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annotate src/org/eclipse/jetty/io/ByteArrayBuffer.java @ 1036:b87f97f6418a
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| author | Franklin Schmidt <fschmidt@gmail.com> |
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| date | Thu, 03 Nov 2016 21:42:41 -0600 |
| parents | 80cad9086593 |
| children | b71ad168fe34 |
| 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 import java.io.IOException; |
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22 import java.io.InputStream; |
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23 import java.io.OutputStream; |
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24 import java.io.UnsupportedEncodingException; |
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25 |
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26 import org.eclipse.jetty.util.StringUtil; |
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27 |
| 1018 | 28 |
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29 public class ByteArrayBuffer extends AbstractBuffer |
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30 { |
| 1010 | 31 // Set a maximum size to a write for the writeTo method, to ensure that very large content is not |
| 32 // written as a single write (which may fall foul to write timeouts if consumed slowly). | |
| 33 final static int MAX_WRITE=Integer.getInteger("org.eclipse.jetty.io.ByteArrayBuffer.MAX_WRITE",128*1024); | |
| 34 final protected byte[] _bytes; | |
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35 |
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36 protected ByteArrayBuffer(int size, int access) |
| 1010 | 37 { |
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38 this(new byte[size],0,0,access); |
| 1010 | 39 } |
| 40 | |
| 41 public ByteArrayBuffer(byte[] bytes) | |
| 42 { | |
| 43 this(bytes, 0, bytes.length, READWRITE); | |
| 44 } | |
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45 |
| 1010 | 46 public ByteArrayBuffer(byte[] bytes, int index, int length) |
| 47 { | |
| 48 this(bytes, index, length, READWRITE); | |
| 49 } | |
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50 |
| 1010 | 51 public ByteArrayBuffer(byte[] bytes, int index, int length, int access) |
| 52 { | |
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53 super(READWRITE); |
| 1010 | 54 _bytes = bytes; |
| 55 setPutIndex(index + length); | |
| 56 setGetIndex(index); | |
| 57 _access = access; | |
| 58 } | |
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59 |
| 1010 | 60 public ByteArrayBuffer(int size) |
| 61 { | |
| 62 this(new byte[size], 0, 0, READWRITE); | |
| 63 setPutIndex(0); | |
| 64 } | |
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65 |
| 1010 | 66 public ByteArrayBuffer(String value) |
| 67 { | |
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68 super(READWRITE); |
| 1010 | 69 _bytes = StringUtil.getBytes(value); |
| 70 setGetIndex(0); | |
| 71 setPutIndex(_bytes.length); | |
| 72 _access=IMMUTABLE; | |
| 73 _string = value; | |
| 74 } | |
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75 |
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76 @Override |
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77 public final byte[] array() |
| 1010 | 78 { |
| 79 return _bytes; | |
| 80 } | |
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81 |
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82 @Override |
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83 public final int capacity() |
| 1010 | 84 { |
| 85 return _bytes.length; | |
| 86 } | |
| 87 | |
| 88 @Override | |
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89 public final void compact() |
| 1010 | 90 { |
| 91 if (isReadOnly()) | |
| 92 throw new IllegalStateException(__READONLY); | |
| 93 int s = markIndex() >= 0 ? markIndex() : getIndex(); | |
| 94 if (s > 0) | |
| 95 { | |
| 96 int length = putIndex() - s; | |
| 97 if (length > 0) | |
| 98 { | |
| 99 System.arraycopy(_bytes, s,_bytes, 0, length); | |
| 100 } | |
| 101 if (markIndex() > 0) setMarkIndex(markIndex() - s); | |
| 102 setGetIndex(getIndex() - s); | |
| 103 setPutIndex(putIndex() - s); | |
| 104 } | |
| 105 } | |
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106 |
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107 |
| 1010 | 108 @Override |
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109 public final boolean equals(Object obj) |
| 1010 | 110 { |
| 111 if (obj==this) | |
| 112 return true; | |
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113 |
| 1010 | 114 if (obj == null || !(obj instanceof Buffer)) |
| 115 return false; | |
| 116 | |
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117 |
| 1010 | 118 Buffer b = (Buffer) obj; |
| 119 | |
| 120 // reject different lengths | |
| 121 if (b.length() != length()) | |
| 122 return false; | |
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123 |
| 1010 | 124 // reject AbstractBuffer with different hash value |
| 125 if (_hash != 0 && obj instanceof AbstractBuffer) | |
| 126 { | |
| 127 AbstractBuffer ab = (AbstractBuffer) obj; | |
| 128 if (ab._hash != 0 && _hash != ab._hash) | |
| 129 return false; | |
| 130 } | |
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131 |
| 1010 | 132 // Nothing for it but to do the hard grind. |
| 133 int get=getIndex(); | |
| 134 int bi=b.putIndex(); | |
