EDIT

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

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.core.commands.common.NotDefinedException;

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

import org.eclipse.jface.dialogs.MessageDialog;

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.name.TaxonNameBase;

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.name.operation.MoveSynonymToAnotherAcceptedTaxonOperation;

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();

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

			return null;

		}

		if (!(input instanceof TaxonEditorInput)) {

			logger.error("Editor input is not TaxonEditorInput");

			return null;

		}

		// Get synonym from selection

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

		if (!(selection.getFirstElement() instanceof Synonym)) {

			logger.error("Selection does not contain a Synonym");

			return null;

		}

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

		TaxonNode newParentNode = TaxonNodeSelectionDialog.select(HandlerUtil.getActiveShell(event), editor.getConversationHolder(), "Select new accepted taxon", null, null, null);

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

			MoveSynonymToAnotherAcceptedTaxonOperation operation = new MoveSynonymToAnotherAcceptedTaxonOperation("Change accepted Taxon of Synonym", EditorUtil.getUndoContext(),

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

			EditorUtil.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;

	}

}