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/**
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* Copyright (C) 2017 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.cdm.vaadin.view.distributionStatus;
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import java.sql.SQLException;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.List;
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import java.util.UUID;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.orm.hibernate5.HibernateSystemException;
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import org.springframework.security.core.GrantedAuthority;
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import org.vaadin.addons.lazyquerycontainer.LazyQueryContainer;
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import com.vaadin.data.Item;
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import com.vaadin.data.Property;
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import com.vaadin.navigator.ViewChangeListener.ViewChangeEvent;
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import com.vaadin.spring.annotation.SpringView;
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import com.vaadin.spring.annotation.ViewScope;
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import com.vaadin.ui.AbsoluteLayout;
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import com.vaadin.ui.Button;
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import com.vaadin.ui.Grid;
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import com.vaadin.ui.Grid.FooterRow;
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import com.vaadin.ui.ListSelect;
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import com.vaadin.ui.Notification;
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import com.vaadin.ui.Notification.Type;
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import com.vaadin.ui.Table;
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import com.vaadin.ui.UI;
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import com.vaadin.ui.VerticalLayout;
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import com.vaadin.ui.Window;
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import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;
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import eu.etaxonomy.cdm.i18n.Messages;
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import eu.etaxonomy.cdm.model.common.CdmBase;
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import eu.etaxonomy.cdm.model.common.Language;
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import eu.etaxonomy.cdm.model.common.Representation;
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import eu.etaxonomy.cdm.model.description.DescriptionElementBase;
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import eu.etaxonomy.cdm.model.description.PresenceAbsenceTerm;
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import eu.etaxonomy.cdm.model.taxon.Taxon;
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import eu.etaxonomy.cdm.vaadin.component.distributionStatus.AreaAndTaxonSettingsConfigWindow;
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import eu.etaxonomy.cdm.vaadin.component.distributionStatus.DetailWindow;
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import eu.etaxonomy.cdm.vaadin.component.distributionStatus.DistributionStatusSettingsConfigWindow;
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import eu.etaxonomy.cdm.vaadin.component.distributionStatus.DistributionToolbar;
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import eu.etaxonomy.cdm.vaadin.component.distributionStatus.HelpWindow;
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import eu.etaxonomy.cdm.vaadin.container.CdmSQLContainer;
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import eu.etaxonomy.cdm.vaadin.event.error.DelegatingErrorHandler;
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import eu.etaxonomy.cdm.vaadin.event.error.HibernateSystemErrorHandler;
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import eu.etaxonomy.cdm.vaadin.security.AccessRestrictedView;
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import eu.etaxonomy.cdm.vaadin.util.CdmQueryFactory;
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import eu.etaxonomy.cdm.vaadin.util.CdmSpringContextHelper;
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import eu.etaxonomy.cdm.vaadin.util.DistributionEditorUtil;
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import eu.etaxonomy.cdm.vaadin.view.AbstractPageView;
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/**
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 * @author freimeier
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 * @since 18.10.2017
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 *
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 */
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@ViewScope
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@SpringView(name=DistributionTableViewBean.NAME)
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public class DistributionTableViewBean
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            extends AbstractPageView<DistributionTablePresenter>
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            implements IDistributionTableView, AccessRestrictedView {
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	private static final long serialVersionUID = 1L;
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    public static final String NAME = "distGrid"; //$NON-NLS-1$
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    @Autowired
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    private DistributionToolbar toolbar;
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	private Table table;
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	private Grid grid;
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	private FooterRow footerRow;
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    private CdmSQLContainer container;
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    private LazyQueryContainer gridcontainer;
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	private AreaAndTaxonSettingsConfigWindow areaAndTaxonConfigWindow;;
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	private DistributionStatusSettingsConfigWindow distributionStatusConfigWindow;
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	private HelpWindow helpWindow;
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	public DistributionTableViewBean() {
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		super();
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	}
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	private AbsoluteLayout initLayout() {
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		AbsoluteLayout mainLayout = new AbsoluteLayout();
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		mainLayout.setImmediate(false);
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		mainLayout.setWidth("100%"); //$NON-NLS-1$
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		mainLayout.setHeight("100%"); //$NON-NLS-1$
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		setWidth("100.0%"); //$NON-NLS-1$
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		setHeight("100.0%"); //$NON-NLS-1$
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		//Horizontal Toolbar
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		mainLayout.addComponent(toolbar, "top:0.0px;right:0.0px;"); //$NON-NLS-1$
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		// table + formatting
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		table = new Table(){
