Clover coverage report - ActiveIO - 1.0
Coverage timestamp: Fri Apr 22 2005 14:27:22 PDT
file stats: LOC: 101   Methods: 2
NCLOC: 58   Classes: 1
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 Source file Conditionals Statements Methods TOTAL
PacketAggregator.java 81.2% 87.5% 100% 86%
coverage coverage
 1   
 /**
 2   
  *
 3   
  * Copyright 2004 Hiram Chirino
 4   
  *
 5   
  *  Licensed under the Apache License, Version 2.0 (the "License");
 6   
  *  you may not use this file except in compliance with the License.
 7   
  *  You may obtain a copy of the License at
 8   
  *
 9   
  *     http://www.apache.org/licenses/LICENSE-2.0
 10   
  *
 11   
  *  Unless required by applicable law or agreed to in writing, software
 12   
  *  distributed under the License is distributed on an "AS IS" BASIS,
 13   
  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 14   
  *  See the License for the specific language governing permissions and
 15   
  *  limitations under the License.
 16   
  */
 17   
 package org.activeio.filter;
 18   
 
 19   
 import java.io.IOException;
 20   
 
 21   
 import org.activeio.Packet;
 22   
 import org.activeio.PacketData;
 23   
 import org.activeio.packet.AppendedPacket;
 24   
 import org.activeio.packet.ByteArrayPacket;
 25   
 import org.activeio.packet.EOSPacket;
 26   
 
 27   
 /**
 28   
  * @version $Revision$
 29   
  */
 30   
 abstract public class PacketAggregator {
 31   
 
 32   
     private static final int HEADER_LENGTH = 4;        
 33   
     
 34   
     private final ByteArrayPacket headerBuffer = new ByteArrayPacket(new byte[HEADER_LENGTH]);
 35   
     private final PacketData headerData = new PacketData(headerBuffer);
 36   
 
 37   
     Packet incompleteUpPacket;
 38   
     boolean headerLoaded;
 39   
     private int upPacketLength;
 40   
     
 41  32
     public void addRawPacket(Packet packet) throws IOException {
 42   
 
 43   
         // Passthrough the EOS packet.
 44  32
         if( packet == EOSPacket.EOS_PACKET ) {
 45  2
             packetAssembled(packet);
 46  2
             return;
 47   
         }
 48   
 
 49  30
         if (incompleteUpPacket != null) {
 50  0
             packet = AppendedPacket.join(incompleteUpPacket, packet);
 51  0
             incompleteUpPacket = null;
 52   
         }
 53   
 
 54  30
         while (true) {
 55   
 
 56  50
             if (!headerLoaded) {
 57  40
                 headerLoaded = packet.remaining() >= HEADER_LENGTH;
 58  40
                 if( headerLoaded ) {
 59  20
                     PacketData data = new PacketData(packet);
 60  20
                     upPacketLength = data.readInt();
 61  20
                     if( upPacketLength < 0 ) {
 62  0
                         throw new IOException("Up packet lenth was invalid: "+upPacketLength);
 63   
                     }
 64  20
                     packet = packet.slice();
 65   
                 }
 66  40
                 if( !headerLoaded )
 67  20
                     break;
 68   
             }
 69   
 
 70  30
             if (packet.remaining() < upPacketLength )
 71  10
                 break;
 72   
 
 73   
             // Get ready to create a slice to send up.
 74  20
             int origLimit = packet.limit();
 75  20
             packet.limit(upPacketLength);
 76  20
             packetAssembled(packet.slice());
 77   
             
 78   
             // Get a slice of the remaining since that will dump
 79   
             // the first packets of an AppendedPacket
 80  20
             packet.position(upPacketLength);
 81  20
             packet.limit(origLimit);
 82  20
             packet = packet.slice();
 83   
 
 84   
             // Need to load a header again now.
 85  20
             headerLoaded = false;
 86   
         }
 87  30
         if (packet.hasRemaining()) {
 88  0
             incompleteUpPacket = packet;
 89   
         }
 90   
         
 91   
     }
 92   
 
 93   
     protected abstract void packetAssembled(Packet packet);
 94   
     
 95  20
     public Packet getHeader( Packet packet ) throws IOException {
 96  20
         headerBuffer.clear();
 97  20
         headerData.writeInt(packet.remaining());
 98  20
         headerBuffer.flip();
 99  20
         return headerBuffer;
 100   
     }
 101   
 }