EDIT

package eu.etaxonomy.taxeditor.editor.view.checklist.e4.handler;

import java.util.List;

import javax.inject.Inject;

import javax.inject.Named;

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

import org.eclipse.e4.core.services.log.Logger;

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

import org.eclipse.e4.ui.model.application.ui.menu.MHandledMenuItem;

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

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

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.swt.widgets.Shell;

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

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

import eu.etaxonomy.cdm.model.permission.Operation;

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

import eu.etaxonomy.cdm.persistence.dto.UuidAndTitleCache;

import eu.etaxonomy.taxeditor.editor.AppModelId;

import eu.etaxonomy.taxeditor.editor.EditorUtil;

import eu.etaxonomy.taxeditor.editor.l10n.Messages;

import eu.etaxonomy.taxeditor.handler.defaultHandler.e4.DefaultOpenSetBaseHandler;

import eu.etaxonomy.taxeditor.preference.PreferencesUtil;

import eu.etaxonomy.taxeditor.security.RequiredPermissions;

import eu.etaxonomy.taxeditor.store.CdmStore;

public class OpenChecklistEditorHandlerE4 extends DefaultOpenSetBaseHandler<List<UuidAndTitleCache>> {

    @Inject

    private Logger logger;

    private static final String COULD_NOT_OPEN_DISTRIBUTION_EDITOR_THE_HIERARCHY_IS_CORRUPTED = Messages.OpenChecklistEditorHandler_COULD_NOT_OPEN_MESSAGE;

    private static final String COULD_NOT_OPEN_DISTRIBUTION_EDITOR = Messages.OpenChecklistEditorHandler_COULD_NOT_OPEN_TITLE;

	@Override

	protected void open(List<UuidAndTitleCache> entities, Shell shell, EPartService partService) {

	    EditorUtil.openDistributionEditor(entities, modelService, partService, application);

	}

    /**

     * {@inheritDoc}

     */

    @CanExecute

    @Override

    public boolean canExecute(MHandledMenuItem menuItem,

            @Named(IServiceConstants.ACTIVE_PART) MPart activePart) {

        Distribution instance = Distribution.NewInstance();

        boolean hasDescriptionPermission = CdmStore.currentAuthentiationHasPermission(instance, Operation.ALL);

        if (!hasDescriptionPermission){

            return false;

        }

        return PreferencesUtil.getBooleanValue(PreferencePredicate.DistributionEditorActivated.getKey());

        //check whether the user has subtree rights

    //    CdmStore.getCurrentAuthentiation().getAuthorities()

     //   boolean  hasPermission =  ((TaxonNode)entity).hasChildNodes() ? checkPermission(((TaxonNode)entity).getChildNodes(), false) || CdmStore.currentAuthentiationHasPermission(((TaxonNode) entity), RequiredPermissions.TAXONNODE_EDIT):CdmStore.currentAuthentiationHasPermission(((TaxonNode) entity), RequiredPermissions.TAXONNODE_EDIT);

    //    return hasPermission &&  PreferencesUtil.getBooleanValue(PreferencePredicate.DistributionEditorActivated.getKey());

    }

    @Override

    protected String getPartId() {

        return AppModelId.PARTDESCRIPTOR_EU_ETAXONOMY_TAXEDITOR_EDITOR_VIEW_CHECKLIST_E4_DISTRIBUTIONEDITORPART;

    }

    private boolean checkPermission(List<TaxonNode> nodes, boolean result){

        for (TaxonNode node:nodes){

            if (node.hasChildNodes() && !result){

                result = result ||checkPermission(node.getChildNodes(), result);

            }

            result = result || CdmStore.currentAuthentiationHasPermission(node, RequiredPermissions.TAXONNODE_EDIT);

            if (result){

                return result;

            }

        }

        return result;

    }

    @Override

    protected boolean canExecute(IStructuredSelection entity) {

        // TODO Auto-generated method stub

        return true;

    }

}