Stuart McCulloch | 26e7a5a | 2011-10-17 10:31:43 +0000 | [diff] [blame] | 1 | package aQute.lib.deployer.obr; |
| 2 | |
| 3 | import java.io.File; |
| 4 | import java.io.FileNotFoundException; |
| 5 | import java.io.IOException; |
| 6 | import java.io.InputStream; |
| 7 | import java.net.MalformedURLException; |
| 8 | import java.net.URL; |
| 9 | import java.util.ArrayList; |
| 10 | import java.util.Collection; |
| 11 | import java.util.Collections; |
| 12 | import java.util.Dictionary; |
| 13 | import java.util.EnumSet; |
| 14 | import java.util.HashMap; |
| 15 | import java.util.Hashtable; |
| 16 | import java.util.Iterator; |
| 17 | import java.util.LinkedList; |
| 18 | import java.util.List; |
| 19 | import java.util.Map; |
| 20 | import java.util.Map.Entry; |
| 21 | import java.util.Properties; |
| 22 | import java.util.Set; |
| 23 | import java.util.SortedMap; |
| 24 | import java.util.StringTokenizer; |
| 25 | import java.util.TreeMap; |
| 26 | import java.util.regex.Pattern; |
| 27 | |
| 28 | import javax.xml.parsers.ParserConfigurationException; |
| 29 | import javax.xml.parsers.SAXParser; |
| 30 | import javax.xml.parsers.SAXParserFactory; |
| 31 | |
| 32 | import org.xml.sax.SAXException; |
| 33 | |
| 34 | import aQute.bnd.build.ResolverMode; |
| 35 | import aQute.bnd.service.OBRIndexProvider; |
| 36 | import aQute.bnd.service.OBRResolutionMode; |
| 37 | import aQute.bnd.service.Plugin; |
| 38 | import aQute.bnd.service.Registry; |
| 39 | import aQute.bnd.service.RegistryPlugin; |
| 40 | import aQute.bnd.service.RemoteRepositoryPlugin; |
| 41 | import aQute.bnd.service.ResourceHandle; |
| 42 | import aQute.bnd.service.ResourceHandle.Location; |
| 43 | import aQute.lib.filter.Filter; |
| 44 | import aQute.lib.osgi.Jar; |
| 45 | import aQute.libg.generics.Create; |
| 46 | import aQute.libg.reporter.Reporter; |
| 47 | import aQute.libg.version.Version; |
| 48 | import aQute.libg.version.VersionRange; |
| 49 | |
| 50 | /** |
| 51 | * Abstract base class for OBR-based repositories. |
| 52 | * |
| 53 | * <p> |
| 54 | * The repository implementation is read-only by default. To implement a writable |
| 55 | * repository, subclasses should override {@link #canWrite()} and {@link #put(Jar)}. |
| 56 | * |
| 57 | * @author Neil Bartlett |
| 58 | * |
| 59 | */ |
| 60 | public abstract class AbstractBaseOBR implements RegistryPlugin, Plugin, RemoteRepositoryPlugin, OBRIndexProvider { |
| 61 | |
| 62 | public static final String PROP_NAME = "name"; |
| 63 | public static final String PROP_RESOLUTION_MODE = "mode"; |
| 64 | public static final String PROP_RESOLUTION_MODE_ANY = "any"; |
| 65 | |
| 66 | public static final String REPOSITORY_FILE_NAME = "repository.xml"; |
| 67 | |
| 68 | protected Registry registry; |
| 69 | protected Reporter reporter; |
| 70 | protected String name = this.getClass().getName(); |
| 71 | protected Set<OBRResolutionMode> supportedModes = EnumSet.allOf(OBRResolutionMode.class); |
| 72 | |
| 73 | private boolean initialised = false; |
| 74 | private final Map<String, SortedMap<Version, Resource>> pkgResourceMap = new HashMap<String, SortedMap<Version, Resource>>(); |
| 75 | private final Map<String, SortedMap<Version, Resource>> bsnMap = new HashMap<String, SortedMap<Version, Resource>>(); |
| 76 | |
| 77 | protected abstract File getCacheDirectory(); |
| 78 | |
| 79 | protected void addResourceToIndex(Resource resource) { |
| 80 | addBundleSymbolicNameToIndex(resource); |
| 81 | addPackagesToIndex(resource); |
| 82 | } |
| 83 | |
| 84 | protected synchronized void reset() { |
| 85 | initialised = false; |
| 86 | } |
