X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;f=org.argeo.cms.ui%2Fsrc%2Forg%2Fargeo%2Feclipse%2Fui%2Fjcr%2Flists%2FRowViewerComparator.java;fp=org.argeo.cms.ui%2Fsrc%2Forg%2Fargeo%2Feclipse%2Fui%2Fjcr%2Flists%2FRowViewerComparator.java;h=455fb0dcd213deb5a320b7b0e639054a1e9685c0;hb=d169026cb1939009fd90ac46a11f480cb3d803c0;hp=0000000000000000000000000000000000000000;hpb=a1e5c8447beec2b896b0a03e38a4c17608a4b85d;p=lgpl%2Fargeo-commons.git

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
index 000000000..455fb0dcd
--- /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);
+		}
+	}
+}