| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.activemq.kaha.impl.container; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.apache.activemq.kaha.impl.index.IndexItem; |
| |
| /** |
| * A Set of keys for the container |
| * |
| * |
| */ |
| public class ContainerKeySet extends ContainerCollectionSupport implements Set { |
| |
| ContainerKeySet(MapContainerImpl container) { |
| super(container); |
| } |
| |
| public boolean contains(Object o) { |
| return container.containsKey(o); |
| } |
| |
| public Iterator iterator() { |
| return new ContainerKeySetIterator(container); |
| } |
| |
| public Object[] toArray() { |
| List<Object> list = new ArrayList<Object>(); |
| IndexItem item = container.getInternalList().getRoot(); |
| while ((item = container.getInternalList().getNextEntry(item)) != null) { |
| list.add(container.getKey(item)); |
| } |
| return list.toArray(); |
| } |
| |
| public Object[] toArray(Object[] a) { |
| List<Object> list = new ArrayList<Object>(); |
| IndexItem item = container.getInternalList().getRoot(); |
| while ((item = container.getInternalList().getNextEntry(item)) != null) { |
| list.add(container.getKey(item)); |
| } |
| return list.toArray(a); |
| } |
| |
| public boolean add(Object o) { |
| throw new UnsupportedOperationException("Cannot add here"); |
| } |
| |
| public boolean remove(Object o) { |
| return container.remove(o) != null; |
| } |
| |
| public boolean containsAll(Collection c) { |
| for (Object key : c) { |
| if (!container.containsKey(key)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| public boolean addAll(Collection c) { |
| throw new UnsupportedOperationException("Cannot add here"); |
| } |
| |
| public boolean retainAll(Collection c) { |
| List<Object> tmpList = new ArrayList<Object>(); |
| for (Iterator i = c.iterator(); i.hasNext();) { |
| Object o = i.next(); |
| if (!contains(o)) { |
| tmpList.add(o); |
| } |
| } |
| for (Iterator<Object> i = tmpList.iterator(); i.hasNext();) { |
| remove(i.next()); |
| } |
| return !tmpList.isEmpty(); |
| } |
| |
| public boolean removeAll(Collection c) { |
| boolean result = true; |
| for (Iterator i = c.iterator(); i.hasNext();) { |
| if (!remove(i.next())) { |
| result = false; |
| } |
| } |
| return result; |
| } |
| |
| public void clear() { |
| container.clear(); |
| } |
| |
| public String toString() { |
| StringBuffer result = new StringBuffer(32); |
| result.append("ContainerKeySet["); |
| IndexItem item = container.getInternalList().getRoot(); |
| while ((item = container.getInternalList().getNextEntry(item)) != null) { |
| result.append(container.getKey(item)); |
| result.append(","); |
| } |
| result.append("]"); |
| return result.toString(); |
| } |
| } |