| 87 | |
| 88 | /** |
| 89 | * Initialise the indexes prior to main initialisation of internal |
| 90 | * data structures. This implementation does nothing, but subclasses |
| 91 | * may override if they need to perform such initialisation. |
| 92 | * @throws Exception |
| 93 | */ |
| 94 | protected void initialiseIndexes() throws Exception { |
| 95 | } |
| 96 | |
| 97 | protected final synchronized void init() throws Exception { |
| 98 | if (!initialised) { |
| 99 | bsnMap.clear(); |
| 100 | pkgResourceMap.clear(); |
| 101 | |
| 102 | initialiseIndexes(); |
| 103 | |
| 104 | IResourceListener listener = new IResourceListener() { |
| 105 | public boolean processResource(Resource resource) { |
| 106 | addResourceToIndex(resource); |
| 107 | return true; |
| 108 | } |
| 109 | }; |
| 110 | Collection<URL> indexes = getOBRIndexes(); |
| 111 | for (URL indexLocation : indexes) { |
| 112 | try { |
| 113 | InputStream stream = indexLocation.openStream(); |
| 114 | readIndex(indexLocation.toString(), stream, listener); |
| 115 | } catch (Exception e) { |
| 116 | e.printStackTrace(); |
| 117 | reporter.error("Unable to read index at URL '%s'.", indexLocation); |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | initialised = true; |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | public void setRegistry(Registry registry) { |
| 126 | this.registry = registry; |
| 127 | } |
| 128 | |
| 129 | public void setProperties(Map<String, String> map) { |
| 130 | if (map.containsKey(PROP_NAME)) |
| 131 | name = map.get(PROP_NAME); |
| 132 | |
| 133 | if (map.containsKey(PROP_RESOLUTION_MODE)) { |
| 134 | supportedModes = EnumSet.noneOf(OBRResolutionMode.class); |
| 135 | StringTokenizer tokenizer = new StringTokenizer(map.get(PROP_RESOLUTION_MODE), ","); |
| 136 | while (tokenizer.hasMoreTokens()) { |
| 137 | String token = tokenizer.nextToken().trim(); |
| 138 | if (PROP_RESOLUTION_MODE_ANY.equalsIgnoreCase(token)) |
| 139 | supportedModes = EnumSet.allOf(OBRResolutionMode.class); |
| 140 | else { |
| 141 | try { |
| 142 | supportedModes.add(OBRResolutionMode.valueOf(token)); |
| 143 | } catch (Exception e) { |
| 144 | if (reporter != null) reporter.error("Unknown OBR resolution mode: " + token); |
| 145 | } |
| 146 | } |
| 147 | } |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | public File[] get(String bsn, String range) throws Exception { |
| 152 | ResourceHandle[] handles = getHandles(bsn, range); |
| 153 | |
| 154 | return requestAll(handles); |
| 155 | } |
| 156 | |
| 157 | protected static File[] requestAll(ResourceHandle[] handles) throws IOException { |
| 158 | File[] result = (handles == null) ? new File[0] : new File[handles.length]; |
| 159 | for (int i = 0; i < result.length; i++) { |
| 160 | result[i] = handles[i].request(); |
| 161 | } |
| 162 | return result; |
| 163 | } |
| 164 | |
| 165 | protected ResourceHandle[] getHandles(String bsn, String rangeStr) throws Exception { |
| 166 | init(); |
| 167 | |
| 168 | // If the range is set to "project", we cannot resolve it. |
| 169 | if ("project".equals(rangeStr)) |
| 170 | return null; |
| 171 | |
| 172 | |
| 173 | SortedMap<Version, Resource> versionMap = bsnMap.get(bsn); |
| 174 | if (versionMap == null || versionMap.isEmpty()) |
| 175 | return null; |
| 176 | List<Resource> resources = narrowVersionsByVersionRange(versionMap, rangeStr); |
| 177 | List<ResourceHandle> handles = mapResourcesToHandles(resources); |
| 178 | |
| 179 | return (ResourceHandle[]) handles.toArray(new ResourceHandle[handles.size()]); |
| 180 | } |
| 181 | |
| 182 | public void setReporter(Reporter reporter) { |
