eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/checklist/ChecklistEditorComparator.java

   1 /**
   2 * Copyright (C) 2007 EDIT
   3 * European Distributed Institute of Taxonomy
   4 * http://www.e-taxonomy.eu
   5 *
   6 * The contents of this file are subject to the Mozilla Public License Version 1.1
   7 * See LICENSE.TXT at the top of this package for the full license terms.
   8 */
   9
  10 package eu.etaxonomy.taxeditor.editor.view.checklist;
  11
  12 import org.eclipse.jface.viewers.Viewer;
  13 import org.eclipse.jface.viewers.ViewerComparator;
  14
  15 import eu.etaxonomy.cdm.model.taxon.Taxon;
  16
  17 /**
  18  * @author a.oppermann
  19  * @created 30.04.2014
  20  * @version 1.0
  21  */
  22 public class ChecklistEditorComparator extends ViewerComparator {
  23
  24         private int propertyIndex;
  25         private static final int ASCENDING = 0;
  26         private static final int DESCENDING = 1;
  27         private int direction = ASCENDING;
  28
  29         public ChecklistEditorComparator() {
  30                 this.propertyIndex = 1;
  31                 direction = ASCENDING;
  32         }
  33
  34         public void setColumn(int column) {
  35                 if (column == this.propertyIndex) {
  36                         // Same column as last sort; toggle the direction
  37                         direction = 1 - direction;
  38                 } else {
  39                         // New column; do an ascending sort
  40                         this.propertyIndex = column;
  41                         direction = DESCENDING;
  42                 }
  43         }
  44
  45         /* (non-Javadoc)
  46          * @see org.eclipse.jface.viewers.ViewerComparator#compare(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
  47          */
  48         @Override
  49         public int compare(Viewer viewer, Object e1, Object e2) {
  50           Taxon d1 = (Taxon) e1;
  51           Taxon d2 = (Taxon) e2;
  52
  53                 int result = 0;
  54
  55                 switch (propertyIndex) {
  56
  57                         default:
  58                                 result = d1.getTitleCache().compareTo(d2.getTitleCache());
  59                 }
  60
  61                 // If descending order, flip the direction
  62                 if (direction == DESCENDING) {
  63                         result = -result;
  64                 }
  65                 return result;
  66         }
  67 }