plugins/org.argeo.slc.akb.ui/src/main/java/org/argeo/slc/akb/ui/utils/AkbItemsComparator.java

   1 package org.argeo.slc.akb.ui.utils;
   2
   3 import javax.jcr.Node;
   4 import javax.jcr.Property;
   5 import javax.jcr.RepositoryException;
   6
   7 import org.argeo.slc.akb.AkbException;
   8 import org.argeo.slc.akb.AkbTypes;
   9 import org.argeo.slc.akb.ui.providers.ActiveTreeItem;
  10 import org.argeo.slc.akb.utils.AkbJcrUtils;
  11 import org.eclipse.jface.viewers.Viewer;
  12 import org.eclipse.jface.viewers.ViewerComparator;
  13
  14 /** Enable specific sorting of the ResultTreeView */
  15 public class AkbItemsComparator extends ViewerComparator {
  16
  17         @Override
  18         public int category(Object element) {
  19                 Node currNode = null;
  20                 if (element instanceof ActiveTreeItem)
  21                         currNode = ((ActiveTreeItem) element).getNode();
  22                 else if (element instanceof Node)
  23                         currNode = (Node) element;
  24                 else if (element instanceof String)
  25                         // TODO why do we have strings
  26                         return 10;
  27                 else
  28                         throw new AkbException("Unsupported tree item element type "
  29                                         + element);
  30
  31                 try {
  32                         if (currNode.isNodeType(AkbTypes.AKB_ITEM_FOLDER))
  33                                 // folder always first
  34                                 return 5;
  35                 } catch (RepositoryException e) {
  36                         throw new AkbException("Cannot retrieve category for item", e);
  37                 }
  38                 return 10;
  39         }
  40
  41         @Override
  42         public int compare(Viewer viewer, Object e1, Object e2) {
  43                 int cat1 = category(e1);
  44                 int cat2 = category(e2);
  45
  46                 if (cat1 != cat2) {
  47                         return cat1 - cat2;
  48                 }
  49
  50                 // TODO we only check on one item, types are not mixed for the time
  51                 // being
  52                 Node an = null;
  53                 Node bn = null;
  54                 if (e1 instanceof ActiveTreeItem) {
  55                         an = ((ActiveTreeItem) e1).getNode();
  56                         bn = ((ActiveTreeItem) e2).getNode();
  57                 } else if (e1 instanceof Node) {
  58                         an = ((Node) e1);
  59                         bn = ((Node) e2);
  60                 } else
  61                         throw new AkbException("Unsupported tree item element type " + e1);
  62
  63                 return super.compare(viewer, AkbJcrUtils.get(an, Property.JCR_TITLE),
  64                                 AkbJcrUtils.get(bn, Property.JCR_TITLE));
  65         }
  66 }