| /* |
| * Copyright 2003-2004 The Apache Software Foundation |
| * |
| * Licensed 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.Iterator; |
| |
| /** |
| * Defines an iterator that operates over an ordered collection. |
| * <p> |
| * This iterator allows both forward and reverse iteration through the collection. |
| * |
| * @since Commons Collections 3.0 |
| * @version $Revision: 1.1 $ $Date: 2009/05/27 22:16:19 $ |
| * |
| * @author Stephen Colebourne |
| */ |
| public interface OrderedIterator extends Iterator { |
| |
| /** |
| * 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 collection. |
| * |
| * @return the previous element in the iteration |
| * @throws java.util.NoSuchElementException if the iteration is finished |
| */ |
| Object previous(); |
| |
| } |