Jake Slack | 03928ae | 2014-05-13 18:41:56 -0700 | [diff] [blame] | 1 | // |
| 2 | // ======================================================================== |
| 3 | // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
| 4 | // ------------------------------------------------------------------------ |
| 5 | // All rights reserved. This program and the accompanying materials |
| 6 | // are made available under the terms of the Eclipse Public License v1.0 |
| 7 | // and Apache License v2.0 which accompanies this distribution. |
| 8 | // |
| 9 | // The Eclipse Public License is available at |
| 10 | // http://www.eclipse.org/legal/epl-v10.html |
| 11 | // |
| 12 | // The Apache License v2.0 is available at |
| 13 | // http://www.opensource.org/licenses/apache2.0.php |
| 14 | // |
| 15 | // You may elect to redistribute this code under either of these licenses. |
| 16 | // ======================================================================== |
| 17 | // |
| 18 | |
| 19 | package org.eclipse.jetty.io; |
| 20 | |
| 21 | import org.eclipse.jetty.io.nio.DirectNIOBuffer; |
| 22 | import org.eclipse.jetty.io.nio.IndirectNIOBuffer; |
| 23 | |
| 24 | public abstract class AbstractBuffers implements Buffers |
| 25 | { |
| 26 | protected final Buffers.Type _headerType; |
| 27 | protected final int _headerSize; |
| 28 | protected final Buffers.Type _bufferType; |
| 29 | protected final int _bufferSize; |
| 30 | protected final Buffers.Type _otherType; |
| 31 | |
| 32 | /* ------------------------------------------------------------ */ |
| 33 | public AbstractBuffers(Buffers.Type headerType, int headerSize, Buffers.Type bufferType, int bufferSize, Buffers.Type otherType) |
| 34 | { |
| 35 | _headerType=headerType; |
| 36 | _headerSize=headerSize; |
| 37 | _bufferType=bufferType; |
| 38 | _bufferSize=bufferSize; |
| 39 | _otherType=otherType; |
| 40 | } |
| 41 | |
| 42 | /* ------------------------------------------------------------ */ |
| 43 | /** |
| 44 | * @return Returns the buffer size in bytes. |
| 45 | */ |
| 46 | public int getBufferSize() |
| 47 | { |
| 48 | return _bufferSize; |
| 49 | } |
| 50 | |
| 51 | /* ------------------------------------------------------------ */ |
| 52 | /** |
| 53 | * @return Returns the header size in bytes. |
| 54 | */ |
| 55 | public int getHeaderSize() |
| 56 | { |
| 57 | return _headerSize; |
| 58 | } |
| 59 | |
| 60 | |
| 61 | /* ------------------------------------------------------------ */ |
| 62 | /** |
| 63 | * Create a new header Buffer |
| 64 | * @return new Buffer |
| 65 | */ |
| 66 | final protected Buffer newHeader() |
| 67 | { |
| 68 | switch(_headerType) |
| 69 | { |
| 70 | case BYTE_ARRAY: |
| 71 | return new ByteArrayBuffer(_headerSize); |
| 72 | case DIRECT: |
| 73 | return new DirectNIOBuffer(_headerSize); |
| 74 | case INDIRECT: |
| 75 | return new IndirectNIOBuffer(_headerSize); |
| 76 | } |
| 77 | throw new IllegalStateException(); |
| 78 | } |
| 79 | |
| 80 | /* ------------------------------------------------------------ */ |
| 81 | /** |
| 82 | * Create a new content Buffer |
| 83 | * @return new Buffer |
| 84 | */ |
| 85 | final protected Buffer newBuffer() |
| 86 | { |
| 87 | switch(_bufferType) |
| 88 | { |
| 89 | case BYTE_ARRAY: |
| 90 | return new ByteArrayBuffer(_bufferSize); |
| 91 | case DIRECT: |
| 92 | return new DirectNIOBuffer(_bufferSize); |
| 93 | case INDIRECT: |
| 94 | return new IndirectNIOBuffer(_bufferSize); |
| 95 | } |
| 96 | throw new IllegalStateException(); |
| 97 | } |
| 98 | |
| 99 | /* ------------------------------------------------------------ */ |
| 100 | /** |
| 101 | * Create a new content Buffer |
| 102 | * @param size |
| 103 | * @return new Buffer |
| 104 | */ |
| 105 | final protected Buffer newBuffer(int size) |
| 106 | { |
| 107 | switch(_otherType) |
| 108 | { |
| 109 | case BYTE_ARRAY: |
| 110 | return new ByteArrayBuffer(size); |
| 111 | case DIRECT: |
| 112 | return new DirectNIOBuffer(size); |
| 113 | case INDIRECT: |
| 114 | return new IndirectNIOBuffer(size); |
| 115 | } |
| 116 | throw new IllegalStateException(); |
| 117 | } |
| 118 | |
| 119 | /* ------------------------------------------------------------ */ |
| 120 | /** |
| 121 | * @param buffer |
| 122 | * @return True if the buffer is the correct type to be a Header buffer |
| 123 | */ |
| 124 | public final boolean isHeader(Buffer buffer) |
| 125 | { |
| 126 | if (buffer.capacity()==_headerSize) |
| 127 | { |
| 128 | switch(_headerType) |
| 129 | { |
| 130 | case BYTE_ARRAY: |
| 131 | return buffer instanceof ByteArrayBuffer && !(buffer instanceof IndirectNIOBuffer); |
| 132 | case DIRECT: |
| 133 | return buffer instanceof DirectNIOBuffer; |
| 134 | case INDIRECT: |
| 135 | return buffer instanceof IndirectNIOBuffer; |
| 136 | } |
| 137 | } |
| 138 | return false; |
| 139 | } |
| 140 | |
| 141 | /* ------------------------------------------------------------ */ |
| 142 | /** |
| 143 | * @param buffer |
| 144 | * @return True if the buffer is the correct type to be a Header buffer |
| 145 | */ |
| 146 | public final boolean isBuffer(Buffer buffer) |
| 147 | { |
| 148 | if (buffer.capacity()==_bufferSize) |
| 149 | { |
| 150 | switch(_bufferType) |
| 151 | { |
| 152 | case BYTE_ARRAY: |
| 153 | return buffer instanceof ByteArrayBuffer && !(buffer instanceof IndirectNIOBuffer); |
| 154 | case DIRECT: |
| 155 | return buffer instanceof DirectNIOBuffer; |
| 156 | case INDIRECT: |
| 157 | return buffer instanceof IndirectNIOBuffer; |
| 158 | } |
| 159 | } |
| 160 | return false; |
| 161 | } |
| 162 | |
| 163 | /* ------------------------------------------------------------ */ |
| 164 | public String toString() |
| 165 | { |
| 166 | return String.format("%s [%d,%d]", getClass().getSimpleName(), _headerSize, _bufferSize); |
| 167 | } |
| 168 | } |