eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/checklist/handler/CreateDescriptionElementHandler.java

   1 // $Id$
   2 /**
   3  * Copyright (C) 2007 EDIT
   4  * European Distributed Institute of Taxonomy
   5  * http://www.e-taxonomy.eu
   6  *
   7  * The contents of this file are subject to the Mozilla Public License Version 1.1
   8  * See LICENSE.TXT at the top of this package for the full license terms.
   9  */
  10
  11 package eu.etaxonomy.taxeditor.editor.view.checklist.handler;
  12
  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.core.commands.common.NotDefinedException;
  17 import org.eclipse.jface.viewers.ISelection;
  18 import org.eclipse.jface.viewers.IStructuredSelection;
  19 import org.eclipse.jface.viewers.ITreeSelection;
  20 import org.eclipse.jface.viewers.TreePath;
  21 import org.eclipse.swt.widgets.Event;
  22 import org.eclipse.ui.IWorkbenchPart;
  23 import org.eclipse.ui.handlers.HandlerUtil;
  24
  25 import eu.etaxonomy.cdm.model.description.DescriptionBase;
  26 import eu.etaxonomy.cdm.model.description.Feature;
  27 import eu.etaxonomy.taxeditor.editor.EditorUtil;
  28 import eu.etaxonomy.taxeditor.editor.view.descriptive.operation.CreateDescriptionElementOperation;
  29 import eu.etaxonomy.taxeditor.model.AbstractUtility;
  30 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  31 import eu.etaxonomy.taxeditor.operation.AbstractPostOperation;
  32 import eu.etaxonomy.taxeditor.operation.IPostOperationEnabled;
  33
  34 /**
  35  * <p>CreateDescriptionElementHandler class.</p>
  36  *
  37  * @author n.hoffmann
  38  * @created 16.04.2009
  39  * @version 1.0
  40  */
  41 public class CreateDescriptionElementHandler extends AbstractHandler {
  42
  43         /*
  44          * (non-Javadoc)
  45          *
  46          * @see
  47          * org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.
  48          * ExecutionEvent)
  49          */
  50     /** {@inheritDoc} */
  51     @Override
  52     public Object execute(ExecutionEvent event) throws ExecutionException {
  53         IWorkbenchPart part = HandlerUtil.getActivePart(event);
  54         IPostOperationEnabled postOperationEnabled = (part instanceof IPostOperationEnabled) ? (IPostOperationEnabled) part
  55                 : null;
  56
  57
  58         DescriptionBase<?> description = null;
  59
  60         ISelection selection = HandlerUtil.getCurrentSelection(event);
  61         Object selectedElement = null;
  62         if (selection instanceof ITreeSelection) {
  63             TreePath[] paths = ((ITreeSelection) selection).getPaths();
  64             selectedElement = paths[0].getFirstSegment();
  65         }
  66         else if (selection instanceof IStructuredSelection) {
  67             selectedElement = ((IStructuredSelection) selection).getFirstElement();
  68         }
  69         if (selectedElement instanceof DescriptionBase<?>) {
  70             description = (DescriptionBase<?>) selectedElement;
  71         }
  72
  73         if (description != null) {
  74             AbstractPostOperation operation = null;
  75             try {
  76                 // TODO use undo context specific to editor
  77                 operation = operationCreationInstance(event.getCommand().getName(), event, description, postOperationEnabled);
  78                 AbstractUtility.executeOperation(operation);
  79             } catch (NotDefinedException e) {
  80                 MessagingUtils.warn(getClass(), "Command name not set");
  81             }
  82         } else {
  83             MessagingUtils.error(getClass(), new IllegalArgumentException("Could not determine the taxon description"));
  84             return null;
  85         }
  86         return null;
  87
  88     }
  89
  90     /**
  91          * Added to make the Class more generic and limit the amount of code changes required
  92          * @param label
  93          * @param event
  94          * @param taxon
  95          * @param description
  96          * @param postOperationEnabled
  97          * @return
  98          */
  99         protected AbstractPostOperation operationCreationInstance(String label, ExecutionEvent event, DescriptionBase<?> description, IPostOperationEnabled postOperationEnabled) {
 100                 Feature feature = (Feature) ((Event) event.getTrigger()).data;
 101                 return new CreateDescriptionElementOperation(label, EditorUtil.getUndoContext(), description, feature, postOperationEnabled);
 102         }
 103
 104 }