EDIT

import java.util.Map;

import org.apache.log4j.Logger;

import org.eclipse.ui.PartInitException;

import eu.etaxonomy.cdm.model.occurrence.SpecimenOrObservationBase;

    private final Logger logger = Logger.getLogger(EditorCdmViewer.class);

    @Override

        try {

            if(viewerClass.equals(MultiPageTaxonEditor.class)){

                if(input instanceof TaxonBase){

        }

    }

    @Override

    public Map<Class<?>, String> getViewerClasses(Object input) {

        Map<Class<?>, String> viewerNameMap = new HashMap<Class<?>, String>();

import java.util.Map;

import org.apache.log4j.Logger;

import org.eclipse.jface.wizard.WizardDialog;

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

import eu.etaxonomy.taxeditor.newWizard.NewClassificationWizard;

    @SuppressWarnings("unused")

    private final Logger logger = Logger.getLogger(NavigationCdmViewer.class);

    @Override

        if(viewerClass.equals(NewClassificationWizard.class)){

            if(input instanceof Classification){

                Classification classification = (Classification)input;

                NewClassificationWizard classificationWizard = new NewClassificationWizard();

                classificationWizard.init(null, null);

                classificationWizard.setEntity(classification);

                dialog.open();

            }

        }

    }

    @Override

    public Map<Class<?>, String> getViewerClasses(Object input) {

        Map<Class<?>, String> viewerNameMap = new HashMap<Class<?>, String>();

import eu.etaxonomy.taxeditor.view.CdmViewerChooser;

public class OpenHandler extends AbstractHandler {

    @Override

        if(currentSelection instanceof IStructuredSelection){

            Object firstElement = ((IStructuredSelection) currentSelection).getFirstElement();

            CdmViewerChooser viewerChooser = new CdmViewerChooser(HandlerUtil.getActiveShell(event));

        }

        return null;

    }

import java.util.Map;

import java.util.Map.Entry;

import org.eclipse.core.runtime.CoreException;

import org.eclipse.core.runtime.IConfigurationElement;

import org.eclipse.core.runtime.IExtensionRegistry;

import eu.etaxonomy.taxeditor.store.internal.TaxeditorStorePlugin;

/**

 *

 * @author pplitzner

 * @date Feb 23, 2015

    private Object input;

    private Map<Entry<Class<?>, String>, ICdmViewer> nameViewerMap;

    public CdmViewerChooser(Shell parentShell) {

        this(parentShell, SWT.RESIZE | SWT.ON_TOP, true, false, false, false, false, "Open in ...",

                titleText, infoText);

    }

        IExtensionRegistry reg = Platform.getExtensionRegistry();

        IConfigurationElement[] extensions = reg

                MessagingUtils.error(CdmViewerChooser.class, "Could not load cdmViewer extension", e);

            }

        }

        //if only one editor is available then open it

        if(nameViewerMap.size()==1){

            Entry<Class<?>, String> next = nameViewerMap.keySet().iterator().next();

            ICdmViewer cdmViewer = nameViewerMap.get(next);

        }

        else{

            if(nameViewerMap.isEmpty()){

        }

    }

    @Override

    protected Control createDialogArea(Composite parent) {

        TableViewer viewer = new TableViewer(new Table(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.FULL_SELECTION));

        return parent;

    }

    @Override

    public void selectionChanged(SelectionChangedEvent event) {

        ISelection selection = event.getSelection();

            if(nameViewerMap.containsKey(firstElement)){

                Entry<Class<?>, String> entry = (Entry<Class<?>, String>)firstElement;

                ICdmViewer cdmViewer = nameViewerMap.get(entry);

                this.close();

            }

        }

    }

    @Override

    public String getText(Object element) {

        String text = null;

        return text;

    }

    @Override

    public void addListener(ILabelProviderListener listener) {

        // TODO Auto-generated method stub

    }

    @Override

    public void dispose() {

        // TODO Auto-generated method stub

    }

    @Override

    public boolean isLabelProperty(Object element, String property) {

        // TODO Auto-generated method stub

        return false;

    }

    @Override

    public void removeListener(ILabelProviderListener listener) {

        // TODO Auto-generated method stub

    }

    @Override

    public Image getImage(Object element) {

        // TODO Auto-generated method stub

import java.util.Map;

/**

 * Implementors of this interface provide a mapping of input elements to views

public interface ICdmViewer {

    /**

     *

     * @param input

     *            the input for which the viewer classes should be returned

     * Opens the viewer defined by the given viewerClass for the given input.

     * @param input the input for which a viewer should be opened

     * @param viewerClass the qualified class name of the viewer

     */

}