| /* |
| * 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.felix.log; |
| |
| import java.util.Enumeration; |
| |
| import org.osgi.service.log.LogEntry; |
| |
| /** |
| * Implementation of the {@link Enumeration} interface for a linked list of |
| * {@link LogNode} entries. |
| */ |
| final class LogNodeEnumeration implements Enumeration |
| { |
| /** The next node. */ |
| private LogNode m_next; |
| /** The last node. */ |
| private final LogNode m_last; |
| |
| /** |
| * Creates a new instance. |
| * @param start the first node to return |
| * @param end the last node to return |
| */ |
| LogNodeEnumeration(final LogNode start, final LogNode end) |
| { |
| m_next = start; |
| m_last = end; |
| } |
| |
| /** |
| * Determines whether there are any more elements to return. |
| * @return <code>true</code> if there are more elements; <code>false</code> otherwise |
| */ |
| public boolean hasMoreElements() |
| { |
| return m_next != null; |
| } |
| |
| /** |
| * Returns the current element and moves onto the next element. |
| * @return the current element |
| */ |
| public Object nextElement() |
| { |
| LogEntry result = null; |
| |
| if (m_next == m_last) |
| { |
| result = m_next.getEntry(); |
| m_next = null; |
| } |
| else if (m_next != null) |
| { |
| result = m_next.getEntry(); |
| m_next = m_next.getNextNode(); |
| } |
| |
| return result; |
| } |
| } |