DeleteNode.java

   1 package org.argeo.eclipse.ui.jcr.commands;
   2
   3 import java.util.Iterator;
   4
   5 import javax.jcr.Node;
   6 import javax.jcr.RepositoryException;
   7
   8 import org.argeo.ArgeoException;
   9 import org.argeo.eclipse.ui.ErrorFeedback;
  10 import org.argeo.eclipse.ui.jcr.views.AbstractJcrBrowser;
  11 import org.eclipse.core.commands.AbstractHandler;
  12 import org.eclipse.core.commands.ExecutionEvent;
  13 import org.eclipse.core.commands.ExecutionException;
  14 import org.eclipse.jface.viewers.ISelection;
  15 import org.eclipse.jface.viewers.IStructuredSelection;
  16 import org.eclipse.ui.handlers.HandlerUtil;
  17
  18 /** Deletes the selected nodes */
  19 public class DeleteNode extends AbstractHandler {
  20         public Object execute(ExecutionEvent event) throws ExecutionException {
  21                 ISelection selection = HandlerUtil.getActiveWorkbenchWindow(event)
  22                                 .getActivePage().getSelection();
  23                 AbstractJcrBrowser view = (AbstractJcrBrowser) HandlerUtil
  24                                 .getActiveWorkbenchWindow(event).getActivePage()
  25                                 .findView(HandlerUtil.getActivePartId(event));
  26
  27                 if (selection != null && selection instanceof IStructuredSelection) {
  28                         Iterator<?> it = ((IStructuredSelection) selection).iterator();
  29                         Object obj = null;
  30                         Node ancestor = null;
  31                         try {
  32                                 while (it.hasNext()) {
  33                                         obj = it.next();
  34                                         if (obj instanceof Node) {
  35                                                 Node node = (Node) obj;
  36                                                 Node parentNode = node.getParent();
  37                                                 node.remove();
  38                                                 node.getSession().save();
  39                                                 ancestor = getOlder(ancestor, parentNode);
  40                                         }
  41                                 }
  42                                 if (ancestor != null)
  43                                         view.nodeRemoved(ancestor);
  44                         } catch (Exception e) {
  45                                 ErrorFeedback.show("Cannot delete node " + obj, e);
  46                         }
  47                 }
  48                 return null;
  49         }
  50
  51         private Node getOlder(Node A, Node B) {
  52                 try {
  53
  54                         if (A == null)
  55                                 return B == null ? null : B;
  56                         // Todo enhanced this method
  57                         else
  58                                 return A.getDepth() <= B.getDepth() ? A : B;
  59                 } catch (RepositoryException re) {
  60                         throw new ArgeoException("Cannot find ancestor", re);
  61                 }
  62         }
  63 }