| /* |
| * Copyright (c) 2008, 2009, 2011, 2012, 2014 Eike Stepper (Berlin, 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.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * A default {@link IContainerEvent container event} implementation. |
| * |
| * @author Eike Stepper |
| * @noextend This class is not intended to be subclassed by clients. |
| * @apiviz.exclude |
| */ |
| public class ContainerEvent<E> extends Event implements IContainerEvent<E> |
| { |
| private static final long serialVersionUID = 1L; |
| |
| private List<IContainerDelta<E>> deltas; |
| |
| public ContainerEvent(IContainer<E> container) |
| { |
| super(container); |
| deltas = new ArrayList<IContainerDelta<E>>(); |
| } |
| |
| public ContainerEvent(IContainer<E> container, List<IContainerDelta<E>> deltas) |
| { |
| super(container); |
| this.deltas = deltas; |
| } |
| |
| /** |
| * @since 3.0 |
| */ |
| @Override |
| @SuppressWarnings("unchecked") |
| public IContainer<E> getSource() |
| { |
| return (IContainer<E>)super.getSource(); |
| } |
| |
| public boolean isEmpty() |
| { |
| return deltas.isEmpty(); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public IContainerDelta<E>[] getDeltas() |
| { |
| return deltas.toArray(new IContainerDelta[deltas.size()]); |
| } |
| |
| public IContainerDelta<E> getDelta() throws IllegalStateException |
| { |
| if (deltas.size() != 1) |
| { |
| throw new IllegalStateException("deltas.size() != 1"); //$NON-NLS-1$ |
| } |
| |
| return deltas.get(0); |
| } |
| |
| public E getDeltaElement() throws IllegalStateException |
| { |
| return getDelta().getElement(); |
| } |
| |
| public IContainerDelta.Kind getDeltaKind() throws IllegalStateException |
| { |
| return getDelta().getKind(); |
| } |
| |
| public void addDelta(E element, IContainerDelta.Kind kind) |
| { |
| addDelta(new ContainerDelta<E>(element, kind)); |
| } |
| |
| public void addDelta(IContainerDelta<E> delta) |
| { |
| deltas.add(delta); |
| } |
| |
| public void accept(IContainerEventVisitor<E> visitor) |
| { |
| for (IContainerDelta<E> delta : deltas) |
| { |
| E element = delta.getElement(); |
| |
| boolean filtered = true; |
| if (visitor instanceof Filtered<?>) |
| { |
| filtered = ((Filtered<E>)visitor).filter(element); |
| } |
| |
| if (filtered) |
| { |
| switch (delta.getKind()) |
| { |
| case ADDED: |
| visitor.added(element); |
| break; |
| case REMOVED: |
| visitor.removed(element); |
| break; |
| } |
| } |
| } |
| } |
| |
| @Override |
| protected String formatAdditionalParameters() |
| { |
| StringBuilder builder = new StringBuilder(); |
| for (IContainerDelta<E> delta : getDeltas()) |
| { |
| if (builder.length() != 0) |
| { |
| builder.append(", "); //$NON-NLS-1$ |
| } |
| |
| builder.append(delta.getKind()); |
| builder.append("="); //$NON-NLS-1$ |
| builder.append(delta.getElement()); |
| } |
| |
| return builder.toString(); |
| } |
| } |