New project conventions

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

diff --git a/org.argeo.eclipse.ui/src/org/argeo/eclipse/ui/jcr/NodeElementComparer.java b/org.argeo.eclipse.ui/src/org/argeo/eclipse/ui/jcr/NodeElementComparer.java
new file mode 100644 (file)
index 0000000..f284b9c
--- /dev/null
+++ b/org.argeo.eclipse.ui/src/org/argeo/eclipse/ui/jcr/NodeElementComparer.java
@@ -0,0 +1,51 @@
+/*\r
+ * Copyright (C) 2007-2012 Argeo GmbH\r
+ *\r
+ * Licensed under the Apache License, Version 2.0 (the "License");\r
+ * you may not use this file except in compliance with the License.\r
+ * You may obtain a copy of the License at\r
+ *\r
+ *         http://www.apache.org/licenses/LICENSE-2.0\r
+ *\r
+ * Unless required by applicable law or agreed to in writing, software\r
+ * distributed under the License is distributed on an "AS IS" BASIS,\r
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
+ * See the License for the specific language governing permissions and\r
+ * limitations under the License.\r
+ */\r
+package org.argeo.eclipse.ui.jcr;\r
+\r
+import javax.jcr.Node;\r
+import javax.jcr.RepositoryException;\r
+\r
+import org.argeo.ArgeoException;\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 ArgeoException("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 ArgeoException("Cannot get hash code", e);\r
+               }\r
+       }\r
+\r
+}\r