EDIT

      <handlers xmi:id="_3wq0cGceEee0qLTtA2ZpVQ" elementId="eu.etaxonomy.taxeditor.featuretree.e4.handler.AddFeatureHandler" contributionURI="bundleclass://eu.etaxonomy.taxeditor.store/eu.etaxonomy.taxeditor.featuretree.e4.handler.AddFeatureHandler" command="_oftL0GceEee0qLTtA2ZpVQ"/>

      <handlers xmi:id="_rVEdIGcjEee0qLTtA2ZpVQ" elementId="eu.etaxonomy.taxeditor.featuretree.e4.handler.RemoveFeatureHandler" contributionURI="bundleclass://eu.etaxonomy.taxeditor.store/eu.etaxonomy.taxeditor.featuretree.e4.handler.RemoveFeatureHandler" command="_fNBtQGcjEee0qLTtA2ZpVQ"/>

      <handlers xmi:id="_VSc2UGcqEee0qLTtA2ZpVQ" elementId="eu.etaxonomy.taxeditor.featuretree.e4.handler.FeatureTreeExportHandler" contributionURI="bundleclass://eu.etaxonomy.taxeditor.store/eu.etaxonomy.taxeditor.featuretree.e4.handler.FeatureTreeExportHandler" command="_I_yx4GcqEee0qLTtA2ZpVQ"/>

      <menus xsi:type="menu:PopupMenu" xmi:id="__Jwh4GceEee0qLTtA2ZpVQ" elementId="eu.etaxonomy.taxeditor.store.popupmenu.featureTreeEditor">

        <children xsi:type="menu:HandledMenuItem" xmi:id="_Beb6QGcfEee0qLTtA2ZpVQ" elementId="eu.etaxonomy.taxeditor.store.handledmenuitem.removeFeature" label="Remove Feature" command="_fNBtQGcjEee0qLTtA2ZpVQ"/>

        <children xsi:type="menu:HandledMenuItem" xmi:id="_eWBz0GcjEee0qLTtA2ZpVQ" elementId="eu.etaxonomy.taxeditor.store.handledmenuitem.addFeature" label="Add Feature" command="_oftL0GceEee0qLTtA2ZpVQ"/>

        <children xsi:type="menu:HandledMenuItem" xmi:id="_7vaEcGcqEee0qLTtA2ZpVQ" elementId="eu.etaxonomy.taxeditor.store.handledmenuitem.exportFeatureTree" label="Export Feature Tree" command="_I_yx4GcqEee0qLTtA2ZpVQ">

          <visibleWhen xsi:type="ui:CoreExpression" xmi:id="_-91IQGcqEee0qLTtA2ZpVQ" coreExpressionId="isShowExperimentalFeatures"/>

        </children>

      </menus>

  <fragments xsi:type="fragment:StringModelFragment" xmi:id="_mPdAcGceEee0qLTtA2ZpVQ" featurename="commands" parentElementId="org.eclipse.e4.legacy.ide.application">

    <elements xsi:type="commands:Command" xmi:id="_oftL0GceEee0qLTtA2ZpVQ" elementId="eu.etaxonomy.taxeditor.store.command.featureTree.addFeature" commandName="Add Feature" description="Add a feature to the feature tree"/>

    <elements xsi:type="commands:Command" xmi:id="_fNBtQGcjEee0qLTtA2ZpVQ" elementId="eu.etaxonomy.taxeditor.store.command.featureTree.removeFeature" commandName="Remove Feature" description="Removes a feature from the feature tree"/>

    <elements xsi:type="commands:Command" xmi:id="_I_yx4GcqEee0qLTtA2ZpVQ" elementId="eu.etaxonomy.taxeditor.store.command.featureTree.exportTree" commandName="Export Feature Tree"/>

  </fragments>

import org.eclipse.e4.ui.services.EMenuService;

import org.eclipse.jface.viewers.TreeViewer;

    public void createControl(Composite parent, EMenuService menuService){

        //create context menu

        menuService.registerContextMenu(composite.getViewer().getControl(), "eu.etaxonomy.taxeditor.store.popupmenu.featureTreeEditor");

	public void refresh(){

	    composite.getViewer().refresh();

	}

	public TreeViewer getViewer(){

	    return composite.getViewer();

	}

/**

* Copyright (C) 2017 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.taxeditor.featuretree.e4.handler;

import java.util.Collection;

import javax.inject.Named;

import org.eclipse.core.runtime.IStatus;

import org.eclipse.e4.core.di.annotations.CanExecute;

import org.eclipse.e4.core.di.annotations.Execute;

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

import org.eclipse.e4.ui.services.IServiceConstants;

import org.eclipse.jface.wizard.WizardDialog;

import org.eclipse.swt.widgets.Shell;

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

import eu.etaxonomy.cdm.model.description.Feature;

import eu.etaxonomy.cdm.model.description.FeatureNode;

import eu.etaxonomy.cdm.model.description.FeatureTree;

import eu.etaxonomy.taxeditor.featuretree.AvailableFeaturesWizard;

import eu.etaxonomy.taxeditor.featuretree.e4.FeatureTreeEditor;

import eu.etaxonomy.taxeditor.store.CdmStore;

/**

 * @author pplitzner

 * @since Jul 12, 2017

 *

 */

public class AddFeatureHandler {

    @Execute

    public void execute(@Named(IServiceConstants.ACTIVE_SHELL) Shell shell,

            @Named(IServiceConstants.ACTIVE_PART)MPart thisPart) {

        FeatureTreeEditor editor = ((FeatureTreeEditor) thisPart.getObject());

