| /* |
| * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| import java.util.HashSet; |
| import java.util.AbstractSet; |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.Set; |
| import java.util.function.Supplier; |
| |
| /** |
| * @library |
| * |
| * A simple mutable set implementation that provides only default |
| * implementations of all methods. ie. none of the Set interface default methods |
| * have overridden implementations. |
| * |
| * @param <E> type of set members |
| */ |
| public class ExtendsAbstractSet<E> extends AbstractSet<E> { |
| |
| protected final Set<E> set; |
| |
| public ExtendsAbstractSet() { |
| this(HashSet<E>::new); |
| } |
| |
| public ExtendsAbstractSet(Collection<E> source) { |
| this(); |
| addAll(source); |
| } |
| |
| protected ExtendsAbstractSet(Supplier<Set<E>> backer) { |
| this.set = backer.get(); |
| } |
| |
| public boolean add(E element) { |
| return set.add(element); |
| } |
| |
| public boolean remove(Object element) { |
| return set.remove(element); |
| } |
| |
| public Iterator<E> iterator() { |
| return new Iterator<E>() { |
| Iterator<E> source = set.iterator(); |
| |
| public boolean hasNext() { |
| return source.hasNext(); |
| } |
| |
| public E next() { |
| return source.next(); |
| } |
| |
| public void remove() { |
| source.remove(); |
| } |
| }; |
| } |
| |
| public int size() { |
| return set.size(); |
| } |
| } |