| /* |
| * Copyright (c) 2008, 2009, 2011, 2012, 2014, 2019 Eike Stepper (Loehne, Germany) and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Eike Stepper - initial API and implementation |
| */ |
| package org.eclipse.net4j.util.container; |
| |
| import org.eclipse.net4j.util.container.IContainerEventVisitor.Filtered; |
| import org.eclipse.net4j.util.event.Event; |
| |
| import java.text.MessageFormat; |
| |
| /** |
| * A {@link IContainerEvent container event} with a single element {@link IContainerDelta delta}. |
| * |
| * @author Eike Stepper |
| * @noextend This class is not intended to be subclassed by clients. |
| */ |
| public class SingleDeltaContainerEvent<E> extends Event implements IContainerEvent<E> |
| { |
| private static final long serialVersionUID = 1L; |
| |
| private IContainerDelta<E>[] deltas; |
| |
| @SuppressWarnings("unchecked") |
| public SingleDeltaContainerEvent(IContainer<E> container, E element, IContainerDelta.Kind kind) |
| { |
| super(container); |
| deltas = new IContainerDelta[] { new ContainerDelta<E>(element, kind) }; |
| } |
| |
| /** |
| * @since 3.0 |
| */ |
| @Override |
| @SuppressWarnings("unchecked") |
| public IContainer<E> getSource() |
| { |
| return (IContainer<E>)super.getSource(); |
| } |
| |
| public boolean isEmpty() |
| { |
| return false; |
| } |
| |
| public IContainerDelta<E>[] getDeltas() |
| { |
| return deltas; |
| } |
| |
| public IContainerDelta<E> getDelta() throws IllegalStateException |
| { |
| return deltas[0]; |
| } |
| |
| public E getDeltaElement() throws IllegalStateException |
| { |
| return deltas[0].getElement(); |
| } |
| |
| public IContainerDelta.Kind getDeltaKind() throws IllegalStateException |
| { |
| return deltas[0].getKind(); |
| } |
| |
| public void accept(IContainerEventVisitor<E> visitor) |
| { |
| E element = deltas[0].getElement(); |
| |
| boolean filtered = true; |
| if (visitor instanceof Filtered<?>) |
| { |
| filtered = ((Filtered<E>)visitor).filter(element); |
| } |
| |
| if (filtered) |
| { |
| switch (deltas[0].getKind()) |
| { |
| case ADDED: |
| visitor.added(element); |
| break; |
| case REMOVED: |
| visitor.removed(element); |
| break; |
| } |
| } |
| } |
| |
| @Override |
| public String toString() |
| { |
| return MessageFormat.format("ContainerEvent[source={0}, {1}={2}]", getSource(), getDeltaKind(), getDeltaElement()); //$NON-NLS-1$ |
| } |
| } |