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.util; |
| 20 | |
| 21 | import java.util.BitSet; |
| 22 | import java.util.HashMap; |
| 23 | import java.util.Map; |
| 24 | import java.util.StringTokenizer; |
| 25 | |
| 26 | |
| 27 | /* ------------------------------------------------------------ */ |
| 28 | /** |
| 29 | * Internet address map to object |
| 30 | * <p> |
| 31 | * Internet addresses may be specified as absolute address or as a combination of |
| 32 | * four octet wildcard specifications (a.b.c.d) that are defined as follows. |
| 33 | * </p> |
| 34 | * <pre> |
| 35 | * nnn - an absolute value (0-255) |
| 36 | * mmm-nnn - an inclusive range of absolute values, |
| 37 | * with following shorthand notations: |
| 38 | * nnn- => nnn-255 |
| 39 | * -nnn => 0-nnn |
| 40 | * - => 0-255 |
| 41 | * a,b,... - a list of wildcard specifications |
| 42 | * </pre> |
| 43 | */ |
| 44 | @SuppressWarnings("serial") |
| 45 | public class IPAddressMap<TYPE> extends HashMap<String, TYPE> |
| 46 | { |
| 47 | private final HashMap<String,IPAddrPattern> _patterns = new HashMap<String,IPAddrPattern>(); |
| 48 | |
| 49 | /* --------------------------------------------------------------- */ |
| 50 | /** Construct empty IPAddressMap. |
| 51 | */ |
| 52 | public IPAddressMap() |
| 53 | { |
| 54 | super(11); |
| 55 | } |
| 56 | |
| 57 | /* --------------------------------------------------------------- */ |
| 58 | /** Construct empty IPAddressMap. |
| 59 | * |
| 60 | * @param capacity initial capacity |
| 61 | */ |
| 62 | public IPAddressMap(int capacity) |
| 63 | { |
| 64 | super (capacity); |
| 65 | } |
| 66 | |
| 67 | /* ------------------------------------------------------------ */ |
| 68 | /** |
| 69 | * Insert a new internet address into map |
| 70 | * |
| 71 | * @see java.util.HashMap#put(java.lang.Object, java.lang.Object) |
| 72 | */ |
| 73 | @Override |
| 74 | public TYPE put(String addrSpec, TYPE object) |
| 75 | throws IllegalArgumentException |
| 76 | { |
| 77 | if (addrSpec == null || addrSpec.trim().length() == 0) |
| 78 | throw new IllegalArgumentException("Invalid IP address pattern: "+addrSpec); |
| 79 | |
| 80 | String spec = addrSpec.trim(); |
| 81 | if (_patterns.get(spec) == null) |
| 82 | _patterns.put(spec,new IPAddrPattern(spec)); |
| 83 | |
| 84 | return super.put(spec, object); |
| 85 | } |
| 86 | |
| 87 | /* ------------------------------------------------------------ */ |
| 88 | /** |
| 89 | * Retrieve the object mapped to the specified internet address literal |
| 90 | * |
| 91 | * @see java.util.HashMap#get(java.lang.Object) |
| 92 | */ |
| 93 | @Override |
| 94 | public TYPE get(Object key) |
| 95 | { |
| 96 | return super.get(key); |
| 97 | } |
| 98 | |
| 99 | /* ------------------------------------------------------------ */ |
| 100 | /** |
| 101 | * Retrieve the first object that is associated with the specified |
| 102 | * internet address by taking into account the wildcard specifications. |
| 103 | * |
| 104 | * @param addr internet address |
| 105 | * @return associated object |
| 106 | */ |
| 107 | public TYPE match(String addr) |
| 108 | { |
| 109 | Map.Entry<String, TYPE> entry = getMatch(addr); |
| 110 | return entry==null ? null : entry.getValue(); |
| 111 | } |
| 112 | |
| 113 | /* ------------------------------------------------------------ */ |
| 114 | /** |
| 115 | * Retrieve the first map entry that is associated with the specified |
| 116 | * internet address by taking into account the wildcard specifications. |
| 117 | * |
| 118 | * @param addr internet address |
| 119 | * @return map entry associated |
| 120 | */ |
| 121 | public Map.Entry<String, TYPE> getMatch(String addr) |
| 122 | { |
| 123 | if (addr != null) |
| 124 | { |
| 125 | for(Map.Entry<String, TYPE> entry: super.entrySet()) |
| 126 | { |
| 127 | if (_patterns.get(entry.getKey()).match(addr)) |
