86 lines
2.4 KiB
Java
86 lines
2.4 KiB
Java
/*
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* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.util.HashSet;
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import java.util.AbstractSet;
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import java.util.Collection;
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import java.util.Iterator;
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import java.util.Set;
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import java.util.function.Supplier;
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/**
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* @library
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*
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* A simple mutable set implementation that provides only default
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* implementations of all methods. ie. none of the Set interface default methods
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* have overridden implementations.
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*
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* @param <E> type of set members
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*/
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public class ExtendsAbstractSet<E> extends AbstractSet<E> {
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protected final Set<E> set;
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public ExtendsAbstractSet() {
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this(HashSet<E>::new);
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}
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public ExtendsAbstractSet(Collection<E> source) {
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this();
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addAll(source);
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}
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protected ExtendsAbstractSet(Supplier<Set<E>> backer) {
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this.set = backer.get();
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}
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public boolean add(E element) {
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return set.add(element);
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}
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public boolean remove(Object element) {
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return set.remove(element);
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}
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public Iterator<E> iterator() {
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return new Iterator<E>() {
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Iterator<E> source = set.iterator();
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public boolean hasNext() {
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return source.hasNext();
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}
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public E next() {
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return source.next();
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}
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public void remove() {
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source.remove();
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}
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};
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}
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public int size() {
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return set.size();
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}
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}
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