EDIT

import org.eclipse.core.commands.operations.AbstractOperation;

import org.eclipse.core.runtime.IStatus;

import org.eclipse.core.runtime.Status;

import org.eclipse.ui.IEditorPart;

import eu.etaxonomy.cdm.api.service.DeleteResult;

import eu.etaxonomy.cdm.api.service.IOccurrenceService;

import eu.etaxonomy.cdm.api.service.molecular.ISequenceService;

import eu.etaxonomy.taxeditor.editor.internal.TaxeditorEditorPlugin;

import eu.etaxonomy.taxeditor.editor.view.derivate.DerivateView;

import eu.etaxonomy.taxeditor.model.DeleteResultMessagingUtils;

import eu.etaxonomy.taxeditor.operation.AbstractPostOperation;

import eu.etaxonomy.taxeditor.operation.RemotingCdmHandler;

import eu.etaxonomy.taxeditor.store.CdmStore;

import eu.etaxonomy.taxeditor.ui.dialog.configurator.deleteConfigurator.DeleteConfiguratorDialog;

public class DeleteDerivateHandler extends RemotingCdmHandler {

    SpecimenDeleteConfigurator deleteConfigurator;

    IEditorPart editor;

    TreeNode node;

    /**

     * @param label

     */

    public DeleteDerivateHandler(String label) {

        super(label);

    }

    /**

     * @param label

     */

    public DeleteDerivateHandler() {

        super(Messages.DeleteDerivateHandler_LABEL);

    }

//    /** {@inheritDoc} */

//    @Override

//    public Object execute(ExecutionEvent event) throws ExecutionException {

//        IStructuredSelection selection = (IStructuredSelection) HandlerUtil.getActiveSite(event).getSelectionProvider().getSelection();

//

//        IWorkbenchPart part = HandlerUtil.getActivePart(event);

//        IPostOperationEnabled postOperationEnabled = (part instanceof IPostOperationEnabled) ? (IPostOperationEnabled) part : null;

//

//        try {

//            String label = event.getCommand().getName();

//

//            IUndoContext undoContext = EditorUtil.getUndoContext();

//

//            if(selection.size()>0){

//                Object object = selection.iterator().next();

//

//                if(object instanceof TreeNode){

//                    Object value = ((TreeNode) object).getValue();

//                    if(value instanceof SpecimenOrObservationBase<?> || value instanceof Sequence || value instanceof SingleRead){

//                        if(postOperationEnabled instanceof IConversationEnabled){

//                            ConversationHolder conversationHolder = ((IConversationEnabled) postOperationEnabled).getConversationHolder();

//                            label += " "+DerivateLabelProvider.getDerivateText(value, conversationHolder); //$NON-NLS-1$

//                        }

//                        SpecimenDeleteConfigurator config = new SpecimenDeleteConfigurator();

//                        boolean deepDelete = event.getCommand().getId().equals("eu.etaxonomy.taxeditor.editor.derivate.deepDelete"); //$NON-NLS-1$

//                        config.setDeleteChildren(deepDelete);

//                        config.setDeleteMolecularData(deepDelete);

//                        DeleteDerivateOperation deleteDerivateOperation = new DeleteDerivateOperation(label, undoContext, (CdmBase) value, (TreeNode) object, postOperationEnabled, config);

//                        IStatus status = AbstractUtility.executeOperation(deleteDerivateOperation);

//                        DerivateView derivateView = (DerivateView)postOperationEnabled;

//                        if(derivateView.postOperation(null)){

//                            derivateView.remove(object);

//

//                           // derivateView.updateRootEntities();

//                            //update DerivateView

//

//

//                        }

//                    }

//                }

//                else{

//                    MessagingUtils.error(getClass(), Messages.DeleteDerivateHandler_INVALID_SELECTION, null);

//                }

//            }

//

//        } catch (NotDefinedException e) {

//            MessagingUtils.warn(getClass(), "Command name not set"); //$NON-NLS-1$

//        }

//        return null;

//    }

    /**

     * {@inheritDoc}

     */

    @Override

    public IStatus allowOperations(ExecutionEvent event) {

        //check whether object can be deleted

        editor = HandlerUtil.getActiveEditor(event);

        IStructuredSelection selection = (IStructuredSelection) HandlerUtil

                .getCurrentSelection(event);

        AbstractPostOperation operation;

        deleteConfigurator = new SpecimenDeleteConfigurator();

        String confirmationQuestion = Messages.DeleteDerivateOperation_REALLY_DELETE;

        if(deleteConfigurator.isDeleteChildren()){

            confirmationQuestion += Messages.DeleteDerivateOperation_AND_CHILDREN;

        }

        if(editor.isDirty()){

            MessagingUtils.warningDialog(DerivateView.VIEW_HAS_UNSAVED_CHANGES, this, DerivateView.YOU_NEED_TO_SAVE_BEFORE_PERFORMING_THIS_ACTION);

            return Status.CANCEL_STATUS;

        }

        confirmationQuestion += "?"; //$NON-NLS-1$

        if(!DeleteConfiguratorDialog.openConfirmWithConfigurator(deleteConfigurator, null, Messages.DeleteDerivateOperation_CONFIRM, confirmationQuestion)){

            return Status.CANCEL_STATUS;

        }

        Object object = selection.iterator().next();

        DeleteResult deleteResult;

        if(object instanceof TreeNode){

            Object value = ((TreeNode) object).getValue();

            if(value instanceof SpecimenOrObservationBase<?> || value instanceof Sequence || value instanceof SingleRead){

                if (value instanceof Sequence || value instanceof SingleRead){

                    deleteResult = CdmStore.getService(ISequenceService.class).isDeletable(((CdmBase)value).getUuid(), deleteConfigurator);

                } else{

                    deleteResult = CdmStore.getService(IOccurrenceService.class).isDeletable(((CdmBase)value).getUuid(), deleteConfigurator);

                }

                if (deleteResult.isOk() || deleteResult.getExceptions().isEmpty()){ return Status.OK_STATUS;}

                else{

                    if (!deleteResult.isOk()){

                        DeleteResultMessagingUtils.messageDialogWithDetails(deleteResult, Messages.DeleteDerivateOperation_DELETE_FAILED, TaxeditorEditorPlugin.PLUGIN_ID);

                    } else {

                        if (!deleteResult.getExceptions().isEmpty()){

                            DeleteResultMessagingUtils.messageDialogWithDetails(deleteResult, Messages.DeleteDerivateHandler_SUCCESSFULL_BUT_EXCEPTIONS, TaxeditorEditorPlugin.PLUGIN_ID);

                        }

                    }

                    return Status.CANCEL_STATUS;

                    }

            }

        }

        return Status.CANCEL_STATUS;

    }

    /**

     * {@inheritDoc}

     */

    public AbstractOperation prepareOperation(ExecutionEvent event) {

                    node = (TreeNode)object;

                        DeleteDerivateOperation deleteDerivateOperation = new DeleteDerivateOperation(label, undoContext, (CdmBase) value, (TreeNode) object, postOperationEnabled, this.deleteConfigurator);

                        return deleteDerivateOperation;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void onComplete() {

        IPostOperationEnabled postOperationEnabled = (editor instanceof IPostOperationEnabled) ? (IPostOperationEnabled) editor : null;

        if (postOperationEnabled != null){

            DerivateView derivateView = (DerivateView)postOperationEnabled;

          if(derivateView.postOperation(null)){

              derivateView.remove(node);

          }

        }