ActiveIO - 1.0

Clover coverage report - ActiveIO - 1.0 Coverage timestamp: Fri Apr 22 2005 14:27:22 PDT FRAMES NO FRAMES |
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% |

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 |  |
     }