| 183 | this.reporter = reporter; |
| 184 | } |
| 185 | |
| 186 | public File get(String bsn, String range, Strategy strategy, Map<String, String> properties) throws Exception { |
| 187 | ResourceHandle handle = getHandle(bsn, range, strategy, properties); |
| 188 | return handle != null ? handle.request() : null; |
| 189 | } |
| 190 | |
| 191 | public ResourceHandle getHandle(String bsn, String range, Strategy strategy, Map<String, String> properties) throws Exception { |
| 192 | ResourceHandle result; |
| 193 | if (bsn != null) |
| 194 | result = resolveBundle(bsn, range, strategy); |
| 195 | else { |
| 196 | String pkgName = properties.get(CapabilityType.PACKAGE.getTypeName()); |
| 197 | |
| 198 | String modeName = properties.get(CapabilityType.MODE.getTypeName()); |
| 199 | ResolverMode mode = (modeName != null) ? ResolverMode.valueOf(modeName) : null; |
| 200 | |
| 201 | if (pkgName != null) |
| 202 | result = resolvePackage(pkgName, range, strategy, mode, properties); |
| 203 | else |
| 204 | throw new IllegalArgumentException("Cannot resolve bundle: neither bsn nor package specified."); |
| 205 | } |
| 206 | return result; |
| 207 | } |
| 208 | |
| 209 | public boolean canWrite() { |
| 210 | return false; |
| 211 | } |
| 212 | |
| 213 | public File put(Jar jar) throws Exception { |
| 214 | throw new UnsupportedOperationException("Read-only repository."); |
| 215 | } |
| 216 | |
| 217 | public List<String> list(String regex) throws Exception { |
| 218 | init(); |
| 219 | Pattern pattern = regex != null ? Pattern.compile(regex) : null; |
| 220 | List<String> result = new LinkedList<String>(); |
| 221 | |
| 222 | for (String bsn : bsnMap.keySet()) { |
| 223 | if (pattern == null || pattern.matcher(bsn).matches()) |
| 224 | result.add(bsn); |
| 225 | } |
| 226 | |
| 227 | return result; |
| 228 | } |
| 229 | |
| 230 | public List<Version> versions(String bsn) throws Exception { |
| 231 | init(); |
| 232 | SortedMap<Version, Resource> versionMap = bsnMap.get(bsn); |
| 233 | List<Version> list; |
| 234 | if (versionMap != null) { |
| 235 | list = new ArrayList<Version>(versionMap.size()); |
| 236 | list.addAll(versionMap.keySet()); |
| 237 | } else { |
| 238 | list = Collections.emptyList(); |
| 239 | } |
| 240 | return list; |
| 241 | } |
| 242 | |
| 243 | public String getName() { |
| 244 | return name; |
| 245 | } |
| 246 | |
| 247 | void addBundleSymbolicNameToIndex(Resource resource) { |
| 248 | String bsn = resource.getSymbolicName(); |
| 249 | Version version; |
| 250 | String versionStr = resource.getVersion(); |
| 251 | try { |
| 252 | version = new Version(versionStr); |
| 253 | } catch (Exception e) { |
| 254 | version = new Version("0.0.0"); |
| 255 | } |
| 256 | SortedMap<Version, Resource> versionMap = bsnMap.get(bsn); |
| 257 | if (versionMap == null) { |
| 258 | versionMap = new TreeMap<Version, Resource>(); |
| 259 | bsnMap.put(bsn, versionMap); |
| 260 | } |
| 261 | versionMap.put(version, resource); |
| 262 | } |
| 263 | |
| 264 | void addPackagesToIndex(Resource resource) { |
| 265 | for (Capability capability : resource.getCapabilities()) { |
| 266 | if (CapabilityType.PACKAGE.getTypeName().equals(capability.getName())) { |
| 267 | String pkgName = null; |
| 268 | String versionStr = null; |
| 269 | |
| 270 | for (Property prop : capability.getProperties()) { |
| 271 | if (Property.PACKAGE.equals(prop.getName())) |
| 272 | pkgName = prop.getValue(); |
| 273 | else if (Property.VERSION.equals(prop.getName())) |
| 274 | versionStr = prop.getValue(); |
| 275 | } |
| 276 | |
| 277 | Version version; |
| 278 | try { |