| 128 | { |
| 129 | return entry; |
| 130 | } |
| 131 | } |
| 132 | } |
| 133 | return null; |
| 134 | } |
| 135 | |
| 136 | /* ------------------------------------------------------------ */ |
| 137 | /** |
| 138 | * Retrieve a lazy list of map entries associated with specified |
| 139 | * internet address by taking into account the wildcard specifications. |
| 140 | * |
| 141 | * @param addr internet address |
| 142 | * @return lazy list of map entries |
| 143 | */ |
| 144 | public Object getLazyMatches(String addr) |
| 145 | { |
| 146 | if (addr == null) |
| 147 | return LazyList.getList(super.entrySet()); |
| 148 | |
| 149 | Object entries = null; |
| 150 | for(Map.Entry<String, TYPE> entry: super.entrySet()) |
| 151 | { |
| 152 | if (_patterns.get(entry.getKey()).match(addr)) |
| 153 | { |
| 154 | entries = LazyList.add(entries,entry); |
| 155 | } |
| 156 | } |
| 157 | return entries; |
| 158 | } |
| 159 | |
| 160 | /* ------------------------------------------------------------ */ |
| 161 | /** |
| 162 | * IPAddrPattern |
| 163 | * |
| 164 | * Represents internet address wildcard. |
| 165 | * Matches the wildcard to provided internet address. |
| 166 | */ |
| 167 | private static class IPAddrPattern |
| 168 | { |
| 169 | private final OctetPattern[] _octets = new OctetPattern[4]; |
| 170 | /* ------------------------------------------------------------ */ |
| 171 | /** |
| 172 | * Create new IPAddrPattern |
| 173 | * |
| 174 | * @param value internet address wildcard specification |
| 175 | * @throws IllegalArgumentException if wildcard specification is invalid |
| 176 | */ |
| 177 | public IPAddrPattern(String value) |
| 178 | throws IllegalArgumentException |
| 179 | { |
| 180 | if (value == null || value.trim().length() == 0) |
| 181 | throw new IllegalArgumentException("Invalid IP address pattern: "+value); |
| 182 | |
| 183 | try |
| 184 | { |
| 185 | StringTokenizer parts = new StringTokenizer(value, "."); |
| 186 | |
| 187 | String part; |
| 188 | for (int idx=0; idx<4; idx++) |
| 189 | { |
| 190 | part = parts.hasMoreTokens() ? parts.nextToken().trim() : "0-255"; |
| 191 | |
| 192 | int len = part.length(); |
| 193 | if (len == 0 && parts.hasMoreTokens()) |
| 194 | throw new IllegalArgumentException("Invalid IP address pattern: "+value); |
| 195 | |
| 196 | _octets[idx] = new OctetPattern(len==0 ? "0-255" : part); |
| 197 | } |
| 198 | } |
| 199 | catch (IllegalArgumentException ex) |
| 200 | { |
| 201 | throw new IllegalArgumentException("Invalid IP address pattern: "+value, ex); |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | /* ------------------------------------------------------------ */ |
| 206 | /** |
| 207 | * Match the specified internet address against the wildcard |
| 208 | * |
| 209 | * @param value internet address |
| 210 | * @return true if specified internet address matches wildcard specification |
| 211 | * |
| 212 | * @throws IllegalArgumentException if specified internet address is invalid |
| 213 | */ |
| 214 | public boolean match(String value) |
| 215 | throws IllegalArgumentException |
| 216 | { |
| 217 | if (value == null || value.trim().length() == 0) |
| 218 | throw new IllegalArgumentException("Invalid IP address: "+value); |
| 219 | |
| 220 | try |
| 221 | { |
| 222 | StringTokenizer parts = new StringTokenizer(value, "."); |
| 223 | |
| 224 | boolean result = true; |
| 225 | for (int idx=0; idx<4; idx++) |
| 226 | { |
| 227 | if (!parts.hasMoreTokens()) |
| 228 | throw new IllegalArgumentException("Invalid IP address: "+value); |
| 229 | |
| 230 | if (!(result &= _octets[idx].match(parts.nextToken()))) |
| 231 | break; |
| 232 | } |
| 233 | return result; |
| 234 | } |
| 235 | catch (IllegalArgumentException ex) |
| 236 | { |
| 237 | throw new IllegalArgumentException("Invalid IP address: "+value, ex); |
