eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/descriptive/handler/DeleteHandler.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.editor.view.descriptive.handler;
  11
  12 import java.util.ArrayList;
  13 import java.util.List;
  14
  15 import org.eclipse.core.commands.AbstractHandler;
  16 import org.eclipse.core.commands.ExecutionEvent;
  17 import org.eclipse.core.commands.ExecutionException;
  18 import org.eclipse.core.commands.common.NotDefinedException;
  19 import org.eclipse.core.commands.operations.IUndoContext;
  20 import org.eclipse.jface.viewers.IStructuredSelection;
  21 import org.eclipse.jface.viewers.TreePath;
  22 import org.eclipse.jface.viewers.TreeSelection;
  23 import org.eclipse.ui.IWorkbenchPart;
  24 import org.eclipse.ui.handlers.HandlerUtil;
  25
  26 import eu.etaxonomy.cdm.model.description.DescriptionBase;
  27 import eu.etaxonomy.cdm.model.description.DescriptionElementBase;
  28 import eu.etaxonomy.cdm.model.description.SpecimenDescription;
  29 import eu.etaxonomy.cdm.model.description.TaxonDescription;
  30 import eu.etaxonomy.cdm.model.media.Media;
  31 import eu.etaxonomy.taxeditor.editor.EditorUtil;
  32 import eu.etaxonomy.taxeditor.editor.view.descriptive.operation.DeleteDescriptionElementOperation;
  33 import eu.etaxonomy.taxeditor.editor.view.descriptive.operation.DeleteSpecimenDescriptionOperation;
  34 import eu.etaxonomy.taxeditor.editor.view.descriptive.operation.DeleteTaxonDescriptionOperation;
  35 import eu.etaxonomy.taxeditor.editor.view.media.operation.DeleteMediaOperation;
  36 import eu.etaxonomy.taxeditor.model.AbstractUtility;
  37 import eu.etaxonomy.taxeditor.model.FeatureNodeContainer;
  38 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  39 import eu.etaxonomy.taxeditor.operation.AbstractPostOperation;
  40 import eu.etaxonomy.taxeditor.operation.IPostOperationEnabled;
  41 import eu.etaxonomy.taxeditor.session.ICdmEntitySessionEnabled;
  42
  43 /**
  44  * <p>DeleteDescriptionHandler class.</p>
  45  *
  46  * @author n.hoffmann
  47  * @created Jun 22, 2010
  48  * @version 1.0
  49  */
  50 public class DeleteHandler extends AbstractHandler {
  51
  52         /* (non-Javadoc)
  53          * @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent)
  54          */
  55         /** {@inheritDoc} */
  56         @Override
  57     public Object execute(ExecutionEvent event) throws ExecutionException {
  58                 IStructuredSelection selection = (IStructuredSelection) HandlerUtil.getActiveSite(event).getSelectionProvider().getSelection();
  59
  60                 IWorkbenchPart part = HandlerUtil.getActivePart(event);
  61                 IPostOperationEnabled postOperationEnabled = (part instanceof IPostOperationEnabled) ? (IPostOperationEnabled) part : null;
  62                 ICdmEntitySessionEnabled cdmEntitySessionEnabled = (part instanceof ICdmEntitySessionEnabled) ? (ICdmEntitySessionEnabled) part : null;
  63
  64                 try {
  65                         String label = event.getCommand().getName();
  66
  67                         IUndoContext undoContext = EditorUtil.getUndoContext();
  68
  69                         List<AbstractPostOperation<?>> operations = new ArrayList<AbstractPostOperation<?>>();
  70
  71                         for(Object object : selection.toArray()){
  72
  73                                 // TaxonDescription
  74                                 if(object instanceof TaxonDescription){
  75                                         operations.add(new DeleteTaxonDescriptionOperation(label, undoContext, (TaxonDescription) object, postOperationEnabled, cdmEntitySessionEnabled));
  76                                 }
  77                                 else if(object instanceof SpecimenDescription){
  78                                     operations.add(new DeleteSpecimenDescriptionOperation(label, undoContext, (SpecimenDescription) object, postOperationEnabled, cdmEntitySessionEnabled)) ;
  79                                 }
  80                                 // DescriptionElementBase
  81                                 else if(object instanceof DescriptionElementBase){
  82                                         operations.add(new DeleteDescriptionElementOperation(label, undoContext, (DescriptionElementBase) object, postOperationEnabled, cdmEntitySessionEnabled));
  83                                 }
  84                                 else if(object instanceof FeatureNodeContainer){
  85                                         List<DescriptionElementBase> descriptions = ((FeatureNodeContainer) object).getDescriptionElementsForEntireBranch();
  86
  87                                         for(DescriptionElementBase description : descriptions){
  88                                                 operations.add(new DeleteDescriptionElementOperation(label, undoContext, description, postOperationEnabled, cdmEntitySessionEnabled));
  89                                         }
  90                                 }
  91                                 // Media
  92                                 else if(object instanceof Media){
  93                                         TreeSelection treeSelection = (TreeSelection) selection;
  94
  95                                         TreePath[] path = treeSelection.getPathsFor(object);
  96
  97                                         DescriptionBase<?> imageGallery = (DescriptionBase<?>) path[0].getFirstSegment();
  98
  99                                         operations.add(new DeleteMediaOperation(label, undoContext, imageGallery, (Media) object, postOperationEnabled));
 100                                 }
 101                                 else{
 102                                         MessagingUtils.error(getClass(), "Selection is not valid for this delete handler", null);
 103                                 }
 104                         }
 105
 106                         // execute all cumulated operations
 107                         for(AbstractPostOperation<?> operation : operations){
 108                                 AbstractUtility.executeOperation(operation);
 109                         }
 110
 111                 } catch (NotDefinedException e) {
 112                         MessagingUtils.warn(getClass(), "Command name not set.");
 113                 }
 114
 115
 116                 return null;
 117         }
 118 }