EDIT

package eu.etaxonomy.taxeditor.editor.handler;

import org.eclipse.core.commands.AbstractHandler;

import org.eclipse.core.commands.ExecutionEvent;

import org.eclipse.core.commands.ExecutionException;

import org.eclipse.e4.ui.model.application.ui.basic.MPart;

import org.eclipse.e4.ui.workbench.modeling.EPartService;

import org.eclipse.e4.ui.workbench.modeling.EPartService.PartState;

import eu.etaxonomy.taxeditor.editor.AppModelId;

import eu.etaxonomy.taxeditor.editor.view.derivate.DerivateView;

import eu.etaxonomy.taxeditor.editor.view.derivate.DerivateViewEditorInput;

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

public class OpenDerivateViewHandler extends AbstractHandler {

    @Override

    public Object execute(ExecutionEvent event) throws ExecutionException {

        EPartService partService = TaxeditorStorePlugin.getDefault().getWorkbench().getActiveWorkbenchWindow().getService(EPartService.class);

        MPart part = partService.createPart(AppModelId.PARTDESCRIPTOR_EU_ETAXONOMY_TAXEDITOR_EDITOR_VIEW_DERIVATE_DERIVATEVIEW);

        part = partService.showPart(part, PartState.ACTIVATE);

        DerivateView derivateView = (DerivateView) part.getObject();

        derivateView.init(new DerivateViewEditorInput());

        return null;

    }

}