| /******************************************************************************* |
| * Copyright (c) 2000, 2015 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jface.text.source.projection; |
| |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Set; |
| |
| import org.eclipse.jface.text.source.Annotation; |
| |
| /** |
| * A bag of annotations. |
| * <p> |
| * This class is not intended to be subclassed. |
| * </p> |
| * |
| * @since 3.0 |
| * @noextend This class is not intended to be subclassed by clients. |
| */ |
| public class AnnotationBag extends Annotation { |
| |
| private Set<Annotation> fAnnotations; |
| |
| /** |
| * Creates a new annotation bag. |
| * |
| * @param type the annotation type |
| */ |
| public AnnotationBag(String type) { |
| super(type, false, null); |
| } |
| |
| /** |
| * Adds the given annotation to the annotation bag. |
| * |
| * @param annotation the annotation to add |
| */ |
| public void add(Annotation annotation) { |
| if (fAnnotations == null) |
| fAnnotations= new HashSet<>(2); |
| fAnnotations.add(annotation); |
| } |
| |
| /** |
| * Removes the given annotation from the annotation bag. |
| * |
| * @param annotation the annotation to remove |
| */ |
| public void remove(Annotation annotation) { |
| if (fAnnotations != null) { |
| fAnnotations.remove(annotation); |
| if (fAnnotations.isEmpty()) |
| fAnnotations= null; |
| } |
| } |
| |
| /** |
| * Returns whether the annotation bag is empty. |
| * |
| * @return <code>true</code> if the annotation bag is empty, <code>false</code> otherwise |
| */ |
| public boolean isEmpty() { |
| return fAnnotations == null; |
| } |
| |
| /** |
| * Returns an iterator for all annotation inside this |
| * annotation bag or <code>null</code> if the bag is empty. |
| * |
| * @return an iterator for all annotations in the bag or <code>null</code> |
| * @since 3.1 |
| */ |
| public Iterator<Annotation> iterator() { |
| if (!isEmpty()) |
| return fAnnotations.iterator(); |
| return null; |
| } |
| } |