Stuart McCulloch | de5fbec | 2008-12-03 12:03:12 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * $Id: RepositoryImpl.java 44 2007-07-13 20:49:41Z hargrave@us.ibm.com $ |
| 3 | * |
| 4 | * Copyright (c) OSGi Alliance (2002, 2006, 2007). All Rights Reserved. |
| 5 | * |
| 6 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | */ |
| 18 | |
| 19 | package org.osgi.impl.bundle.obr.resource; |
| 20 | |
| 21 | import java.io.*; |
| 22 | import java.net.*; |
| 23 | import java.util.*; |
| 24 | import java.util.zip.*; |
| 25 | |
| 26 | import org.kxml2.io.KXmlParser; |
| 27 | import org.osgi.service.obr.*; |
| 28 | import org.xmlpull.v1.*; |
| 29 | |
| 30 | /** |
| 31 | * Implements the basic repository. A repository holds a set of resources. |
| 32 | * |
| 33 | * |
| 34 | * @version $Revision: 44 $ |
| 35 | */ |
| 36 | public class RepositoryImpl implements Repository { |
| 37 | transient Set resources = new HashSet(); |
| 38 | URL url; |
| 39 | String date; |
| 40 | Set visited = new HashSet(); |
| 41 | final static Resource[] EMPTY_RESOURCE = new Resource[0]; |
| 42 | String name = "Untitled"; |
| 43 | long lastModified; |
| 44 | Exception exception; |
| 45 | int ranking=0; |
| 46 | |
| 47 | /** |
| 48 | * Each repository is identified by a single URL. |
| 49 | * |
| 50 | * A repository can hold referrals to other repositories. These referred |
| 51 | * repositories are included at the point of referall. |
| 52 | * |
| 53 | * @param url |
| 54 | */ |
| 55 | public RepositoryImpl(URL url) { |
| 56 | this.url = url; |
| 57 | } |
| 58 | |
| 59 | /** |
| 60 | * Refresh the repository from the URL. |
| 61 | * |
| 62 | * @throws Exception |
| 63 | */ |
| 64 | public boolean refresh() { |
| 65 | exception = null; |
| 66 | try { |
| 67 | resources.clear(); |
| 68 | parseDocument(url); |
| 69 | visited = null; |
| 70 | return true; |
| 71 | } |
| 72 | catch (Exception e) { |
| 73 | e.printStackTrace(); |
| 74 | exception = e; |
| 75 | } |
| 76 | return false; |
| 77 | } |
| 78 | |
| 79 | /** |
| 80 | * Parse the repository. |
| 81 | * |
| 82 | * @param parser |
| 83 | * @throws Exception |
| 84 | */ |
| 85 | private void parseRepository(XmlPullParser parser) throws Exception { |
| 86 | try { |
| 87 | parser.require(XmlPullParser.START_DOCUMENT, null, null); |
| 88 | parser.nextTag(); |
| 89 | if (parser.getName().equals("bundles")) |
| 90 | parseOscar(parser); |
| 91 | else { |
| 92 | parser.require(XmlPullParser.START_TAG, null, "repository"); |
| 93 | date = parser.getAttributeValue(null, "lastmodified"); |
| 94 | name = parser.getAttributeValue(null, "name"); |
| 95 | if (name == null) |
| 96 | name = "Untitled"; |
| 97 | |
| 98 | while (parser.nextTag() == XmlPullParser.START_TAG) { |
| 99 | if (parser.getName().equals("resource")) { |
| 100 | ResourceImpl resource = new ResourceImpl(this, parser); |
| 101 | resources.add(resource); |
| 102 | } |
| 103 | else if (parser.getName().equals("referral")) |
| 104 | referral(parser); |
| 105 | else |
| 106 | throw new IllegalArgumentException( |
| 107 | "Invalid tag in repository: " + url + " " |
| 108 | + parser.getName()); |
| 109 | } |
| 110 | parser.require(XmlPullParser.END_TAG, null, "repository"); |
| 111 | } |
| 112 | } |
| 113 | catch (XmlPullParserException e) { |
| 114 | e.printStackTrace(); |
| 115 | throw new IllegalArgumentException("XML unregognized around: " |
| 116 | + e.getLineNumber() + " " + e.getMessage()); |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | /** |