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			private static final long serialVersionUID = -5148756917468804385L;
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			@Override
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			protected String formatPropertyValue(Object rowId, Object colId, Property<?> property) {
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				String formattedValue = null;
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				PresenceAbsenceTerm presenceAbsenceTerm = null;
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				Object value = property.getValue();
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				if(value instanceof String){
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//					presenceAbsenceTerm = TermCacher.getInstance().getPresenceAbsenceTerm((String) value);
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                    try {
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                        presenceAbsenceTerm = (PresenceAbsenceTerm)CdmSpringContextHelper.getTermService().load(UUID.fromString((String)value));
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                    }catch(IllegalArgumentException|ClassCastException e) {
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                        // Not a PresenceAbsenceTerm Column
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                    }
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				}
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				if(presenceAbsenceTerm != null){
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					Representation representation = presenceAbsenceTerm.getRepresentation(Language.DEFAULT());
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					if(representation!=null){
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						if(DistributionEditorUtil.isAbbreviatedLabels()){
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							formattedValue = representation.getAbbreviatedLabel();
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						}
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						else{
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							formattedValue = representation.getLabel();
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						}
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					}
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					if(formattedValue==null){
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						formattedValue = presenceAbsenceTerm.getTitleCache();
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					}
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					return formattedValue;
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				}
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				return super.formatPropertyValue(rowId, colId, property);
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			}
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		};
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		table.setImmediate(false);
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		table.setWidth("100.0%");
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		table.setHeight("100.0%");
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        table.setColumnReorderingAllowed(true);
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        table.setSortEnabled(false);
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        table.setColumnCollapsingAllowed(true);
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        table.setSelectable(true);
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        table.setPageLength(20);
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        table.setFooterVisible(true);
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        table.setCacheRate(20);
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		table.addItemClickListener(event -> {
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            if(!(event.getPropertyId().toString().equalsIgnoreCase(CdmQueryFactory.TAXON_COLUMN))
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            		&& !(event.getPropertyId().toString().equalsIgnoreCase(CdmQueryFactory.RANK_COLUMN))
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            		// TODO: HACK FOR RL 2017, REMOVE AS SOON AS POSSIBLE
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            		&& !(event.getPropertyId().toString().equalsIgnoreCase("DE"))
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            		&& !(event.getPropertyId().toString().equalsIgnoreCase("Deutschland"))){
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                final Item item = event.getItem();
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                Property<?> itemProperty = item.getItemProperty("uuid");
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                UUID uuid = UUID.fromString(itemProperty.getValue().toString());
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                final Taxon taxon = CdmBase.deproxy(CdmSpringContextHelper.getTaxonService()
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                		.load(uuid,Arrays.asList("descriptions.descriptionElements","name.taxonBases","updatedBy")), Taxon.class);
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                final String areaID = (String)event.getPropertyId();
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                PresenceAbsenceTerm presenceAbsenceTerm = null;
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                Object statusValue = item.getItemProperty(areaID).getValue();
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                if(statusValue instanceof String){
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//                	presenceAbsenceTerm = TermCacher.getInstance().getPresenceAbsenceTerm((String) statusValue);
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                    try {
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                        presenceAbsenceTerm = (PresenceAbsenceTerm)CdmSpringContextHelper.getTermService().load(UUID.fromString((String)statusValue));
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                    }catch(IllegalArgumentException|ClassCastException e) {
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                        // Not a PresenceAbsenceTerm Column
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                    }
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                }
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                //popup window
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                final Window popup = new Window(Messages.getLocalizedString(Messages.DistributionTableViewBean_CHOOSE_DISTRIBUTION_STATUS));
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                DelegatingErrorHandler errorHandler = new DelegatingErrorHandler();
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                errorHandler.registerHandler(HibernateSystemException.class, new HibernateSystemErrorHandler());
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                popup.setErrorHandler(errorHandler);
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                final ListSelect termSelect = new ListSelect();
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                termSelect.setSizeFull();
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                termSelect.setContainerDataSource(getPresenter().getPresenceAbsenceTermContainer());
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                termSelect.setNullSelectionAllowed(presenceAbsenceTerm != null);
