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annotate src/org/eclipse/jetty/io/View.java @ 1023:27f3dc761452
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| author | Franklin Schmidt <fschmidt@gmail.com> |
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| date | Tue, 01 Nov 2016 03:44:46 -0600 |
| parents | 0e96ce3db20a |
| children | cf0367978d8b |
| rev | line source |
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1 // |
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2 // ======================================================================== |
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
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4 // ------------------------------------------------------------------------ |
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5 // All rights reserved. This program and the accompanying materials |
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6 // are made available under the terms of the Eclipse Public License v1.0 |
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7 // and Apache License v2.0 which accompanies this distribution. |
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8 // |
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9 // The Eclipse Public License is available at |
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10 // http://www.eclipse.org/legal/epl-v10.html |
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11 // |
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12 // The Apache License v2.0 is available at |
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13 // http://www.opensource.org/licenses/apache2.0.php |
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14 // |
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15 // You may elect to redistribute this code under either of these licenses. |
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16 // ======================================================================== |
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17 // |
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18 |
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19 package org.eclipse.jetty.io; |
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20 |
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21 /** |
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22 * A View on another buffer. Allows operations that do not change the _content or |
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23 * indexes of the backing buffer. |
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24 * |
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25 * |
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26 * |
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27 */ |
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28 public class View extends AbstractBuffer |
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29 { |
| 1005 | 30 Buffer _buffer; |
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31 |
| 1005 | 32 /** |
| 33 * @param buffer The <code>Buffer</code> on which we are presenting a <code>View</code>. | |
| 34 * @param mark The initial value of the {@link Buffer#markIndex mark index} | |
| 35 * @param get The initial value of the {@link Buffer#getIndex get index} | |
| 36 * @param put The initial value of the {@link Buffer#putIndex put index} | |
| 37 * @param access The access level - one of the constants from {@link Buffer}. | |
| 38 */ | |
| 39 public View(Buffer buffer, int mark, int get, int put,int access) | |
| 40 { | |
| 41 super(READWRITE,!buffer.isImmutable()); | |
| 42 _buffer=buffer.buffer(); | |
| 43 setPutIndex(put); | |
| 44 setGetIndex(get); | |
| 45 setMarkIndex(mark); | |
| 46 _access=access; | |
| 47 } | |
| 48 | |
| 49 public View(Buffer buffer) | |
| 50 { | |
| 51 super(READWRITE,!buffer.isImmutable()); | |
| 52 _buffer=buffer.buffer(); | |
| 53 setPutIndex(buffer.putIndex()); | |
| 54 setGetIndex(buffer.getIndex()); | |
| 55 setMarkIndex(buffer.markIndex()); | |
| 56 _access=buffer.isReadOnly()?READONLY:READWRITE; | |
| 57 } | |
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58 |
| 1005 | 59 public View() |
| 60 { | |
| 61 super(READWRITE,true); | |
| 62 } | |
| 63 | |
| 64 /** | |
| 65 * Update view to buffer | |
| 66 */ | |
| 67 public void update(Buffer buffer) | |
| 68 { | |
| 69 _access=READWRITE; | |
| 70 _buffer=buffer.buffer(); | |
| 71 setGetIndex(0); | |
| 72 setPutIndex(buffer.putIndex()); | |
| 73 setGetIndex(buffer.getIndex()); | |
| 74 setMarkIndex(buffer.markIndex()); | |
| 75 _access=buffer.isReadOnly()?READONLY:READWRITE; | |
| 76 } | |
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77 |
| 1005 | 78 public void update(int get, int put) |
| 79 { | |
| 80 int a=_access; | |
| 81 _access=READWRITE; | |
| 82 setGetIndex(0); | |
| 83 setPutIndex(put); | |
| 84 setGetIndex(get); | |
| 85 setMarkIndex(-1); | |
| 86 _access=a; | |
| 87 } | |
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88 |