| 238 | } |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | /* ------------------------------------------------------------ */ |
| 243 | /** |
| 244 | * OctetPattern |
| 245 | * |
| 246 | * Represents a single octet wildcard. |
| 247 | * Matches the wildcard to the specified octet value. |
| 248 | */ |
| 249 | private static class OctetPattern extends BitSet |
| 250 | { |
| 251 | private final BitSet _mask = new BitSet(256); |
| 252 | |
| 253 | /* ------------------------------------------------------------ */ |
| 254 | /** |
| 255 | * Create new OctetPattern |
| 256 | * |
| 257 | * @param octetSpec octet wildcard specification |
| 258 | * @throws IllegalArgumentException if wildcard specification is invalid |
| 259 | */ |
| 260 | public OctetPattern(String octetSpec) |
| 261 | throws IllegalArgumentException |
| 262 | { |
| 263 | try |
| 264 | { |
| 265 | if (octetSpec != null) |
| 266 | { |
| 267 | String spec = octetSpec.trim(); |
| 268 | if(spec.length() == 0) |
| 269 | { |
| 270 | _mask.set(0,255); |
| 271 | } |
| 272 | else |
| 273 | { |
| 274 | StringTokenizer parts = new StringTokenizer(spec,","); |
| 275 | while (parts.hasMoreTokens()) |
| 276 | { |
| 277 | String part = parts.nextToken().trim(); |
| 278 | if (part.length() > 0) |
| 279 | { |
| 280 | if (part.indexOf('-') < 0) |
| 281 | { |
| 282 | Integer value = Integer.valueOf(part); |
| 283 | _mask.set(value); |
| 284 | } |
| 285 | else |
| 286 | { |
| 287 | int low = 0, high = 255; |
| 288 | |
| 289 | String[] bounds = part.split("-",-2); |
| 290 | if (bounds.length != 2) |
| 291 | { |
| 292 | throw new IllegalArgumentException("Invalid octet spec: "+octetSpec); |
| 293 | } |
| 294 | |
| 295 | if (bounds[0].length() > 0) |
| 296 | { |
| 297 | low = Integer.parseInt(bounds[0]); |
| 298 | } |
| 299 | if (bounds[1].length() > 0) |
| 300 | { |
| 301 | high = Integer.parseInt(bounds[1]); |
| 302 | } |
| 303 | |
| 304 | if (low > high) |
| 305 | { |
| 306 | throw new IllegalArgumentException("Invalid octet spec: "+octetSpec); |
| 307 | } |
| 308 | |
| 309 | _mask.set(low, high+1); |
| 310 | } |
| 311 | } |
| 312 | } |
| 313 | } |
| 314 | } |
| 315 | } |
| 316 | catch (NumberFormatException ex) |
| 317 | { |
| 318 | throw new IllegalArgumentException("Invalid octet spec: "+octetSpec, ex); |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | /* ------------------------------------------------------------ */ |
| 323 | /** |
| 324 | * Match specified octet value against the wildcard |
| 325 | * |
| 326 | * @param value octet value |
| 327 | * @return true if specified octet value matches the wildcard |
| 328 | * @throws IllegalArgumentException if specified octet value is invalid |
| 329 | */ |
| 330 | public boolean match(String value) |
| 331 | throws IllegalArgumentException |
| 332 | { |
| 333 | if (value == null || value.trim().length() == 0) |
| 334 | throw new IllegalArgumentException("Invalid octet: "+value); |
| 335 | |
| 336 | try |
| 337 | { |
| 338 | int number = Integer.parseInt(value); |
| 339 | return match(number); |
| 340 | } |
| 341 | catch (NumberFormatException ex) |
| 342 | { |
| 343 | throw new IllegalArgumentException("Invalid octet: "+value); |
| 344 | } |
| 345 | } |
| 346 | |
| 347 | /* ------------------------------------------------------------ */ |
| 348 | /** |
| 349 | * Match specified octet value against the wildcard |
| 350 | * |
| 351 | * @param number octet value |
| 352 | * @return true if specified octet value matches the wildcard |
| 353 | * @throws IllegalArgumentException if specified octet value is invalid |
| 354 | */ |
| 355 | public boolean match(int number) |
| 356 | throws IllegalArgumentException |
| 357 | { |
| 358 | if (number < 0 || number > 255) |
| 359 | throw new IllegalArgumentException("Invalid octet: "+number); |
| 360 | |
| 361 | return _mask.get(number); |
| 362 | } |
| 363 | } |
| 364 | } |