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                if(presenceAbsenceTerm != null){
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                	termSelect.setNullSelectionItemId(Messages.getLocalizedString(Messages.DistributionTableViewBean_NO_STATUS_SELECT));
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                }else{
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                    logger.debug("No distribution status exists yet for area");
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                }
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                termSelect.setValue(presenceAbsenceTerm);
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                termSelect.addValueChangeListener(valueChangeEvent -> {
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						Object distributionStatus = valueChangeEvent.getProperty().getValue();
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						getPresenter().updateDistributionField(areaID, distributionStatus, taxon);
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						container.refresh();
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						popup.close();
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				});
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                VerticalLayout layout = new VerticalLayout(termSelect);
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                popup.setContent(layout);
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                popup.setModal(true);
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                popup.center();
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                UI.getCurrent().addWindow(popup);
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            }
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        });
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		mainLayout.addComponent(table, "top:75px;right:10.0px;left:10.0px;");
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//		grid = new Grid();
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//		grid.setSizeFull();
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//		grid.setEditorEnabled(true);
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//      grid.setFooterVisible(true);
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//		mainLayout.addComponent(grid, "top:75px;right:10.0px;left:10.0px;"); //$NON-NLS-1$
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		return mainLayout;
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	}
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    /**
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     * {@inheritDoc}
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     */
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	@Override
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	public void enter(ViewChangeEvent event) {
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	    update();
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	}
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    /**
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     * {@inheritDoc}
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     */
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	@Override
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	public void update(){
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		try {
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			container = getPresenter().getSQLContainer();
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		} catch (SQLException e) {
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			DistributionEditorUtil.showSqlError(e);
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			return;
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		}
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		if(container==null){
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			return;
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		}
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		table.setContainerDataSource(container);
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		List<String> columnHeaders = new ArrayList<>(Arrays.asList(table.getColumnHeaders()));
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		columnHeaders.remove(CdmQueryFactory.DTYPE_COLUMN);
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		columnHeaders.remove(CdmQueryFactory.ID_COLUMN);
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		columnHeaders.remove(CdmQueryFactory.UUID_COLUMN);
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		columnHeaders.remove(CdmQueryFactory.CLASSIFICATION_COLUMN);
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//		columnHeaders.sort(new Comparator<String>() {
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//            @Override
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//            public int compare(String o1, String o2) {
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//                if(o1.equals(CdmQueryFactory.TAXON_COLUMN) || o2.equals(CdmQueryFactory.TAXON_COLUMN)) {
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//                    return o1.equals(CdmQueryFactory.TAXON_COLUMN) ? -1 : 1;
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//                }
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//                if(o1.equals(CdmQueryFactory.RANK_COLUMN) || o2.equals(CdmQueryFactory.RANK_COLUMN)) {
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//                    return o1.equals(CdmQueryFactory.RANK_COLUMN) ? -1 : 1;
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//                }
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//
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//                // TODO: HACK FOR RL 2017, REMOVE AS SOON AS POSSIBLE
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//                if(o1.equals("DE") || o1.equals("Deutschland")
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//                        || o2.equals("DE") || o2.equals("Deutschland")) {
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//                    return (o1.equals("DE") || o1.equals("Deutschland")) ? -1 : 1;
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//                }
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//
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//                return o1.compareTo(o2);
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//            }
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//		});
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		List<String> columnList = new ArrayList<>(columnHeaders);
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		String[] string = new String[columnList.size()];
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		table.setVisibleColumns(columnList.toArray());
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		table.setColumnHeaders(columnList.toArray(string));
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		table.setColumnFooter(CdmQueryFactory.TAXON_COLUMN, String.format(Messages.getLocalizedString(Messages.DistributionTableViewBean_TOTAL_TAXA), container.size()));
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//        gridcontainer = getPresenter().getAreaDistributionStatusContainer();
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//        if(gridcontainer==null){
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//            return;
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//        }
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//
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//        if(footerRow != null) {
