eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/descriptive/handler/DeleteHandler.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 java.util.ArrayList;
  14 import java.util.List;
  15
  16 import org.eclipse.core.commands.AbstractHandler;
  17 import org.eclipse.core.commands.ExecutionEvent;
  18 import org.eclipse.core.commands.ExecutionException;
  19 import org.eclipse.core.commands.common.NotDefinedException;
  20 import org.eclipse.core.commands.operations.IUndoContext;
  21 import org.eclipse.jface.viewers.IStructuredSelection;
  22 import org.eclipse.jface.viewers.TreePath;
  23 import org.eclipse.jface.viewers.TreeSelection;
  24 import org.eclipse.ui.IWorkbenchPart;
  25 import org.eclipse.ui.handlers.HandlerUtil;
  26
  27 import eu.etaxonomy.cdm.model.description.DescriptionElementBase;
  28 import eu.etaxonomy.cdm.model.description.TaxonDescription;
  29 import eu.etaxonomy.cdm.model.media.Media;
  30 import eu.etaxonomy.taxeditor.editor.EditorUtil;
  31 import eu.etaxonomy.taxeditor.editor.view.descriptive.operation.DeleteDescriptionElementOperation;
  32 import eu.etaxonomy.taxeditor.editor.view.descriptive.operation.DeleteTaxonDescriptionOperation;
  33 import eu.etaxonomy.taxeditor.editor.view.media.operation.DeleteMediaOperation;
  34 import eu.etaxonomy.taxeditor.model.FeatureNodeContainer;
  35 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  36 import eu.etaxonomy.taxeditor.operation.AbstractPostTaxonOperation;
  37 import eu.etaxonomy.taxeditor.operation.AbstractPostOperation;
  38 import eu.etaxonomy.taxeditor.operation.IPostOperationEnabled;
  39
  40 /**
  41  * <p>DeleteDescriptionHandler class.</p>
  42  *
  43  * @author n.hoffmann
  44  * @created Jun 22, 2010
  45  * @version 1.0
  46  */
  47 public class DeleteHandler extends AbstractHandler {
  48
  49         /* (non-Javadoc)
  50          * @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent)
  51          */
  52         /** {@inheritDoc} */
  53         public Object execute(ExecutionEvent event) throws ExecutionException {
  54                 IStructuredSelection selection = (IStructuredSelection) HandlerUtil.getActiveSite(event).getSelectionProvider().getSelection();
  55
  56                 IWorkbenchPart part = HandlerUtil.getActivePart(event);
  57                 IPostOperationEnabled postOperationEnabled = (part instanceof IPostOperationEnabled) ? (IPostOperationEnabled) part : null;
  58
  59                 try {
  60                         String label = event.getCommand().getName();
  61
  62                         IUndoContext undoContext = EditorUtil.getUndoContext();
  63
  64                         List<AbstractPostTaxonOperation> operations = new ArrayList<AbstractPostTaxonOperation>();
  65
  66                         for(Object object : selection.toArray()){
  67
  68                                 AbstractPostOperation operation = null;
  69
  70                                 // TaxonDescription
  71                                 if(object instanceof TaxonDescription){
  72                                         operations.add(new DeleteTaxonDescriptionOperation(label, undoContext, (TaxonDescription) object, postOperationEnabled));
  73                                 }
  74                                 // DescriptionElementBase
  75                                 else if(object instanceof DescriptionElementBase){
  76                                         operations.add(new DeleteDescriptionElementOperation(label, undoContext, (DescriptionElementBase) object, postOperationEnabled));
  77                                 }
  78                                 else if(object instanceof FeatureNodeContainer){
  79                                         List<DescriptionElementBase> descriptions = ((FeatureNodeContainer) object).getDescriptionElementsForEntireBranch();
  80
  81                                         for(DescriptionElementBase description : descriptions){
  82                                                 operations.add(new DeleteDescriptionElementOperation(label, undoContext, description, postOperationEnabled));
  83                                         }
  84                                 }
  85                                 // Media
  86                                 else if(object instanceof Media){
  87                                         TreeSelection treeSelection = (TreeSelection) selection;
  88
  89                                         TreePath[] path = treeSelection.getPathsFor(object);
  90
  91                                         TaxonDescription imageGallery = (TaxonDescription) path[0].getFirstSegment();
  92
  93                                         operations.add(new DeleteMediaOperation(label, undoContext, imageGallery, (Media) object, postOperationEnabled));
  94                                 }
  95                                 else{
  96                                         MessagingUtils.error(getClass(), "Selection is not valid for this delete handler", null);
  97                                 }
  98                         }
  99
 100                         // execute all cumulated operations
 101                         for(AbstractPostOperation operation : operations){
 102                                 EditorUtil.executeOperation(operation);
 103                         }
 104
 105                 } catch (NotDefinedException e) {
 106                         MessagingUtils.warn(getClass(), "Command name not set.");
 107                 }
 108
 109
 110                 return null;
 111         }
 112 }