Move Eclipse components which are JCR specific.

[lgpl/argeo-commons.git] / org.argeo.cms.ui / src / org / argeo / eclipse / ui / jcr / NodeElementComparer.java

diff --git a/org.argeo.cms.ui/src/org/argeo/eclipse/ui/jcr/NodeElementComparer.java b/org.argeo.cms.ui/src/org/argeo/eclipse/ui/jcr/NodeElementComparer.java
new file mode 100644 (file)
index 0000000..2f3d64d
--- /dev/null
+++ b/org.argeo.cms.ui/src/org/argeo/eclipse/ui/jcr/NodeElementComparer.java
@@ -0,0 +1,36 @@
+package org.argeo.eclipse.ui.jcr;\r
+\r
+import javax.jcr.Node;\r
+import javax.jcr.RepositoryException;\r
+\r
+import org.argeo.eclipse.ui.EclipseUiException;\r
+import org.eclipse.jface.viewers.IElementComparer;\r
+\r
+/** Element comparer for JCR node, to be used in JFace viewers. */\r
+public class NodeElementComparer implements IElementComparer {\r
+\r
+       public boolean equals(Object a, Object b) {\r
+               try {\r
+                       if ((a instanceof Node) && (b instanceof Node)) {\r
+                               Node nodeA = (Node) a;\r
+                               Node nodeB = (Node) b;\r
+                               return nodeA.getIdentifier().equals(nodeB.getIdentifier());\r
+                       } else {\r
+                               return a.equals(b);\r
+                       }\r
+               } catch (RepositoryException e) {\r
+                       throw new EclipseUiException("Cannot compare nodes", e);\r
+               }\r
+       }\r
+\r
+       public int hashCode(Object element) {\r
+               try {\r
+                       if (element instanceof Node)\r
+                               return ((Node) element).getIdentifier().hashCode();\r
+                       return element.hashCode();\r
+               } catch (RepositoryException e) {\r
+                       throw new EclipseUiException("Cannot get hash code", e);\r
+               }\r
+       }\r
+\r
+}\r