| 135 for (int i = putIndex(); i-->get;) | |
| 136 { | |
| 137 byte b1 = _bytes[i]; | |
| 138 byte b2 = b.peek(--bi); | |
| 139 if (b1 != b2) return false; | |
| 140 } | |
| 141 return true; | |
| 142 } | |
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143 |
| 1010 | 144 @Override |
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145 public final byte get() |
| 1010 | 146 { |
| 147 return _bytes[_get++]; | |
| 148 } | |
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149 |
| 1010 | 150 @Override |
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151 public final int hashCode() |
| 1010 | 152 { |
| 153 if (_hash == 0 || _hashGet!=_get || _hashPut!=_put) | |
| 154 { | |
| 155 int get=getIndex(); | |
| 156 for (int i = putIndex(); i-- >get;) | |
| 157 { | |
| 158 byte b = _bytes[i]; | |
| 159 if ('a' <= b && b <= 'z') | |
| 160 b = (byte) (b - 'a' + 'A'); | |
| 161 _hash = 31 * _hash + b; | |
| 162 } | |
| 163 if (_hash == 0) | |
| 164 _hash = -1; | |
| 165 _hashGet=_get; | |
| 166 _hashPut=_put; | |
| 167 } | |
| 168 return _hash; | |
| 169 } | |
| 170 | |
| 171 | |
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172 @Override |
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173 public final byte peek(int index) |
| 1010 | 174 { |
| 175 return _bytes[index]; | |
| 176 } | |
| 177 | |
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178 @Override |
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179 public final int peek(int index, byte[] b, int offset, int length) |
| 1010 | 180 { |
| 181 int l = length; | |
| 182 if (index + l > capacity()) | |
| 183 { | |
| 184 l = capacity() - index; | |
| 185 if (l==0) | |
| 186 return -1; | |
| 187 } | |
| 188 | |
| 189 if (l < 0) | |
| 190 return -1; | |
| 191 | |
| 192 System.arraycopy(_bytes, index, b, offset, l); | |
| 193 return l; | |
| 194 } | |
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195 |
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196 @Override |
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197 public final void poke(int index, byte b) |
| 1010 | 198 { |
| 199 /* | |
| 200 if (isReadOnly()) | |
| 201 throw new IllegalStateException(__READONLY); | |
| 202 | |
| 203 if (index < 0) | |
| 204 throw new IllegalArgumentException("index<0: " + index + "<0"); | |
| 205 if (index > capacity()) | |
| 206 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity()); | |
| 207 */ | |
| 208 _bytes[index] = b; | |
| 209 } | |
| 210 | |
| 211 @Override | |
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212 public final int poke(int index, Buffer src) |
| 1010 | 213 { |
| 214 _hash=0; | |
| 215 | |
| 216 /* | |
| 217 if (isReadOnly()) | |
| 218 throw new IllegalStateException(__READONLY); | |
| 219 if (index < 0) | |
| 220 throw new IllegalArgumentException("index<0: " + index + "<0"); | |
| 221 */ | |
| 222 | |
| 223 int length=src.length(); | |
| 224 if (index + length > capacity()) | |
| 225 { | |
| 226 length=capacity()-index; | |
| 227 /* | |
| 228 if (length<0) | |
| 229 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity()); | |
| 230 */ | |
| 231 } | |
| 232 | |
| 233 byte[] src_array = src.array(); | |
| 234 if (src_array != null) | |
| 235 System.arraycopy(src_array, src.getIndex(), _bytes, index, length); | |
| 236 else | |
| 237 { | |
| 238 int s=src.getIndex(); | |
| 239 for (int i=0;i<length;i++) | |
| 240 _bytes[index++]=src.peek(s++); | |
| 241 } | |
| 242 | |
| 243 return length; | |
| 244 } | |
| 245 | |
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246 |
| 1010 | 247 @Override |
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248 public final int poke(int index, byte[] b, int offset, int length) |
| 1010 | 249 { |
| 250 _hash=0; | |
| 251 /* | |
| 252 if (isReadOnly()) | |
| 253 throw new IllegalStateException(__READONLY); | |
| 254 if (index < 0) | |
| 255 throw new IllegalArgumentException("index<0: " + index + "<0"); | |
| 256 */ | |
| 257 | |
| 258 if (index + length > capacity()) | |
| 259 { | |
| 260 length=capacity()-index; | |
| 261 /* if (length<0) | |
| 262 throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity()); | |
| 263 */ | |
| 264 } | |
| 265 | |
| 266 System.arraycopy(b, offset, _bytes, index, length); | |
| 267 | |
| 268 return length; | |
| 269 } | |
| 270 | |
| 271 @Override | |
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272 public final int readFrom(InputStream in,int max) throws IOException |
| 1010 | 273 { |
| 274 if (max<0||max>space()) | |
| 275 max=space(); | |
| 276 int p = putIndex(); | |
| 277 | |
| 278 int len=0, total=0, available=max; | |
| 279 while (total<max) | |
| 280 { | |
| 281 len=in.read(_bytes,p,available); | |
| 282 if (len<0) | |
| 283 break; | |
| 284 else if (len>0) | |
| 285 { | |
| 286 p += len; | |
| 287 total += len; | |
| 288 available -= len; | |
| 289 setPutIndex(p); | |
| 290 } | |
| 291 if (in.available()<=0) | |
| 292 break; | |
| 293 } | |
| 294 if (len<0 && total==0) | |
| 295 return -1; | |
| 296 return total; | |
| 297 } | |
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298 |
| 1010 | 299 @Override |
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300 public final int space() |
| 1010 | 301 { |
| 302 return _bytes.length - _put; | |
| 303 } | |
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304 |
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305 } |