| 279 | version = new Version(versionStr); |
| 280 | } catch (Exception e) { |
| 281 | version = new Version("0.0.0"); |
| 282 | } |
| 283 | |
| 284 | if (pkgName != null) { |
| 285 | SortedMap<Version, Resource> versionMap = pkgResourceMap.get(pkgName); |
| 286 | if (versionMap == null) { |
| 287 | versionMap = new TreeMap<Version, Resource>(); |
| 288 | pkgResourceMap.put(pkgName, versionMap); |
| 289 | } |
| 290 | versionMap.put(version, resource); |
| 291 | } |
| 292 | } |
| 293 | } |
| 294 | } |
| 295 | |
| 296 | /** |
| 297 | * @return Whether to continue parsing other indexes |
| 298 | * @throws IOException |
| 299 | */ |
| 300 | boolean readIndex(String baseUrl, InputStream stream, IResourceListener listener) throws ParserConfigurationException, SAXException, IOException { |
| 301 | SAXParserFactory parserFactory = SAXParserFactory.newInstance(); |
| 302 | SAXParser parser = parserFactory.newSAXParser(); |
| 303 | try { |
| 304 | parser.parse(stream, new OBRSAXHandler(baseUrl, listener)); |
| 305 | return true; |
| 306 | } catch (StopParseException e) { |
| 307 | return false; |
| 308 | } finally { |
| 309 | stream.close(); |
| 310 | } |
| 311 | } |
| 312 | |
| 313 | List<Resource> narrowVersionsByFilter(String pkgName, SortedMap<Version, Resource> versionMap, Filter filter) { |
| 314 | List<Resource> result = new ArrayList<Resource>(versionMap.size()); |
| 315 | |
| 316 | Dictionary<String, String> dict = new Hashtable<String, String>(); |
| 317 | dict.put("package", pkgName); |
| 318 | |
| 319 | for (Version version : versionMap.keySet()) { |
| 320 | dict.put("version", version.toString()); |
| 321 | if (filter.match(dict)) |
| 322 | result.add(versionMap.get(version)); |
| 323 | } |
| 324 | |
| 325 | return result; |
| 326 | } |
| 327 | |
| 328 | List<Resource> narrowVersionsByVersionRange(SortedMap<Version, Resource> versionMap, String rangeStr) { |
| 329 | List<Resource> result; |
| 330 | if ("latest".equals(rangeStr)) { |
| 331 | Version highest = versionMap.lastKey(); |
| 332 | result = Create.list(new Resource[] { versionMap.get(highest) }); |
| 333 | } else { |
| 334 | VersionRange range = rangeStr != null ? new VersionRange(rangeStr) : null; |
| 335 | |
| 336 | // optimisation: skip versions definitely less than the range |
| 337 | if (range != null && range.getLow() != null) |
| 338 | versionMap = versionMap.tailMap(range.getLow()); |
| 339 | |
| 340 | result = new ArrayList<Resource>(versionMap.size()); |
| 341 | for (Version version : versionMap.keySet()) { |
| 342 | if (range == null || range.includes(version)) |
| 343 | result.add(versionMap.get(version)); |
| 344 | |
| 345 | // optimisation: skip versions definitely higher than the range |
| 346 | if (range != null && range.isRange() && version.compareTo(range.getHigh()) >= 0) |
| 347 | break; |
| 348 | } |
| 349 | } |
| 350 | return result; |
| 351 | } |
| 352 | |
| 353 | void filterResourcesByResolverMode(Collection<Resource> resources, ResolverMode mode) { |
| 354 | assert mode != null; |
| 355 | |
| 356 | Properties modeCapability = new Properties(); |
| 357 | modeCapability.setProperty(CapabilityType.MODE.getTypeName(), mode.name()); |
| 358 | |
| 359 | for (Iterator<Resource> iter = resources.iterator(); iter.hasNext(); ) { |
| 360 | Resource resource = iter.next(); |
| 361 | |
| 362 | Require modeRequire = resource.findRequire(CapabilityType.MODE.getTypeName()); |
| 363 | if (modeRequire == null) |
| 364 | continue; |
| 365 | else if (modeRequire.getFilter() == null) |
| 366 | iter.remove(); |
| 367 | else { |
| 368 | try { |
| 369 | Filter filter = new Filter(modeRequire.getFilter()); |
