taxeditor-store/src/main/java/eu/etaxonomy/taxeditor/operations/DeleteTaxonOperation.java

   1 /**
   2 * Copyright (C) 2007 EDIT
   3 * European Distributed Institute of Taxonomy
   4 * http://www.e-taxonomy.eu
   5 *
   6 * The contents of this file are subject to the Mozilla Public License Version 1.1
   7 * See LICENSE.TXT at the top of this package for the full license terms.
   8 */
   9
  10 package eu.etaxonomy.taxeditor.operations;
  11
  12 import org.apache.log4j.Logger;
  13 import org.eclipse.core.commands.ExecutionException;
  14 import org.eclipse.core.commands.operations.IUndoContext;
  15 import org.eclipse.core.runtime.IAdaptable;
  16 import org.eclipse.core.runtime.IProgressMonitor;
  17 import org.eclipse.core.runtime.IStatus;
  18 import org.eclipse.core.runtime.Status;
  19 import org.eclipse.jface.dialogs.MessageDialog;
  20 import org.eclipse.swt.widgets.Shell;
  21
  22 import eu.etaxonomy.cdm.model.taxon.Taxon;
  23 import eu.etaxonomy.taxeditor.model.TaxonUtil;
  24
  25 /**
  26  * Delete a taxon from the model.
  27  *
  28  * TODO: Currently all data in session data repository has to be saved before deleting
  29  * a taxon and the whole logic is happening here. This way we would have to implement
  30  * the same logic in another place if we want to delete outside of an operation context
  31  * (NOT undoable). Therefore it is desirable to have the logic implemented in another
  32  * place and merely call a method here.
  33  *
  34  * @author n.hoffmann
  35  * @created 16.01.2009
  36  * @version 1.0
  37  */
  38 public class DeleteTaxonOperation extends AbstractPostOperation {
  39
  40         @SuppressWarnings("unused")
  41         private static Logger logger = Logger.getLogger(DeleteTaxonOperation.class);
  42
  43         /**
  44          * The taxonomical parent of the taxon to be deleted.
  45          */
  46         private Taxon parentTaxon;
  47
  48         public DeleteTaxonOperation(String text, IUndoContext undoContext,
  49                         Taxon taxon) {
  50                 super(text, undoContext, taxon, null);
  51
  52                 parentTaxon = taxon.getTaxonomicParent();
  53         }
  54
  55         /* (non-Javadoc)
  56          * @see org.eclipse.core.commands.operations.AbstractOperation#execute(org.eclipse.core.runtime.IProgressMonitor, org.eclipse.core.runtime.IAdaptable)
  57          */
  58         @Override
  59         public IStatus execute(IProgressMonitor monitor, IAdaptable info)
  60                         throws ExecutionException {
  61
  62                 // Get taxon name - watch out for null names
  63                 String taxonName = "";
  64                 if (taxon.getName() != null) {
  65                         taxonName = taxon.getName().getTitleCache();
  66                 }
  67
  68                 // Prompt user for confirmation
  69                 if(! MessageDialog.openConfirm((Shell) info.getAdapter(Shell.class), "Confirm Deletion", "Are you sure you want to delete taxon '" + taxonName + "'?")){
  70                         monitor.done();
  71                         return Status.CANCEL_STATUS;
  72                 }
  73
  74
  75                 // If the taxon has children, cancel operation
  76                 // TODO add option to continue, and delete children
  77                 if (taxon.hasTaxonomicChildren()) {
  78                         MessageDialog.openInformation((Shell) info.getAdapter(Shell.class), "Cannot delete taxon",
  79                                         "'" + taxonName + "' has taxonomic children. " +
  80                                         "These must be manually deleted before their parent.");
  81                         monitor.done();
  82                         return Status.CANCEL_STATUS;
  83                 }
  84
  85                 // delete the taxon in an isolated conversation
  86                 TaxonUtil.deleteTaxonBaseIsolated(taxon.getUuid());
  87
  88
  89                 return postExecute(null);
  90         }
  91
  92         /* (non-Javadoc)
  93          * @see org.eclipse.core.commands.operations.AbstractOperation#redo(org.eclipse.core.runtime.IProgressMonitor, org.eclipse.core.runtime.IAdaptable)
  94          */
  95         @Override
  96         public IStatus redo(IProgressMonitor monitor, IAdaptable info)
  97                         throws ExecutionException {
  98                 return execute(monitor, info);
  99         }
 100
 101         /* (non-Javadoc)
 102          * @see org.eclipse.core.commands.operations.AbstractOperation#undo(org.eclipse.core.runtime.IProgressMonitor, org.eclipse.core.runtime.IAdaptable)
 103          */
 104         @Override
 105         public IStatus undo(IProgressMonitor monitor, IAdaptable info)
 106                         throws ExecutionException {
 107                 // FIXME we have to add old citation
 108                 parentTaxon.addTaxonomicChild(taxon, null, null);
 109                 // FIXME readding has to take place in an isolated conversation as well
 110                 // so that all the mediation magic does the rest for us
 111                 return postExecute(null);
 112         }
 113 }