001 /**************************************************************** 002 * Licensed to the Apache Software Foundation (ASF) under one * 003 * or more contributor license agreements. See the NOTICE file * 004 * distributed with this work for additional information * 005 * regarding copyright ownership. The ASF licenses this file * 006 * to you under the Apache License, Version 2.0 (the * 007 * "License"); you may not use this file except in compliance * 008 * with the License. You may obtain a copy of the License at * 009 * * 010 * http://www.apache.org/licenses/LICENSE-2.0 * 011 * * 012 * Unless required by applicable law or agreed to in writing, * 013 * software distributed under the License is distributed on an * 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * 015 * KIND, either express or implied. See the License for the * 016 * specific language governing permissions and limitations * 017 * under the License. * 018 ****************************************************************/ 019 020 package org.apache.james.mime4j.codec; 021 022 import java.util.Iterator; 023 024 public class ByteQueue implements Iterable<Byte> { 025 026 private UnboundedFifoByteBuffer buf; 027 private int initialCapacity = -1; 028 029 public ByteQueue() { 030 buf = new UnboundedFifoByteBuffer(); 031 } 032 033 public ByteQueue(int initialCapacity) { 034 buf = new UnboundedFifoByteBuffer(initialCapacity); 035 this.initialCapacity = initialCapacity; 036 } 037 038 public void enqueue(byte b) { 039 buf.add(b); 040 } 041 042 public byte dequeue() { 043 return buf.remove(); 044 } 045 046 public int count() { 047 return buf.size(); 048 } 049 050 public void clear() { 051 if (initialCapacity != -1) 052 buf = new UnboundedFifoByteBuffer(initialCapacity); 053 else 054 buf = new UnboundedFifoByteBuffer(); 055 } 056 057 public Iterator<Byte> iterator() { 058 return buf.iterator(); 059 } 060 061 062 }