| 370 | if (!filter.match(modeCapability)) |
| 371 | iter.remove(); |
| 372 | } catch (IllegalArgumentException e) { |
| 373 | if (reporter != null) |
| 374 | reporter.error("Error parsing mode filter requirement on resource %s: %s", resource.getUrl(), modeRequire.getFilter()); |
| 375 | iter.remove(); |
| 376 | } |
| 377 | } |
| 378 | } |
| 379 | } |
| 380 | |
| 381 | List<ResourceHandle> mapResourcesToHandles(Collection<Resource> resources) throws Exception { |
| 382 | List<ResourceHandle> result = new ArrayList<ResourceHandle>(resources.size()); |
| 383 | |
| 384 | for (Resource resource : resources) { |
| 385 | ResourceHandle handle = mapResourceToHandle(resource); |
| 386 | if (handle != null) |
| 387 | result.add(handle); |
| 388 | } |
| 389 | |
| 390 | return result; |
| 391 | } |
| 392 | |
| 393 | ResourceHandle mapResourceToHandle(Resource resource) throws Exception { |
| 394 | ResourceHandle result = null; |
| 395 | |
| 396 | URLResourceHandle handle ; |
| 397 | try { |
| 398 | handle = new URLResourceHandle(resource.getUrl(), resource.getBaseUrl(), getCacheDirectory()); |
| 399 | } catch (FileNotFoundException e) { |
| 400 | throw new FileNotFoundException("Broken link in repository index: " + e.getMessage()); |
| 401 | } |
| 402 | if (handle.getLocation() == Location.local || getCacheDirectory() != null) |
| 403 | result = handle; |
| 404 | |
| 405 | return result; |
| 406 | } |
| 407 | |
| 408 | ResourceHandle resolveBundle(String bsn, String rangeStr, Strategy strategy) throws Exception { |
| 409 | if (rangeStr == null) rangeStr = "0.0.0"; |
| 410 | |
| 411 | if (strategy == Strategy.EXACT) { |
| 412 | return findExactMatch(bsn, rangeStr, bsnMap); |
| 413 | } |
| 414 | |
| 415 | ResourceHandle[] handles = getHandles(bsn, rangeStr); |
| 416 | ResourceHandle selected; |
| 417 | if (handles == null || handles.length == 0) |
| 418 | selected = null; |
| 419 | else { |
| 420 | switch(strategy) { |
| 421 | case LOWEST: |
| 422 | selected = handles[0]; |
| 423 | break; |
| 424 | default: |
| 425 | selected = handles[handles.length - 1]; |
| 426 | } |
| 427 | } |
| 428 | return selected; |
| 429 | } |
| 430 | |
| 431 | ResourceHandle resolvePackage(String pkgName, String rangeStr, Strategy strategy, ResolverMode mode, Map<String, String> props) throws Exception { |
| 432 | init(); |
| 433 | if (rangeStr == null) rangeStr = "0.0.0"; |
| 434 | |
| 435 | SortedMap<Version, Resource> versionMap = pkgResourceMap.get(pkgName); |
| 436 | if (versionMap == null) |
| 437 | return null; |
| 438 | |
| 439 | // Was a filter expression supplied? |
| 440 | Filter filter = null; |
| 441 | String filterStr = props.get("filter"); |
| 442 | if (filterStr != null) { |
| 443 | filter = new Filter(filterStr); |
| 444 | } |
| 445 | |
| 446 | // Narrow the resources by version range string or filter. |
| 447 | List<Resource> resources; |
| 448 | if (filter != null) |
| 449 | resources = narrowVersionsByFilter(pkgName, versionMap, filter); |
| 450 | else |
| 451 | resources = narrowVersionsByVersionRange(versionMap, rangeStr); |
| 452 | |
| 453 | // Remove resources that are invalid for the current resolution mode |
| 454 | if (mode != null) |
| 455 | filterResourcesByResolverMode(resources, mode); |
| 456 | |
| 457 | // Select the most suitable one |
| 458 | Resource selected; |
| 459 | if (resources == null || resources.isEmpty()) |
| 460 | selected = null; |
| 461 | else { |
| 462 | switch (strategy) { |
| 463 | case LOWEST: |
| 464 | selected = resources.get(0); |
| 465 | break; |
| 466 | default: |
| 467 | selected = resources.get(resources.size() - 1); |
