Refactoring: loadAll is more precise

src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/business/EventBusiness.java

@@ -40,7 +40,7 @@ public class EventBusiness {
 			boolean forceRefresh) {
 		
 		if (forceRefresh == false) {
-			List<ClubEvent> list = dao.list();
+			List<ClubEvent> list = dao.listAll();
 			log.trace("Returning events from database: {}");
 			return list;
 		}
@@ -105,12 +105,14 @@ public class EventBusiness {
 
 			Set<Person> store = current.getPersons();
 			if (store != null) {
-				store.clear();
+				log.debug("adding to existing person set.");
 				store.addAll(selected);			
 			} else {
+				log.debug("setting persons to event without person set.");
 				current.setPersons(selected);
-				dao.update(current);
 			}
+			dao.update(current);
+			log.info("Updated {} with participants: {}", current, selected);
 		}
 	}
 }

src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/dao/AbstractDaoImpl.java

@@ -38,8 +38,7 @@ public abstract class AbstractDaoImpl<T> implements IDao<T> {
 	}
 	
 	@Override
-	public List<T> list() {
+	public List<T> listAll() {
-
 		TypedQuery<T> query = em.createNamedQuery(
 				entityClass.getSimpleName() + ".findAll", entityClass);
 		return query.getResultList();

src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/dao/IDao.java

@@ -6,6 +6,6 @@ public interface IDao<T> {
 
 	void save(T obj);
 	T update(T obj);
-	List<T> list();
+	List<T> listAll();
 	T get(Object primaryKey);
 }

src/main/java/de/kreth/vaadin/clubhelper/vaadinclubhelper/ui/components/PersonGrid.java

@@ -62,13 +62,13 @@ public class PersonGrid extends CustomComponent {
 		comboGroups.setEmptySelectionCaption("Alle");
 		comboGroups.setItemCaptionGenerator(GroupDef::getName);
 		comboGroups.addSelectionListener(ev -> onGroupSelected(ev));
-		List<GroupDef> items = groupDao.list();
+		allGroups = groupDao.listAll();
-		comboGroups.setItems(items);
+		comboGroups.setItems(allGroups);
-		log.info("Loaded Groups: {}", items);
+		log.info("Loaded Groups: {}", allGroups);
 
 		HorizontalLayout filters = new HorizontalLayout();
 		filters.addComponents(checkIncluded, comboGroups);
-		dataProvider = new ListDataProvider<>(new ArrayList<>());
+		dataProvider = new ListDataProvider<Person>(new ArrayList<>()).withConfigurableFilter();
 		grid = new Grid<>();
 		grid.setDataProvider(dataProvider);
 		grid.addColumn(Person::getPrename).setCaption("Vorname");
@@ -76,6 +76,7 @@ public class PersonGrid extends CustomComponent {
 		grid.addColumn(Person::getBirth,
 				b -> b != null ? birthFormat.format(b) : "")
 				.setCaption("Geburtstag");
+		grid.addComponentColumn(this::buildDeleteButton);
 		grid.setSelectionMode(SelectionMode.MULTI);
 
 		Button close = new Button("Schließen", ev -> {