eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/descriptive/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.descriptive.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.swt.widgets.Event;
  20 import org.eclipse.ui.IWorkbenchPart;
  21 import org.eclipse.ui.handlers.HandlerUtil;
  22
  23 import eu.etaxonomy.cdm.model.description.DescriptionBase;
  24 import eu.etaxonomy.cdm.model.description.Feature;
  25 import eu.etaxonomy.taxeditor.editor.EditorUtil;
  26 import eu.etaxonomy.taxeditor.editor.view.descriptive.operation.CreateDescriptionElementOperation;
  27 import eu.etaxonomy.taxeditor.model.AbstractUtility;
  28 import eu.etaxonomy.taxeditor.operation.AbstractPostOperation;
  29 import eu.etaxonomy.taxeditor.operation.IPostOperationEnabled;
  30
  31 /**
  32  * <p>CreateDescriptionElementHandler class.</p>
  33  *
  34  * @author n.hoffmann
  35  * @created 16.04.2009
  36  * @version 1.0
  37  */
  38 public class CreateDescriptionElementHandler extends AbstractHandler {
  39
  40         /*
  41          * (non-Javadoc)
  42          *
  43          * @see
  44          * org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.
  45          * ExecutionEvent)
  46          */
  47     /** {@inheritDoc} */
  48     @Override
  49     public Object execute(ExecutionEvent event) throws ExecutionException {
  50         IWorkbenchPart part = HandlerUtil.getActivePart(event);
  51         IPostOperationEnabled postOperationEnabled = (part instanceof IPostOperationEnabled) ? (IPostOperationEnabled) part
  52                 : null;
  53
  54
  55         DescriptionBase<?> description = null;
  56
  57         ISelection selection = HandlerUtil.getCurrentSelection(event);
  58         if (selection instanceof IStructuredSelection) {
  59             Object selectedElement = ((IStructuredSelection) selection).getFirstElement();
  60             if (selectedElement instanceof DescriptionBase<?>) {
  61                 description = (DescriptionBase<?>) selectedElement;
  62             }
  63         }
  64
  65         if (description != null) {
  66             AbstractPostOperation operation = null;
  67             try {
  68                 // TODO use undo context specific to editor
  69                 operation = operationCreationInstance(event.getCommand().getName(), event, description, postOperationEnabled);
  70                 AbstractUtility.executeOperation(operation);
  71             } catch (NotDefinedException e) {
  72                 AbstractUtility.warn(getClass(), "Command name not set");
  73             }
  74         } else {
  75             AbstractUtility.error(getClass(), new IllegalArgumentException("Could not determine the taxon description"));
  76             return null;
  77         }
  78         return null;
  79
  80     }
  81
  82     /**
  83          * Added to make the Class more generic and limit the amount of code changes required
  84          * @param label
  85          * @param event
  86          * @param taxon
  87          * @param description
  88          * @param postOperationEnabled
  89          * @return
  90          */
  91         protected AbstractPostOperation operationCreationInstance(String label, ExecutionEvent event, DescriptionBase<?> description, IPostOperationEnabled postOperationEnabled) {
  92                 Feature feature = (Feature) ((Event) event.getTrigger()).data;
  93                 return new CreateDescriptionElementOperation(label, EditorUtil.getUndoContext(), description, feature, postOperationEnabled);
  94         }
  95
  96 }