Examples with ItemSetChangeListener com.vaadin.data.Container.ItemSetChangeListener used on opensource projects

Example 1 with ItemSetChangeListener

use of com.vaadin.data.Container.ItemSetChangeListener in project VaadinUtils by rlsutton1.

the class BaseCrudView method commitContainerAndGetEntityFromDB.

/**
 * commits the container and retrieves the new recordid we have to hook the
 * ItemSetChangeListener to be able to get the database id of a new record.
 */
private E commitContainerAndGetEntityFromDB() {
    // don't really need an AtomicReference, just using it as a mutable
    // final variable to be used in the callback
    final AtomicReference<E> entityReference = new AtomicReference<>();
    // call back to collect the id of the new record when the container
    // fires the ItemSetChangeEvent
    ItemSetChangeListener tempListener = new ItemSetChangeListener() {

        private static final long serialVersionUID = 8086546233136795406L;

        @Override
        public void containerItemSetChange(ItemSetChangeEvent event) {
            if (event instanceof ProviderChangedEvent) {
                @SuppressWarnings("rawtypes") ProviderChangedEvent pce = (ProviderChangedEvent) event;
                @SuppressWarnings("unchecked") Collection<E> affectedEntities = pce.getChangeEvent().getAffectedEntities();
                if (affectedEntities.size() > 0) {
                    @SuppressWarnings("unchecked") E entity = (E) affectedEntities.toArray()[0];
                    entityReference.set(entity);
                }
            }
        }
    };
    // Only remove the listeners if we are editing an existing entity. If it
    // is a new entity then we need the listeners to update components with
    // the new entity.
    final LinkedList<ItemSetChangeListener> listeners = new LinkedList<>();
    if (newEntity == null) {
        listeners.addAll(container.getItemSetChangeListeners());
    }
    try {
        // get existing listeners and remove them
        for (ItemSetChangeListener listener : listeners) {
            container.removeItemSetChangeListener(listener);
        }
        // add the temp listener
        container.addItemSetChangeListener(tempListener);
        // call commit
        container.commit();
        entityReference.set(EntityManagerProvider.getEntityManager().merge(entityReference.get()));
    } catch (Exception e) {
        ErrorWindow.showErrorWindow(e);
    } finally {
        // detach the temp listener
        container.removeItemSetChangeListener(tempListener);
        // restore the existing listeners
        for (ItemSetChangeListener listener : listeners) {
            container.addItemSetChangeListener(listener);
        }
    }
    // return the entity
    return entityReference.get();
}

Example 2 with ItemSetChangeListener

use of com.vaadin.data.Container.ItemSetChangeListener in project VaadinUtils by rlsutton1.

the class SingleEntityWizardStep method commitContainerAndGetEntityFromDB.

/**
 * commits the container and retrieves the new recordid
 *
 * we have to hook the ItemSetChangeListener to be able to get the database
 * id of a new record.
 */
private E commitContainerAndGetEntityFromDB() {
    // don't really need an AtomicReference, just using it as a mutable
    // final variable to be used in the callback
    final AtomicReference<E> newEntity = new AtomicReference<>();
    // call back to collect the id of the new record when the container
    // fires the ItemSetChangeEvent
    ItemSetChangeListener tmp = new ItemSetChangeListener() {

        /**
         */
        private static final long serialVersionUID = 9132090066374531277L;

        @Override
        public void containerItemSetChange(ItemSetChangeEvent event) {
            if (event instanceof ProviderChangedEvent) {
                @SuppressWarnings("rawtypes") ProviderChangedEvent pce = (ProviderChangedEvent) event;
                @SuppressWarnings("unchecked") Collection<E> affectedEntities = pce.getChangeEvent().getAffectedEntities();
                if (affectedEntities.size() > 0) {
                    @SuppressWarnings("unchecked") E id = (E) affectedEntities.toArray()[0];
                    newEntity.set(id);
                }
            }
        }
    };
    try {
        // add the listener
        container.addItemSetChangeListener(tmp);
        // call commit
        container.commit();
        newEntity.set(EntityManagerProvider.getEntityManager().merge(newEntity.get()));
    } catch (com.vaadin.data.Buffered.SourceException e) {
        if (e.getCause() instanceof javax.persistence.PersistenceException) {
            javax.persistence.PersistenceException cause = (javax.persistence.PersistenceException) e.getCause();
            Notification.show(cause.getCause().getMessage(), Type.ERROR_MESSAGE);
        }
    } finally {
        // detach the listener
        container.removeItemSetChangeListener(tmp);
    }
    // return the entity
    return newEntity.get();
}

Example 3 with ItemSetChangeListener

use of com.vaadin.data.Container.ItemSetChangeListener in project VaadinUtils by rlsutton1.

the class ChildCrudView method commitContainerWithHooks.

/**
 * commits the container and retrieves the new recordid
 *
 * we have to hook the ItemSetChangeListener to be able to get the database
 * id of a new record.
 */
private void commitContainerWithHooks() {
    // call back to collect the id of the new record when the container
    // fires the ItemSetChangeEvent
    ItemSetChangeListener tmp = new ItemSetChangeListener() {

        private static final long serialVersionUID = -4893881323343394274L;

        @Override
        public void containerItemSetChange(ItemSetChangeEvent event) {
            if (event instanceof ProviderChangedEvent) {
                @SuppressWarnings("rawtypes") ProviderChangedEvent pce = (ProviderChangedEvent) event;
                @SuppressWarnings("unchecked") EntityProviderChangeEvent<E> changeEvent = pce.getChangeEvent();
                if (changeEvent instanceof EntitiesAddedEvent) {
                    Collection<E> affectedEntities = changeEvent.getAffectedEntities();
                    eventHandler.entitiesAdded(affectedEntities);
                }
                if (changeEvent instanceof EntitiesUpdatedEvent) {
                    Collection<E> affectedEntities = changeEvent.getAffectedEntities();
                    eventHandler.entitiesUpdated(affectedEntities);
                }
                if (changeEvent instanceof EntitiesRemovedEvent) {
                    Collection<E> affectedEntitys = changeEvent.getAffectedEntities();
                    eventHandler.entitiesDeleted(affectedEntitys);
                }
            }
        }
    };
    final LinkedList<ItemSetChangeListener> listeners = new LinkedList<>(container.getItemSetChangeListeners());
    try {
        // get existing listeners and remove them
        for (ItemSetChangeListener listener : listeners) {
            container.removeItemSetChangeListener(listener);
        }
        // add the hook listener
        container.addItemSetChangeListener(tmp);
        // call commit
        container.commit();
    } catch (Exception e) {
        ErrorWindow.showErrorWindow(e);
    } finally {
        // detach the hook listener
        container.removeItemSetChangeListener(tmp);
        // restore the existing listeners
        for (ItemSetChangeListener listener : listeners) {
            container.addItemSetChangeListener(listener);
        }
    }
}