| 468 | } |
| 469 | expandPackageUses(pkgName, selected, props); |
| 470 | } |
| 471 | return selected != null ? mapResourceToHandle(selected) : null; |
| 472 | } |
| 473 | |
| 474 | void expandPackageUses(String pkgName, Resource resource, Map<String, String> props) { |
| 475 | List<String> internalUses = new LinkedList<String>(); |
| 476 | Map<String, Require> externalUses = new HashMap<String, Require>(); |
| 477 | |
| 478 | internalUses.add(pkgName); |
| 479 | |
| 480 | Capability capability = resource.findPackageCapability(pkgName); |
| 481 | Property usesProp = capability.findProperty(Property.USES); |
| 482 | if (usesProp != null) { |
| 483 | StringTokenizer tokenizer = new StringTokenizer(usesProp.getValue(), ","); |
| 484 | while (tokenizer.hasMoreTokens()) { |
| 485 | String usesPkgName = tokenizer.nextToken(); |
| 486 | Capability usesPkgCap = resource.findPackageCapability(usesPkgName); |
| 487 | if (usesPkgCap != null) |
| 488 | internalUses.add(usesPkgName); |
| 489 | else { |
| 490 | Require require = resource.findPackageRequire(usesPkgName); |
| 491 | if (require != null) |
| 492 | externalUses.put(usesPkgName, require); |
| 493 | } |
| 494 | } |
| 495 | } |
| 496 | props.put("packages", listToString(internalUses)); |
| 497 | props.put("import-uses", formatPackageRequires(externalUses)); |
| 498 | } |
| 499 | |
| 500 | String listToString(List<?> list) { |
| 501 | StringBuilder builder = new StringBuilder(); |
| 502 | |
| 503 | int count = 0; |
| 504 | for (Object item : list) { |
| 505 | if (count++ > 0) builder.append(','); |
| 506 | builder.append(item); |
| 507 | } |
| 508 | |
| 509 | return builder.toString(); |
| 510 | } |
| 511 | |
| 512 | String formatPackageRequires(Map<String, Require> externalUses) { |
| 513 | StringBuilder builder = new StringBuilder(); |
| 514 | |
| 515 | int count = 0; |
| 516 | for (Entry<String, Require> entry : externalUses.entrySet()) { |
| 517 | String pkgName = entry.getKey(); |
| 518 | String filter = entry.getValue().getFilter(); |
| 519 | |
| 520 | if (count++ > 0) |
| 521 | builder.append(','); |
| 522 | builder.append(pkgName); |
| 523 | builder.append(";filter='"); |
| 524 | builder.append(filter); |
| 525 | builder.append('\''); |
| 526 | } |
| 527 | |
| 528 | return builder.toString(); |
| 529 | } |
| 530 | |
| 531 | ResourceHandle findExactMatch(String identity, String version, Map<String, SortedMap<Version, Resource>> resourceMap) throws Exception { |
| 532 | Resource resource; |
| 533 | VersionRange range = new VersionRange(version); |
| 534 | if (range.isRange()) |
| 535 | return null; |
| 536 | |
| 537 | SortedMap<Version, Resource> versions = resourceMap.get(identity); |
| 538 | resource = versions.get(range.getLow()); |
| 539 | |
| 540 | return mapResourceToHandle(resource); |
| 541 | } |
| 542 | |
| 543 | /** |
| 544 | * Utility function for parsing lists of URLs. |
| 545 | * |
| 546 | * @param locationsStr |
| 547 | * Comma-separated list of URLs |
| 548 | * @throws MalformedURLException |
| 549 | */ |
| 550 | protected static List<URL> parseLocations(String locationsStr) throws MalformedURLException { |
| 551 | StringTokenizer tok = new StringTokenizer(locationsStr, ","); |
| 552 | List<URL> urls = new ArrayList<URL>(tok.countTokens()); |
| 553 | while (tok.hasMoreTokens()) { |
| 554 | String urlStr = tok.nextToken().trim(); |
| 555 | urls.add(new URL(urlStr)); |
| 556 | } |
| 557 | return urls; |
| 558 | } |
| 559 | |
| 560 | public Set<OBRResolutionMode> getSupportedModes() { |
| 561 | return supportedModes; |
| 562 | } |
| 563 | |
| 564 | } |