Move Eclipse components which are JCR specific.

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

diff --git a/org.argeo.cms.ui/src/org/argeo/eclipse/ui/jcr/lists/RowViewerComparator.java b/org.argeo.cms.ui/src/org/argeo/eclipse/ui/jcr/lists/RowViewerComparator.java
new file mode 100644 (file)
index 0000000..455fb0d
--- /dev/null
+++ b/org.argeo.cms.ui/src/org/argeo/eclipse/ui/jcr/lists/RowViewerComparator.java
@@ -0,0 +1,62 @@
+package org.argeo.eclipse.ui.jcr.lists;
+
+import javax.jcr.Node;
+import javax.jcr.RepositoryException;
+import javax.jcr.query.Row;
+
+import org.argeo.eclipse.ui.EclipseUiException;
+import org.eclipse.jface.viewers.Viewer;
+
+/**
+ * Base comparator to enable ordering on Table or Tree viewer that display Jcr
+ * rows
+ */
+public class RowViewerComparator extends NodeViewerComparator {
+       private static final long serialVersionUID = 7020939505172625113L;
+       protected String selectorName;
+
+       public RowViewerComparator() {
+       }
+
+       /**
+        * e1 and e2 must both be Jcr rows.
+        * 
+        * @param viewer
+        * @param e1
+        * @param e2
+        * @return
+        */
+       @Override
+       public int compare(Viewer viewer, Object e1, Object e2) {
+               try {
+                       Node n1 = ((Row) e1).getNode(selectorName);
+                       Node n2 = ((Row) e2).getNode(selectorName);
+                       return super.compare(viewer, n1, n2);
+               } catch (RepositoryException re) {
+                       throw new EclipseUiException("Unexpected error "
+                                       + "while comparing nodes", re);
+               }
+       }
+
+       /**
+        * @param propertyType
+        *            Corresponding JCR type
+        * @param propertyName
+        *            name of the property to use.
+        */
+       public void setColumn(int propertyType, String selectorName,
+                       String propertyName) {
+               if (this.selectorName != null && getPropertyName() != null
+                               && this.selectorName.equals(selectorName)
+                               && this.getPropertyName().equals(propertyName)) {
+                       // Same column as last sort; toggle the direction
+                       setDirection(1 - getDirection());
+               } else {
+                       // New column; do a descending sort
+                       setPropertyType(propertyType);
+                       setPropertyName(propertyName);
+                       this.selectorName = selectorName;
+                       setDirection(NodeViewerComparator.ASCENDING);
+               }
+       }
+}