eclipse/org.argeo.cms.e4/src/org/argeo/cms/e4/jcr/handlers/DeleteNodes.java

   1 package org.argeo.cms.e4.jcr.handlers;
   2
   3 import java.util.List;
   4
   5 import javax.inject.Named;
   6 import javax.jcr.Node;
   7 import javax.jcr.RepositoryException;
   8
   9 import org.argeo.cms.e4.jcr.JcrBrowserView;
  10 import org.argeo.cms.ui.jcr.model.SingleJcrNodeElem;
  11 import org.argeo.cms.ui.jcr.model.WorkspaceElem;
  12 import org.argeo.eclipse.ui.EclipseUiException;
  13 import org.argeo.eclipse.ui.TreeParent;
  14 import org.argeo.eclipse.ui.dialogs.ErrorFeedback;
  15 import org.eclipse.e4.core.di.annotations.Execute;
  16 import org.eclipse.e4.ui.model.application.ui.basic.MPart;
  17 import org.eclipse.e4.ui.services.IServiceConstants;
  18 import org.eclipse.e4.ui.workbench.modeling.ESelectionService;
  19 import org.eclipse.jface.dialogs.MessageDialog;
  20 import org.eclipse.swt.widgets.Display;
  21
  22 /**
  23  * Delete the selected nodes: both in the JCR repository and in the UI view.
  24  * Warning no check is done, except implementation dependent native checks,
  25  * handle with care.
  26  *
  27  * This handler is still 'hard linked' to a GenericJcrBrowser view to enable
  28  * correct tree refresh when a node is added. This must be corrected in future
  29  * versions.
  30  */
  31 public class DeleteNodes {
  32         @Execute
  33         public void execute(@Named(IServiceConstants.ACTIVE_PART) MPart part, ESelectionService selectionService) {
  34                 List<?> selection = (List<?>) selectionService.getSelection();
  35                 if (selection == null)
  36                         return;
  37
  38                 JcrBrowserView view = (JcrBrowserView) part.getObject();
  39
  40                 // confirmation
  41                 StringBuffer buf = new StringBuffer("");
  42                 for (Object o : selection) {
  43                         SingleJcrNodeElem sjn = (SingleJcrNodeElem) o;
  44                         buf.append(sjn.getName()).append(' ');
  45                 }
  46                 Boolean doRemove = MessageDialog.openConfirm(Display.getCurrent().getActiveShell(), "Confirm deletion",
  47                                 "Do you want to delete " + buf + "?");
  48
  49                 // operation
  50                 if (doRemove) {
  51                         SingleJcrNodeElem ancestor = null;
  52                         WorkspaceElem rootAncestor = null;
  53                         try {
  54                                 for (Object obj : selection) {
  55                                         if (obj instanceof SingleJcrNodeElem) {
  56                                                 // Cache objects
  57                                                 SingleJcrNodeElem sjn = (SingleJcrNodeElem) obj;
  58                                                 TreeParent tp = (TreeParent) sjn.getParent();
  59                                                 Node node = sjn.getNode();
  60
  61                                                 // Jcr Remove
  62                                                 node.remove();
  63                                                 node.getSession().save();
  64                                                 // UI remove
  65                                                 tp.removeChild(sjn);
  66
  67                                                 // Check if the parent is the root node
  68                                                 if (tp instanceof WorkspaceElem)
  69                                                         rootAncestor = (WorkspaceElem) tp;
  70                                                 else
  71                                                         ancestor = getOlder(ancestor, (SingleJcrNodeElem) tp);
  72                                         }
  73                                 }
  74                                 if (rootAncestor != null)
  75                                         view.nodeRemoved(rootAncestor);
  76                                 else if (ancestor != null)
  77                                         view.nodeRemoved(ancestor);
  78                         } catch (Exception e) {
  79                                 ErrorFeedback.show("Cannot delete selected node ", e);
  80                         }
  81                 }
  82         }
  83
  84         private SingleJcrNodeElem getOlder(SingleJcrNodeElem A, SingleJcrNodeElem B) {
  85                 try {
  86                         if (A == null)
  87                                 return B == null ? null : B;
  88                         // Todo enhanced this method
  89                         else
  90                                 return A.getNode().getDepth() <= B.getNode().getDepth() ? A : B;
  91                 } catch (RepositoryException re) {
  92                         throw new EclipseUiException("Cannot find ancestor", re);
  93                 }
  94         }
  95 }