 1.1
   8 * See LICENSE.TXT at the top of this package for the full license terms.
   9 */
  10
  11 package eu.etaxonomy.taxeditor.annotatedlineeditor;
  12
  13 import java.util.Comparator;
  14
  15 import org.apache.log4j.Logger;
  16
  17 import eu.etaxonomy.cdm.model.common.IdentifiableEntity;
  18
  19 /**
  20  * <p>IdentifiableEntityComparator class.</p>
  21  *
  22  * @author p.ciardelli
  23  * @created 19.08.2009
  24  * @version 1.0
  25  */
  26 public class IdentifiableEntityComparator implements Comparator {
  27         private static final Logger logger = Logger
  28                         .getLogger(IdentifiableEntityComparator.class);
  29
  30     private boolean fIgnoreCase;
  31
  32         private String getTitleCache(Object o) {
  33                 return o == null || !(o instanceof IdentifiableEntity) ?
  34                                 null : ((IdentifiableEntity) o).getTitleCache();
  35         }
  36
  37         /* (non-Javadoc)
  38          * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
  39          */
  40         /** {@inheritDoc} */
  41         public int compare(Object o1, Object o2) {
  42                 String titleCache1 = getTitleCache(o1);
  43                 String titleCache2 = getTitleCache(o2);
  44                 if (titleCache1 == null && titleCache2 == null) {
  45                         return 0;
  46                 }
  47                 if (titleCache1 == null) {
  48                         return -1;
  49                 }
  50                 if (titleCache2 == null) {
  51                         return 1;
  52                 }
  53         return fIgnoreCase ? titleCache1.compareToIgnoreCase(titleCache2) :
  54                                                         titleCache1.compareTo(titleCache2);
  55         }
  56 }