| /* |
| * 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.collections4; |
| |
| import java.util.Iterator; |
| |
| /** |
| * Defines an iterator that operates over an ordered container. Subset of {@link java.util.ListIterator}. |
| * <p> |
| * This iterator allows both forward and reverse iteration through the container. |
| * |
| * @param <E> the type to iterate over |
| * @since 3.0 |
| * @version $Id$ |
| */ |
| public interface OrderedIterator<E> extends Iterator<E> { |
| |
| /** |
| * Checks to see if there is a previous element that can be iterated to. |
| * |
| * @return <code>true</code> if the iterator has a previous element |
| */ |
| boolean hasPrevious(); |
| |
| /** |
| * Gets the previous element from the container. |
| * |
| * @return the previous element in the iteration |
| * @throws java.util.NoSuchElementException if the iteration is finished |
| */ |
| E previous(); |
| |
| } |