EDIT

package eu.etaxonomy.taxeditor.editor.name.handler;

import java.util.ArrayList;

import java.util.List;

import java.util.UUID;

import org.apache.log4j.Logger;

import org.eclipse.core.commands.AbstractHandler;

import org.eclipse.core.commands.ExecutionEvent;

import org.eclipse.core.commands.ExecutionException;

import org.eclipse.jface.viewers.StructuredSelection;

import org.eclipse.swt.widgets.Shell;

import org.eclipse.ui.IEditorInput;

import org.eclipse.ui.handlers.HandlerUtil;

import eu.etaxonomy.cdm.model.common.CdmBase;

import eu.etaxonomy.cdm.model.taxon.Synonym;

import eu.etaxonomy.cdm.model.taxon.Taxon;

import eu.etaxonomy.cdm.model.taxon.TaxonNode;

import eu.etaxonomy.taxeditor.editor.EditorUtil;

import eu.etaxonomy.taxeditor.editor.MultiPageTaxonEditor;

import eu.etaxonomy.taxeditor.editor.TaxonEditorInput;

import eu.etaxonomy.taxeditor.editor.l10n.Messages;

import eu.etaxonomy.taxeditor.editor.name.operation.MoveSynonymToAnotherAcceptedTaxonOperation;

import eu.etaxonomy.taxeditor.model.AbstractUtility;

import eu.etaxonomy.taxeditor.model.MessagingUtils;

import eu.etaxonomy.taxeditor.operation.IPostOperationEnabled;

import eu.etaxonomy.taxeditor.ui.dialog.selection.TaxonNodeSelectionDialog;

public class MoveSynonymToAnotherAcceptedTaxonHandler extends AbstractHandler implements IPostOperationEnabled {

	private static final Logger logger = Logger

	.getLogger(MoveSynonymToAnotherAcceptedTaxonHandler.class);

	private MultiPageTaxonEditor editor;

	@Override

	public Object execute(ExecutionEvent event) throws ExecutionException {

		editor =  (MultiPageTaxonEditor) HandlerUtil.getActiveEditor(event);

		Shell shell = HandlerUtil.getActiveShell(event);

		IEditorInput input = editor.getEditorInput();

		// Get synonym from selection before possible save dialog

		// because the selection will be null if save dialog is shown

		StructuredSelection selection = (StructuredSelection) HandlerUtil.getCurrentSelection(event);

		if (!EditorUtil.forceUserSave(editor, shell)) {

			return null;

		}

		if (!(input instanceof TaxonEditorInput)) {

			logger.error("Editor input is not TaxonEditorInput"); //$NON-NLS-1$

			return null;

		}

		if (selection==null || !(selection.getFirstElement() instanceof Synonym)) {

		    MessagingUtils.warningDialog(Messages.MoveSynonymToAnotherAcceptedTaxonHandler_NO_SELECTION, this, Messages.MoveSynonymToAnotherAcceptedTaxonHandler_NO_SELECTION_MESSAGE);

			logger.error("Selection does not contain a Synonym"); //$NON-NLS-1$

			return null;

		}

		Synonym synonym = (Synonym) selection.getFirstElement();

		Taxon oldParent = ((TaxonEditorInput)input).getTaxon();

		List<UUID> excludeTaxa = new ArrayList<UUID>();

		excludeTaxa.add(oldParent.getUuid());

		TaxonNode newParentNode = TaxonNodeSelectionDialog.select(HandlerUtil.getActiveShell(event), editor.getConversationHolder(), Messages.MoveSynonymToAnotherAcceptedTaxonHandler_SELECT_ACC_TAXON, excludeTaxa,  ((TaxonEditorInput)input).getTaxonNode(), ((TaxonEditorInput)input).getTaxonNode().getClassification());

		if(newParentNode!=null){

		   MoveSynonymToAnotherAcceptedTaxonOperation operation = new MoveSynonymToAnotherAcceptedTaxonOperation(Messages.MoveSynonymToAnotherAcceptedTaxonHandler_CHANGE_ACC_TAXON, EditorUtil.getUndoContext(),

		            oldParent.getUuid(), synonym.getUuid(), newParentNode.getTaxon(), editor);

		    AbstractUtility.executeOperation(operation);

		}

		return null;

	}

	@Override

	public boolean postOperation(CdmBase objectAffectedByOperation) {

		// TODO Auto-generated method stub

		return false;

	}

	@Override

	public boolean onComplete() {

		// TODO Auto-generated method stub

		return false;

	}

}