| /* |
| * 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.commons.collections; |
| |
| import java.util.Comparator; |
| |
| /** |
| * Defines a type of <code>Bag</code> that maintains a sorted order among |
| * its unique representative members. |
| * |
| * @param <E> the type to iterate over |
| * @since Commons Collections 2.0 |
| * @version $Revision$ $Date$ |
| * |
| * @author Chuck Burdick |
| */ |
| public interface SortedBag<E> extends Bag<E> { |
| |
| /** |
| * Returns the comparator associated with this sorted set, or null |
| * if it uses its elements' natural ordering. |
| * |
| * @return the comparator in use, or null if natural ordering |
| */ |
| public Comparator<? super E> comparator(); |
| |
| /** |
| * Returns the first (lowest) member. |
| * |
| * @return the first element in the sorted bag |
| */ |
| public E first(); |
| |
| /** |
| * Returns the last (highest) member. |
| * |
| * @return the last element in the sorted bag |
| */ |
| public E last(); |
| |
| } |