| 1005 | 89 /** |
| 90 * @return The {@link Buffer#array()} from the underlying buffer. | |
| 91 */ | |
| 92 public byte[] array() | |
| 93 { | |
| 94 return _buffer.array(); | |
| 95 } | |
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96 |
| 1005 | 97 /** |
| 98 * @return The {@link Buffer#buffer()} from the underlying buffer. | |
| 99 */ | |
| 100 @Override | |
| 101 public Buffer buffer() | |
| 102 { | |
| 103 return _buffer.buffer(); | |
| 104 } | |
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105 |
| 1005 | 106 /** |
| 107 * @return The {@link Buffer#capacity} of the underlying buffer. | |
| 108 */ | |
| 109 public int capacity() | |
| 110 { | |
| 111 return _buffer.capacity(); | |
| 112 } | |
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113 |
| 1005 | 114 /** |
| 115 * | |
| 116 */ | |
| 117 @Override | |
| 118 public void clear() | |
| 119 { | |
| 120 setMarkIndex(-1); | |
| 121 setGetIndex(0); | |
| 122 setPutIndex(_buffer.getIndex()); | |
| 123 setGetIndex(_buffer.getIndex()); | |
| 124 } | |
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125 |
| 1005 | 126 /** |
| 127 * | |
| 128 */ | |
| 129 @Override | |
| 130 public void compact() | |
| 131 { | |
| 132 // TODO | |
| 133 } | |
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134 |
| 1005 | 135 /* |
| 136 * (non-Javadoc) | |
| 137 * | |
| 138 * @see java.lang.Object#equals(java.lang.Object) | |
| 139 */ | |
| 140 @Override | |
| 141 public boolean equals(Object obj) | |
| 142 { | |
| 143 return this==obj ||((obj instanceof Buffer)&& obj.equals(this)) || super.equals(obj); | |
| 144 } | |
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145 |
| 1005 | 146 /** |
| 147 * @return Whether the underlying buffer is {@link Buffer#isReadOnly read only} | |
| 148 */ | |
| 149 @Override | |
| 150 public boolean isReadOnly() | |
| 151 { | |
| 152 return _buffer.isReadOnly(); | |
| 153 } | |
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154 |
| 1005 | 155 /** |
| 156 * @return Whether the underlying buffer is {@link Buffer#isVolatile volatile} | |
| 157 */ | |
| 158 @Override | |
| 159 public boolean isVolatile() | |
| 160 { | |
| 161 return true; | |
| 162 } | |
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163 |
| 1005 | 164 /** |
| 165 * @return The result of calling {@link Buffer#peek(int)} on the underlying buffer | |
| 166 */ | |
| 167 public byte peek(int index) | |
| 168 { | |
| 169 return _buffer.peek(index); | |
| 170 } | |
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171 |
| 1005 | 172 /** |
| 173 * @return The result of calling {@link Buffer#peek(int, byte[], int, int)} on the underlying buffer | |
| 174 */ | |
| 175 public int peek(int index, byte[] b, int offset, int length) | |
| 176 { | |
| 177 return _buffer.peek(index,b,offset,length); | |
| 178 } | |
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179 |
| 1005 | 180 /** |
| 181 * @return The result of calling {@link Buffer#peek(int, int)} on the underlying buffer | |
| 182 */ | |
| 183 @Override | |
| 184 public Buffer peek(int index, int length) | |
| 185 { | |
| 186 return _buffer.peek(index, length); | |
| 187 } | |
| 188 | |
| 189 /** | |
| 190 * @param index | |
| 191 * @param src | |
| 192 */ | |
| 193 @Override | |
| 194 public int poke(int index, Buffer src) | |
| 195 { | |
| 196 return _buffer.poke(index,src); | |
| 197 } | |
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198 |
| 1005 | 199 /** |
| 200 * @param index | |
| 201 * @param b | |
| 202 */ | |
| 203 public void poke(int index, byte b) | |
| 204 { | |
| 205 _buffer.poke(index,b); | |
| 206 } | |
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207 |
| 1005 | 208 /** |
| 209 * @param index | |
| 210 * @param b | |
| 211 * @param offset | |
| 212 * @param length | |
| 213 */ | |
| 214 @Override | |
| 215 public int poke(int index, byte[] b, int offset, int length) | |
| 216 { | |
| 217 return _buffer.poke(index,b,offset,length); | |
| 218 } | |
| 219 | |
| 220 @Override | |
| 221 public String toString() | |
| 222 { | |
| 223 if (_buffer==null) | |
| 224 return "INVALID"; | |
| 225 return super.toString(); | |
| 226 } | |
| 227 | |
| 228 public static class CaseInsensitive extends View implements Buffer.CaseInsensitve | |
| 229 { | |
| 230 public CaseInsensitive() | |
| 231 { | |
| 232 super(); | |
| 233 } | |
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234 |
| 1005 | 235 public CaseInsensitive(Buffer buffer, int mark, int get, int put, int access) |
| 236 { | |
| 237 super(buffer,mark,get,put,access); | |
| 238 } | |
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239 |
| 1005 | 240 public CaseInsensitive(Buffer buffer) |
| 241 { | |
| 242 super(buffer); | |
| 243 } | |
| 244 | |
| 245 @Override | |
| 246 public boolean equals(Object obj) | |
| 247 { | |
| 248 return this==obj ||((obj instanceof Buffer)&&((Buffer)obj).equalsIgnoreCase(this)) || super.equals(obj); | |
| 249 } | |
| 250 } | |
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251 } |