eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/checklist/ChecklistEditorComparator.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.editor.view.checklist;
  12
  13 import org.eclipse.jface.viewers.Viewer;
  14 import org.eclipse.jface.viewers.ViewerComparator;
  15
  16 import eu.etaxonomy.cdm.model.taxon.Taxon;
  17
  18 /**
  19  * @author a.oppermann
  20  * @created 30.04.2014
  21  * @version 1.0
  22  */
  23 public class ChecklistEditorComparator extends ViewerComparator {
  24
  25         private int propertyIndex;
  26         private static final int ASCENDING = 0;
  27         private static final int DESCENDING = 1;
  28         private int direction = ASCENDING;
  29
  30         public ChecklistEditorComparator() {
  31                 this.propertyIndex = 1;
  32                 direction = ASCENDING;
  33         }
  34
  35         public void setColumn(int column) {
  36                 if (column == this.propertyIndex) {
  37                         // Same column as last sort; toggle the direction
  38                         direction = 1 - direction;
  39                 } else {
  40                         // New column; do an ascending sort
  41                         this.propertyIndex = column;
  42                         direction = DESCENDING;
  43                 }
  44         }
  45
  46         /* (non-Javadoc)
  47          * @see org.eclipse.jface.viewers.ViewerComparator#compare(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
  48          */
  49         @Override
  50         public int compare(Viewer viewer, Object e1, Object e2) {
  51           Taxon d1 = (Taxon) e1;
  52           Taxon d2 = (Taxon) e2;
  53
  54                 int result = 0;
  55
  56                 switch (propertyIndex) {
  57
  58                         default:
  59                                 result = d1.getTitleCache().compareTo(d2.getTitleCache());
  60                 }
  61
  62                 // If descending order, flip the direction
  63                 if (direction == DESCENDING) {
  64                         result = -result;
  65                 }
  66                 return result;
  67         }
  68 }