| /******************************************************************************* |
| * Copyright (c) 2010, 2016 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.osgi.internal.serviceregistry; |
| |
| import java.util.*; |
| |
| public class ShrinkableEntrySetValueCollection<E> extends AbstractCollection<E> implements Collection<E> { |
| private final Set<? extends Map.Entry<?, ? extends E>> entrySet; |
| |
| public ShrinkableEntrySetValueCollection(Set<? extends Map.Entry<?, ? extends E>> e) { |
| if (e == null) { |
| throw new NullPointerException(); |
| } |
| entrySet = e; |
| } |
| |
| public void clear() { |
| entrySet.clear(); |
| } |
| |
| public boolean isEmpty() { |
| return entrySet.isEmpty(); |
| } |
| |
| public Iterator<E> iterator() { |
| return new ValueIterator<>(entrySet.iterator()); |
| } |
| |
| public int size() { |
| return entrySet.size(); |
| } |
| |
| /** |
| * Iterator over the values of the entry set. |
| */ |
| static private final class ValueIterator<E> implements Iterator<E> { |
| private final Iterator<? extends Map.Entry<?, ? extends E>> iter; |
| |
| ValueIterator(Iterator<? extends Map.Entry<?, ? extends E>> i) { |
| iter = i; |
| } |
| |
| public boolean hasNext() { |
| return iter.hasNext(); |
| } |
| |
| public E next() { |
| final Map.Entry<?, ? extends E> entry = iter.next(); |
| return entry.getValue(); |
| } |
| |
| public void remove() { |
| iter.remove(); |
| } |
| } |
| } |