EDIT

import org.eclipse.core.runtime.IProgressMonitor;

import org.eclipse.core.runtime.IStatus;

import org.eclipse.core.runtime.Status;

import org.eclipse.core.runtime.jobs.Job;

import org.eclipse.e4.ui.di.UISynchronize;

    private UISynchronize sync;

    public GfBioTerminologyImportPresenter(GfBioTerminologyImportComposite composite, UISynchronize sync) {

        this.sync = sync;

        if(selectedOntologies.isEmpty() && !MessagingUtils.confirmDialog("Long running operation", "You have not selected any specific ontology. This search may take a long time.\n\nDo you want to continue?")){

        Job searchJob = new Job("Search Ontologies") {

            protected IStatus run(IProgressMonitor monitor) {

                String response = new RequestSearch(searchString, selectedOntologies).request();

                if(response==null){

                    MessagingUtils.informationDialog(NO_CONNECTION_TITLE, NO_CONNECTION_MESSAGE);

                    return Status.CANCEL_STATUS;

                }

                final List<OntologyTermWrapper> wrapperList = new ArrayList<>();

                wrapperList.addAll(TermParser.parse(response));

                if(wrapperList.isEmpty()){

                    MessagingUtils.informationDialog(Messages.GfBioTerminologyImportPresenter_NO_RESULTS_TITLE, Messages.GfBioTerminologyImportPresenter_NO_RESULTS_MESSAGE);

                //sort list

                Collections.sort(wrapperList, new TermWrapperComparator(searchString));

                sync.syncExec(() -> {

                    composite.getTreeTermHierarchy().setInput(wrapperList);

                    composite.getLblResultCount().setText(Integer.toString(wrapperList.size()));

                });

                return Status.OK_STATUS;

            }

        };

       searchJob.schedule();

    }

    private final class TermWrapperComparator implements Comparator<OntologyTermWrapper> {

        private final String searchString;

        public TermWrapperComparator(String searchString) {

            super();

            this.searchString = searchString;

        }

        @Override

        public int compare(OntologyTermWrapper o1, OntologyTermWrapper o2) {

            //remove wildcards from search string

            String trimmedSearch = searchString.replace("*", "");

            String label1 = o1.getLabel();

            String label2 = o2.getLabel();

            //1. search string at the beginning

            if(label1.startsWith(trimmedSearch)){

                if(!label2.startsWith(trimmedSearch)){

                    return -1;

                else{

                    return label1.compareTo(label2);

            }

            else if(label2.startsWith(trimmedSearch)){

                return 1;

            }

            //2. label that contains search string

            if(label1.contains(trimmedSearch)){

                if(!label2.contains(trimmedSearch)){

                    return -1;

            else if(label2.contains(trimmedSearch)){

                return 1;

            }

            return label1.compareTo(label2);

        }