Edit

import org.apache.commons.lang.StringUtils;

import org.eclipse.swt.SWT;

import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

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

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

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

import eu.etaxonomy.taxeditor.preference.AbcdImportProvider;

import eu.etaxonomy.taxeditor.preference.ListComponent;

import eu.etaxonomy.taxeditor.store.CdmStore;

    @Override

    protected Control createContents(Composite parent) {

        final Composite composite = new Composite(parent, SWT.NULL);

        GridLayout gridLayout = new GridLayout();

        composite.setLayout(gridLayout);

        //gridLayout.horizontalSpacing= 5;

        //gridLayout.makeColumnsEqualWidth = true;

        composite.setLayout(gridLayout);

        biocaseProviderList = new ListComponent(composite, SWT.SCROLL_LINE,true, this);

        setApply(true);

        return composite;

    }

            providerList = biocaseProviderList.createAllProviderString();

            CdmPreference pref = CdmPreference.NewTaxEditorInstance(PreferencePredicate.BioCaseProvider, providerList);

            ICdmRepository controller = CdmStore.getCurrentApplicationConfiguration();

            if (controller == null){

    public static String Preference_Use_Default;

AbcdImportPreference_allow_override_tooltip=Use local preference for ABCD import configurator.

AbcdImportProvider_description=Configure the default list of biocase provider for the specimen search

AvailableAreaVocabulariesPage_PAGE_DESCRIPTION=Select vocabularies to select the available areas from.

AvailableAreaVocabulariesPage_PAGE_TITLE=Select Vocabularies for %s

AvailableDistributionPage_CHECK_MESSAGE=Please check at least one item

AbcdImportPreference_override_tooltip=Die lokale Pr?ferenzen f?r den ABCD Import Konfigurator sollen verwendet werden.

AbcdImportProvider_description=Konfiguration einer Liste von Biocase Providern f?r die Specimen Suche

AvailableAreaVocabulariesPage_PAGE_DESCRIPTION=Auswahl der Vokabulare, aus denen die Gebiete f?r %s ausgew?hlt werden sollen.

AvailableAreaVocabulariesPage_PAGE_TITLE=Vokabular f?r %s ausw?hlen

AvailableDistributionPage_CHECK_MESSAGE=Bitte w?hlen Sie mindestens einen Eintrag aus

package eu.etaxonomy.taxeditor.preference;

import org.eclipse.swt.SWT;

import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

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

import eu.etaxonomy.taxeditor.preference.menu.CdmPreferencePage;

/**

public class AbcdImportProvider extends CdmPreferencePage implements IE4PreferencePage{

    protected ListComponent biocaseProviderList;

    @Override

    protected Control createContents(Composite parent) {

        final Composite composite = new Composite(parent, SWT.NULL);

        GridLayout gridLayout = new GridLayout();

        composite.setLayout(gridLayout);

        composite.setLayout(gridLayout);

        biocaseProviderList = new ListComponent(composite, SWT.SCROLL_LINE,false, this);

        setApply(true);

        return composite;

    }

        commandHandlerString = "eu.etaxonomy.taxeditor.store.open.OpenDistributionEditorWizardHandler";

        commandHandlerStringStatus = "eu.etaxonomy.taxeditor.store.open.OpenDistributionStatusWizardHandler";

    }

    /**

            }

        }

        prefStatus = null;

        prefAreaVoc = null;

        refresh();

    }

    @Override

        if (!isApply()){

            return true;

        }

        if (prefStatus == null){

            PreferencesUtil.removeFromDB(prefsToDelete);

        }

        if (prefAreaVoc == null){

            PreferencesUtil.removeFromDB(prefsToDelete);

        }

        List<CdmPreference> toDelete = new ArrayList<>();

    @Optional

    public void updateView(@UIEventTopic(WorkbenchEventConstants.REFRESH_DATASOURCE)boolean refresh){

        if(refresh){

            refresh();

        }

    }

        if (event != null

                && PreferencesUtil.PREFERRED_TERMS_CHANGE.equals(event

                        .getProperty())) {

            refresh();

        }

    }

     *

     */

    private void refresh() {

        table.removeAll();

        }

        table.redraw();

        table.pack();

import org.apache.commons.lang.StringUtils;

import org.eclipse.jface.resource.JFaceResources;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.ModifyEvent;

import org.eclipse.swt.events.ModifyListener;

import org.eclipse.swt.events.MouseEvent;

    private static final String addString = Messages.ListComponent_ADD_PROVIDER;

    private static final String removeString = Messages.ListComponent_REMOVE_PROVIDER;

    private static final String noProvider = Messages.ListComponent_NO_PROVIDER_AVAILABLE;

    private Button removeButton;

    private Text providerURI;

    protected Label labelException;

    boolean isAdmin = false;

    CdmPreferencePage preferencePage;

    public ListComponent(Composite parent, int style, boolean isAdmin, CdmPreferencePage parentPage) {

        this.isAdmin= isAdmin;

        this.preferencePage = parentPage;

        list = new List(parent, SWT.BORDER |  SWT.V_SCROLL);

        GridData gridData = new GridData(SWT.FILL, SWT.CENTER, true, true, 2, 3);

        gridData.grabExcessHorizontalSpace = true;

        Rectangle clientArea = parent.getShell().getClientArea ();

        list.setBounds (clientArea.x, clientArea.y, 50, 500);

        String allProviderString = ""; //$NON-NLS-1$

        if (!isAdmin && (providerListPreference != null && providerListPreference.isAllowOverride())){

            allProviderString = PreferencesUtil.getStringValue(PreferencePredicate.BioCaseProvider.getKey(), true);

        }else{

            if (providerListPreference != null){

                allProviderString  = providerListPreference.getValue();

            }

        }

        //the string is structured like this: http://ww3.bgbm.org/biocase/pywrapper.cgi?dsa=DNA_Bank;http:...;

        String[] providerArray = allProviderString.split(";"); //$NON-NLS-1$

        for (String providerString : providerArray){

            if (!StringUtils.isBlank(providerString)){

                list.add(providerString);

            }

        }

        if (list.getItemCount() == 0){

            list.add(noProvider);

        }

            //there's a valid selection

            //so go ahead and remove whatever's selected.

            int index = list.getSelectionIndex();

            list.remove(index);

            int size = list.getItemCount();

            if (size == 0) { //Nothing's left, disable removing.

        String allProviderString = null;

        boolean first = true;

        for (String item: list.getItems()){

                //do nothing

            }else if (first || allProviderString == null || allProviderString == ""){ //$NON-NLS-1$

                allProviderString = item.trim();