EDIT

    public static String MoveSynonymToAcceptedHandler_Select_Sec_Reference_Handling_message;

ChangeSynonymToAcceptedHandler_Select_Sec_Reference_Handling_title=Select secundum reference

ChangeSynonymToAcceptedHandler_Select_Sec_Reference_Handling_message=The secundum reference of the selected parent is different to the secundum of the synonym. Please select which secundum should be used for the accepted taxon.

ChangeSynonymToAcceptedHandler_Different_Publish_Flag=The selected parent taxon and the new taxon have different pubish flags. Maybe one of them should be adapted.

MoveSynonymToAcceptedHandler_Select_Sec_Reference_Handling_message= Secundum reference of synonym and new accepted taxon are different. Please select the reference used as secundum.

ChangeSynonymToAcceptedHandler_Select_Sec_Reference_Parent=Eltern Sekundum

ChangeSynonymToAcceptedHandler_Different_Publish_Flag=Das gew?hlte Elterntaxon und das neue Taxon haben unterschiedliche Publikationsstatus. Eventuell sollten sie angepasst werden.

MoveSynonymToAcceptedHandler_Select_Sec_Reference_Handling_message=Die Sekundum Referenz des Synonyms und des neuen akzeptierten Taxons unterscheiden sich, bitte w?hlen Sie, welche Referenz verwendet werden soll.

import eu.etaxonomy.cdm.model.metadata.SecReferenceHandlingEnum;

import eu.etaxonomy.cdm.model.reference.Reference;

import eu.etaxonomy.taxeditor.preference.PreferencesUtil;

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

		SecReferenceHandlingEnum secHandling = PreferencesUtil.getSecReferenceHandlingPreference();

        UUID newSecUuid = null;

        Reference synSecRef = synonym.getSec();

        Reference parentSecRef = newParentNode.getTaxon() != null? newParentNode.getTaxon().getSec():null;

        if ((synSecRef != parentSecRef && secHandling.equals(SecReferenceHandlingEnum.KeepWhenSame) )|| secHandling.equals(SecReferenceHandlingEnum.WarningSelect)){

            if ((parentSecRef != synSecRef && secHandling.equals(SecReferenceHandlingEnum.KeepWhenSame) )|| secHandling.equals(SecReferenceHandlingEnum.WarningSelect)){

                int result = MessagingUtils.confirmDialog(Messages.ChangeSynonymToAcceptedHandler_Select_Sec_Reference_Handling_title, Messages.MoveSynonymToAcceptedHandler_Select_Sec_Reference_Handling_message,

                        new String[]{Messages.ChangeSynonymToAcceptedHandler_Select_Sec_Reference_Keep, Messages.ChangeSynonymToAcceptedHandler_Select_Sec_Reference_Parent, Messages.ChangeSynonymToAcceptedHandler_Select_Sec_Reference_Select});

                if (result == 2){

                    Reference sec = ReferenceSelectionDialog.select(shell, null);

                    newSecUuid = sec != null? sec.getUuid(): null;

                }else if (result == 1){

                    newSecUuid = parentSecRef != null? parentSecRef.getUuid(): null;

                }else if (result == 0){

                    newSecUuid = synSecRef != null? synSecRef.getUuid(): null;

                }else{

                    return ;

                }

            }

        }