eclipse/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/commands/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.apache.commons.logging.Log;
   9 import org.apache.commons.logging.LogFactory;
  10 import org.argeo.ArgeoException;
  11 import org.argeo.eclipse.ui.dialogs.Error;
  12 import org.argeo.eclipse.ui.jcr.views.AbstractJcrBrowser;
  13 import org.eclipse.core.commands.AbstractHandler;
  14 import org.eclipse.core.commands.ExecutionEvent;
  15 import org.eclipse.core.commands.ExecutionException;
  16 import org.eclipse.jface.viewers.ISelection;
  17 import org.eclipse.jface.viewers.IStructuredSelection;
  18 import org.eclipse.ui.handlers.HandlerUtil;
  19
  20 /** Deletes the selected nodes */
  21 public class DeleteNode extends AbstractHandler {
  22         private final static Log log = LogFactory.getLog(DeleteNode.class);
  23
  24         public Object execute(ExecutionEvent event) throws ExecutionException {
  25                 ISelection selection = HandlerUtil.getActiveWorkbenchWindow(event)
  26                                 .getActivePage().getSelection();
  27                 AbstractJcrBrowser view = (AbstractJcrBrowser) HandlerUtil
  28                                 .getActiveWorkbenchWindow(event).getActivePage()
  29                                 .findView(HandlerUtil.getActivePartId(event));
  30
  31                 if (selection != null && selection instanceof IStructuredSelection) {
  32                         Iterator<?> it = ((IStructuredSelection) selection).iterator();
  33                         Object obj = null;
  34                         Node ancestor = null;
  35                         try {
  36                                 while (it.hasNext()) {
  37                                         obj = it.next();
  38                                         if (obj instanceof Node) {
  39                                                 Node node = (Node) obj;
  40                                                 Node parentNode = node.getParent();
  41                                                 node.remove();
  42                                                 node.getSession().save();
  43                                                 ancestor = getOlder(ancestor, parentNode);
  44                                         }
  45                                 }
  46                                 if (ancestor != null)
  47                                         view.nodeRemoved(ancestor);
  48                         } catch (Exception e) {
  49                                 Error.show("Cannot delete node " + obj, e);
  50                         }
  51                 }
  52                 return null;
  53         }
  54
  55         private Node getOlder(Node A, Node B) {
  56                 try {
  57
  58                         if (A == null)
  59                                 return B == null ? null : B;
  60                         // Todo enhanced this method
  61                         else
  62                                 return A.getDepth() <= B.getDepth() ? A : B;
  63                 } catch (RepositoryException re) {
  64                         throw new ArgeoException("Cannot find ancestor", re);
  65                 }
  66         }
  67 }