        AvailableFeaturesWizard wizard = new AvailableFeaturesWizard();

        WizardDialog dialog = new WizardDialog(shell, wizard);

        if (dialog.open() == IStatus.OK) {

            FeatureNode parent = ((FeatureTree) editor.getViewer().getInput()).getRoot();

            Collection<Feature> additionalFeatures = wizard.getAdditionalFeatures();

            for (Feature feature : additionalFeatures) {

                if (!editor.getSelectedFeatureTree().getDistinctFeatures().contains(feature)) {

                    CdmStore.getService(IFeatureNodeService.class).addChildFeatureNode(parent.getUuid(), feature.getUuid());

                }

            }

            thisPart.setDirty(true);

            editor.getViewer().refresh();

            editor.getViewer().expandToLevel(parent, 1);

        }

    }

    @CanExecute

    public boolean canExecute(@Named(IServiceConstants.ACTIVE_PART)MPart thisPart) {

        return thisPart.getObject() instanceof FeatureTreeEditor && ((FeatureTreeEditor) thisPart.getObject()).getSelectedFeatureTree()!=null;

    }

}

/**

* Copyright (C) 2017 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.taxeditor.featuretree.e4.handler;

import java.io.File;

import javax.inject.Named;

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

import org.eclipse.e4.core.di.annotations.CanExecute;

import org.eclipse.e4.core.di.annotations.Execute;

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

import org.eclipse.e4.ui.services.IServiceConstants;

import org.eclipse.swt.widgets.DirectoryDialog;

import org.eclipse.swt.widgets.Shell;

import org.eclipse.ui.progress.IProgressConstants;

import eu.etaxonomy.cdm.io.descriptive.owl.out.OwlExportConfigurator;

import eu.etaxonomy.cdm.model.description.FeatureTree;

import eu.etaxonomy.taxeditor.featuretree.e4.FeatureTreeEditor;

import eu.etaxonomy.taxeditor.model.MessagingUtils;

import eu.etaxonomy.taxeditor.store.CdmStore;

/**

 * @author pplitzner

 * @since Jul 12, 2017

 *

 */

public class FeatureTreeExportHandler {

    @Execute

    public void execute(@Named(IServiceConstants.ACTIVE_SHELL) Shell shell,

            @Named(IServiceConstants.ACTIVE_PART)MPart thisPart){

        FeatureTreeEditor editor = ((FeatureTreeEditor) thisPart.getObject());

        FeatureTree selectedFeatureTree = editor.getSelectedFeatureTree();

        if(selectedFeatureTree==null){

            MessagingUtils.informationDialog("Export not possible", "There is no feature tree selected.");

            return;

        }

        DirectoryDialog dialog = new DirectoryDialog(shell);

        String directoryString = dialog.open();

        if(directoryString!=null){

            // create job

            Job job = CdmStore.getExportManager().createIOServiceJob(OwlExportConfigurator.NewInstance(null, null, selectedFeatureTree), new File(directoryString+"/owl.owl"));

            // configure the job

            job.setProperty(IProgressConstants.KEEP_PROPERTY, true);

            job.setUser(true);

            // schedule job

            job.schedule();

        }

    }

    @CanExecute

    public boolean canExecute(@Named(IServiceConstants.ACTIVE_PART)MPart thisPart){

        return thisPart.getObject() instanceof FeatureTreeEditor && ((FeatureTreeEditor) thisPart.getObject()).getSelectedFeatureTree()!=null;

    }

}

/**

* Copyright (C) 2017 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.taxeditor.featuretree.e4.handler;

import javax.inject.Named;

import org.eclipse.e4.core.di.annotations.CanExecute;

import org.eclipse.e4.core.di.annotations.Execute;

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

import org.eclipse.e4.ui.services.IServiceConstants;

import org.eclipse.jface.viewers.IStructuredSelection;

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

import eu.etaxonomy.cdm.api.service.config.FeatureNodeDeletionConfigurator;

import eu.etaxonomy.cdm.model.description.FeatureNode;

import eu.etaxonomy.taxeditor.featuretree.e4.FeatureTreeEditor;

import eu.etaxonomy.taxeditor.store.CdmStore;

/**

 * @author pplitzner

 * @since Jul 12, 2017

 *

 */

public class RemoveFeatureHandler {

    @Execute

    public void execute(@Named(IServiceConstants.ACTIVE_PART)MPart thisPart){

        FeatureTreeEditor editor = (FeatureTreeEditor) thisPart.getObject();

        IStructuredSelection selection = (IStructuredSelection) editor.getViewer().getSelection();

        for (Object selectedObject : selection.toArray()) {

            FeatureNode featureNode = (FeatureNode) selectedObject;

            CdmStore.getService(IFeatureNodeService.class).deleteFeatureNode(featureNode.getUuid(), new FeatureNodeDeletionConfigurator());

        }

        thisPart.setDirty(true);

        editor.refresh();

    }

    @CanExecute

    public boolean canExecute(@Named(IServiceConstants.ACTIVE_SELECTION)IStructuredSelection selection,

            @Named(IServiceConstants.ACTIVE_PART)MPart thisPart){

        return thisPart.getObject() instanceof FeatureTreeEditor && selection!=null && !selection.isEmpty();

    }

}