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//            grid.removeFooterRow(footerRow);
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//        }
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//		grid.removeAllColumns();
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//
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//        grid.setContainerDataSource(gridcontainer);
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//
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//        Column uuidColumn = grid.getColumn(DistributionStatusQuery.UUID_COLUMN);
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//        uuidColumn.setEditable(false);
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//        uuidColumn.setHidden(true);
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//        Column taxonColumn = grid.getColumn(DistributionStatusQuery.TAXON_COLUMN);
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//        taxonColumn.setEditable(false);
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//        taxonColumn.setHeaderCaption(Messages.DistributionTableViewBean_TAXON);
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//        taxonColumn.setLastFrozenColumn();
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//
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//        Converter<String, UUID> displayConverter = new PresenceAbsenceTermUuidTitleStringConverter();
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//        Converter<Object, UUID> editorConverter = new PresenceAbsenceTermUuidObjectConverter();
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//        for(Column c : grid.getColumns()) {
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//            if(c.isEditable()) {
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//                NamedArea namedArea = (NamedArea) CdmSpringContextHelper.getTermService().load((UUID.fromString(c.getHeaderCaption())));
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//                String caption = DistributionEditorUtil.isAbbreviatedLabels() ?
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//                        namedArea.getRepresentation(Language.DEFAULT()).getAbbreviatedLabel() : namedArea.getTitleCache();
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//                c.setHeaderCaption(caption);
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//                c.setConverter(displayConverter);
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//
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//                NativeSelect termSelect = new NativeSelect();
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//                termSelect.setSizeFull();
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//                termSelect.setContainerDataSource(getPresenter().getPresenceAbsenceTermContainer());
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//                termSelect.setItemCaptionMode(ItemCaptionMode.PROPERTY);
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//                termSelect.setItemCaptionPropertyId("titleCache"); //$NON-NLS-1$
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//                termSelect.setConverter(editorConverter);
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//                termSelect.setImmediate(true);
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//                c.setEditorField(termSelect);
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//            }
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//        }
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//        grid.getEditorFieldGroup().addCommitHandler(new CommitHandler() {
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//            private static final long serialVersionUID = 7515807188410712420L;
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//
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//            @Override
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//            public void preCommit(CommitEvent commitEvent) throws CommitException {
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//
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//            }
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//
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//            @Override
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//            public void postCommit(CommitEvent commitEvent) throws CommitException {
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//                gridcontainer.commit();
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//            }
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//        });
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//
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//        footerRow = grid.appendFooterRow();
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//        Object[] cells = grid.getColumns().stream().map(c -> c.getPropertyId()).toArray(Object[]::new);
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//        if(cells.length == 0) {
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//            return;
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//        }
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//        FooterCell footerCell = null;
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//        if(cells.length > 1) {
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//            footerCell = footerRow.join(cells);
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//        }else {
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//            footerCell = footerRow.getCell(cells[0]);
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//        }
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//        footerCell.setText(String.format(Messages.DistributionTableViewBean_TOTAL_TAXA, gridcontainer.size()));
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	}
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	private void createEditClickListener(){
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		//details
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	    Button detailButton = toolbar.getDetailButton();
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		detailButton.setCaption(Messages.getLocalizedString(Messages.DistributionTableViewBean_TAXON_DETAILS));
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		detailButton.addClickListener(event -> {
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				Object selectedItemId = DistributionTableViewBean.this.table.getValue();
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//				Object selectedItemId = DistributionTableViewBean.this.grid.getSelectedRow();
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				if(selectedItemId!=null){
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				    final UUID uuid = UUID.fromString(table.getContainerDataSource().getItem(selectedItemId).getItemProperty("uuid").getValue().toString());
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//					final UUID uuid = (UUID) selectedItemId;
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					Taxon taxon = HibernateProxyHelper.deproxy(CdmSpringContextHelper.getTaxonService().load(uuid), Taxon.class);
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//					Taxon taxon = (Taxon) CdmSpringContextHelper.getTaxonService().load(uuid);
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					List<DescriptionElementBase> listDescriptions = getPresenter().listDescriptionElementsForTaxon(taxon, null);
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					DetailWindow detailWindow = new DetailWindow(taxon, listDescriptions);
