| /* |
| * 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.directory.shared.ldap.util; |
| |
| |
| import javax.naming.NamingEnumeration; |
| |
| import java.util.NoSuchElementException; |
| |
| |
| /** |
| * A NamingEnumeration over a single element. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| * @version $Revision$ |
| */ |
| public class SingletonEnumeration<T> implements NamingEnumeration<T> |
| { |
| /** The singleton element to return */ |
| private final T element; |
| |
| /** Can we return a element */ |
| private boolean hasMore = true; |
| |
| |
| /** |
| * Creates a NamingEnumeration over a single element. |
| * |
| * @param element |
| * TODO |
| */ |
| public SingletonEnumeration(final T element) |
| { |
| this.element = element; |
| } |
| |
| |
| /** |
| * Makes calls to hasMore to false even if we had more. |
| * |
| * @see javax.naming.NamingEnumeration#close() |
| */ |
| public void close() |
| { |
| hasMore = false; |
| } |
| |
| |
| /** |
| * @see javax.naming.NamingEnumeration#hasMore() |
| */ |
| public boolean hasMore() |
| { |
| return hasMore; |
| } |
| |
| |
| /** |
| * @see javax.naming.NamingEnumeration#next() |
| */ |
| public T next() |
| { |
| if ( hasMore ) |
| { |
| hasMore = false; |
| return element; |
| } |
| |
| throw new NoSuchElementException(); |
| } |
| |
| |
| /** |
| * @see java.util.Enumeration#hasMoreElements() |
| */ |
| public boolean hasMoreElements() |
| { |
| return hasMore; |
| } |
| |
| |
| /** |
| * @see java.util.Enumeration#nextElement() |
| */ |
| public T nextElement() |
| { |
| return next(); |
| } |
| } |