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