eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/uses/handler/DeleteUseHandler.java

   1 package eu.etaxonomy.taxeditor.editor.view.uses.handler;
   2
   3 import java.util.ArrayList;
   4 import java.util.List;
   5
   6 import org.eclipse.core.commands.AbstractHandler;
   7 import org.eclipse.core.commands.ExecutionEvent;
   8 import org.eclipse.core.commands.ExecutionException;
   9 import org.eclipse.core.commands.common.NotDefinedException;
  10 import org.eclipse.core.commands.operations.IUndoContext;
  11 import org.eclipse.jface.viewers.IStructuredSelection;
  12 import org.eclipse.jface.viewers.TreePath;
  13 import org.eclipse.jface.viewers.TreeSelection;
  14 import org.eclipse.ui.IWorkbenchPart;
  15 import org.eclipse.ui.handlers.HandlerUtil;
  16
  17 import eu.etaxonomy.cdm.model.description.DescriptionElementBase;
  18 import eu.etaxonomy.cdm.model.description.TaxonDescription;
  19 import eu.etaxonomy.cdm.model.media.Media;
  20 import eu.etaxonomy.taxeditor.editor.EditorUtil;
  21 import eu.etaxonomy.taxeditor.editor.view.descriptive.operation.DeleteDescriptionElementOperation;
  22 import eu.etaxonomy.taxeditor.editor.view.media.operation.DeleteMediaOperation;
  23 import eu.etaxonomy.taxeditor.editor.view.uses.operation.DeleteTaxonUseOperation;
  24 import eu.etaxonomy.taxeditor.model.FeatureNodeContainer;
  25 import eu.etaxonomy.taxeditor.operation.AbstractPostOperation;
  26 import eu.etaxonomy.taxeditor.operation.IPostOperationEnabled;
  27
  28 public class DeleteUseHandler extends AbstractHandler {
  29
  30         /*
  31          * (non-Javadoc)
  32          *
  33          * @see
  34          * org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.
  35          * ExecutionEvent)
  36          */
  37         /** {@inheritDoc} */
  38         public Object execute(ExecutionEvent event) throws ExecutionException {
  39                 IStructuredSelection selection = (IStructuredSelection) HandlerUtil
  40                                 .getActiveSite(event).getSelectionProvider().getSelection();
  41
  42                 IWorkbenchPart part = HandlerUtil.getActivePart(event);
  43                 IPostOperationEnabled postOperationEnabled = (part instanceof IPostOperationEnabled) ? (IPostOperationEnabled) part
  44                                 : null;
  45
  46                 try {
  47                         String label = event.getCommand().getName();
  48
  49                         IUndoContext undoContext = EditorUtil.getUndoContext();
  50
  51                         List<AbstractPostOperation> operations = new ArrayList<AbstractPostOperation>();
  52
  53                         for (Object object : selection.toArray()) {
  54
  55                                 AbstractPostOperation operation = null;
  56
  57                                 // TaxonDescription
  58                                 if (object instanceof TaxonDescription) {
  59                                         operations.add(new DeleteTaxonUseOperation(label,
  60                                                         undoContext, (TaxonDescription) object,
  61                                                         postOperationEnabled));
  62                                 }
  63                                 // DescriptionElementBase
  64                                 else if (object instanceof DescriptionElementBase) {
  65                                         operations.add(new DeleteDescriptionElementOperation(label,
  66                                                         undoContext, (DescriptionElementBase) object,
  67                                                         postOperationEnabled));
  68                                 } else if (object instanceof FeatureNodeContainer) {
  69                                         List<DescriptionElementBase> descriptions = ((FeatureNodeContainer) object)
  70                                                         .getDescriptionElementsForEntireBranch();
  71
  72                                         for (DescriptionElementBase description : descriptions) {
  73                                                 operations.add(new DeleteDescriptionElementOperation(
  74                                                                 label, undoContext, description,
  75                                                                 postOperationEnabled));
  76                                         }
  77                                 }
  78                                 // Media
  79                                 else if (object instanceof Media) {
  80                                         TreeSelection treeSelection = (TreeSelection) selection;
  81
  82                                         TreePath[] path = treeSelection.getPathsFor(object);
  83
  84                                         TaxonDescription imageGallery = (TaxonDescription) path[0]
  85                                                         .getFirstSegment();
  86
  87                                         operations
  88                                                         .add(new DeleteMediaOperation(label, undoContext,
  89                                                                         imageGallery, (Media) object,
  90                                                                         postOperationEnabled));
  91                                 } else {
  92                                         EditorUtil.error(getClass(),
  93                                                         "Selection is not valid for this delete handler",
  94                                                         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                 return null;
 108         }
 109 }