eclipse/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/utils/NodeViewerComparer.java

   1 package org.argeo.eclipse.ui.jcr.utils;
   2
   3 import javax.jcr.Node;
   4 import javax.jcr.RepositoryException;
   5
   6 import org.argeo.ArgeoException;
   7 import org.eclipse.jface.viewers.IElementComparer;
   8
   9 public class NodeViewerComparer implements IElementComparer {
  10
  11         // force comparison on Node IDs only.
  12         public boolean equals(Object elementA, Object elementB) {
  13                 if (!(elementA instanceof Node) || !(elementB instanceof Node)) {
  14                         return elementA == null ? elementB == null : elementA
  15                                         .equals(elementB);
  16                 } else {
  17
  18                         boolean result = false;
  19                         try {
  20                                 String idA = ((Node) elementA).getIdentifier();
  21                                 String idB = ((Node) elementB).getIdentifier();
  22                                 result = idA == null ? idB == null : idA.equals(idB);
  23                         } catch (RepositoryException re) {
  24                                 throw new ArgeoException("cannot compare nodes", re);
  25                         }
  26
  27                         return result;
  28                 }
  29         }
  30
  31         public int hashCode(Object element) {
  32                 // TODO enhanced this method.
  33                 return element.getClass().toString().hashCode();
  34         }
  35 }