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					Window window = detailWindow.createWindow();
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					window.center();
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					getUI().addWindow(window);
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				}
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				else{
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					Notification.show(Messages.getLocalizedString(Messages.DistributionTableViewBean_SELECT_TAXON), Type.HUMANIZED_MESSAGE);
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				}
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			}
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		);
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		//area and taxon
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		Button areaAndTaxonSettingsButton = toolbar.getDistributionSettingsButton();
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		areaAndTaxonSettingsButton.addClickListener(event -> openAreaAndTaxonSettings());
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		//distr status
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		Button distrStatusButton = toolbar.getSettingsButton();
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		distrStatusButton.addClickListener(event -> openStatusSettings());
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	    //help
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        Button helpButton = toolbar.getHelpButton();
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        helpButton.addClickListener(event -> openHelpWindow());
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	}
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    /**
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     * {@inheritDoc}
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     */
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	@Override
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	public void openStatusSettings() {
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        if(distributionStatusConfigWindow==null){
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            distributionStatusConfigWindow = new DistributionStatusSettingsConfigWindow(this);
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        }
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        Window window  = distributionStatusConfigWindow.createWindow(Messages.getLocalizedString(Messages.DistributionTableViewBean_STATUS));
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        window.setWidth("25%"); //$NON-NLS-1$
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        window.setHeight("60%"); //$NON-NLS-1$
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        UI.getCurrent().addWindow(window);
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	}
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    /**
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     * {@inheritDoc}
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     */
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	@Override
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	public void openAreaAndTaxonSettings() {
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		if(areaAndTaxonConfigWindow==null){
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			areaAndTaxonConfigWindow = new AreaAndTaxonSettingsConfigWindow(this);
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		}
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        Window window  = areaAndTaxonConfigWindow.createWindow(Messages.getLocalizedString(Messages.DistributionTableViewBean_AREAS_AND_TAXA));
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        UI.getCurrent().addWindow(window);
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	}
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	public void openHelpWindow() {
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	       if(helpWindow==null){
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	           helpWindow = new HelpWindow(this);
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	        }
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	        Window window  = helpWindow.createWindow(Messages.getLocalizedString(Messages.DistributionToolbar_HELP));
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	        UI.getCurrent().addWindow(window);
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	}
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    /**
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     * {@inheritDoc}
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     */
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	@Override
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	public boolean allowAnonymousAccess() {
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		// TODO Auto-generated method stub
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		return false;
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	}
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    /**
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     * {@inheritDoc}
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     */
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	@Override
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	public Collection<Collection<GrantedAuthority>> allowedGrantedAuthorities() {
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		// TODO Auto-generated method stub
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		return null;
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	}
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    /**
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     * {@inheritDoc}
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     */
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	@Override
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	protected String getHeaderText() {
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		// TODO Auto-generated method stub
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		return null;
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	}
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    /**
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     * {@inheritDoc}
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     */
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	@Override
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	protected String getSubHeaderText() {
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		// TODO Auto-generated method stub
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		return null;
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	}
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    /**
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     * {@inheritDoc}
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     */
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	@Override
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	protected void initContent() {
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	    // initialize layout
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        AbsoluteLayout mainLayout = initLayout();
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        setCompositionRoot(mainLayout);
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        // add click listener on DistributionToolbar-buttons
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        createEditClickListener();
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	}
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}