| 121 | * Parse an old style OBR repository. |
| 122 | * |
| 123 | * <dtd-version>1.0</dtd-version> <repository> <name>Oscar Bundle |
| 124 | * Repository</name> <url>http://oscar-osgi.sourceforge.net/</url> |
| 125 | * <date>Fri May 07 16:45:07 CEST 2004</date> <extern-repositories> <!-- |
| 126 | * Stefano Lenzi (kismet@interfree.it) --> |
| 127 | * <url>http://domoware.isti.cnr.it/osgi-obr/niche-osgi-obr.xml</url> |
| 128 | * <!--Manuel Palencia (santillan@dit.upm.es) --> <!-- |
| 129 | * <url>http://jmood.forge.os4os.org/repository.xml</url> --> <!-- Enrique |
| 130 | * Rodriguez (erodriguez@apache.org) --> |
| 131 | * <url>http://update.cainenable.org/repository.xml</url> |
| 132 | * </extern-repositories> </repository> <bundle> <bundle-name>Bundle |
| 133 | * Repository</bundle-name> <bundle-description> A bundle repository |
| 134 | * service for Oscar. </bundle-description> <bundle-updatelocation> |
| 135 | * http://oscar-osgi.sf.net/repo/bundlerepository/bundlerepository.jar |
| 136 | * </bundle-updatelocation> <bundle-sourceurl> |
| 137 | * http://oscar-osgi.sf.net/repo/bundlerepository/bundlerepository-src.jar |
| 138 | * </bundle-sourceurl> <bundle-version>1.1.3</bundle-version> |
| 139 | * <bundle-docurl> http://oscar-osgi.sf.net/repo/bundlerepository/ |
| 140 | * </bundle-docurl> <bundle-category>General</bundle-category> |
| 141 | * <import-package package="org.osgi.framework"/> <export-package |
| 142 | * package="org.ungoverned.osgi.service.bundlerepository" |
| 143 | * specification-version="1.1.0"/> </bundle> * |
| 144 | */ |
| 145 | private void parseOscar(XmlPullParser parser) throws Exception { |
| 146 | parser.require(XmlPullParser.START_TAG, null, "bundles"); |
| 147 | while (true) { |
| 148 | int event = parser.next(); |
| 149 | |
| 150 | // Error .. |
| 151 | if (event == XmlPullParser.TEXT) |
| 152 | event = parser.next(); |
| 153 | |
| 154 | if (event != XmlPullParser.START_TAG) |
| 155 | break; |
| 156 | |
| 157 | ResourceImpl resource = new ResourceImpl(this); |
| 158 | |
| 159 | if (parser.getName().equals("bundle")) { |
| 160 | while (parser.nextTag() == XmlPullParser.START_TAG) { |
| 161 | String key = parser.getName(); |
| 162 | if (key.equals("import-package")) { |
| 163 | RequirementImpl requirement = new RequirementImpl( |
| 164 | "package"); |
| 165 | |
| 166 | requirement.setOptional(false); |
| 167 | requirement.setMultiple(false); |
| 168 | |
| 169 | String p = parser.getAttributeValue(null, "package"); |
| 170 | StringBuffer sb = new StringBuffer(); |
| 171 | sb.append("(&(package="); |
| 172 | sb.append(p); |
| 173 | sb.append(")"); |
| 174 | String version = parser.getAttributeValue(null, |
| 175 | "specification-version"); |
| 176 | VersionRange v = new VersionRange("0"); |
| 177 | if (version != null) { |
| 178 | sb.append("(version="); |
| 179 | sb.append(v= new VersionRange(version)); |
| 180 | sb.append(")"); |
| 181 | } |
| 182 | sb.append(")"); |
| 183 | requirement.setFilter(sb.toString()); |
| 184 | requirement.setComment("Import-Package: " + p + ";" + v ); |
| 185 | resource.addRequirement(requirement); |
| 186 | |
| 187 | parser.nextTag(); |
| 188 | } |
| 189 | else if (key.equals("export-package")) { |
| 190 | CapabilityImpl capability = new CapabilityImpl( |
| 191 | "package"); |
| 192 | capability.addProperty("package", parser |
| 193 | .getAttributeValue(null, "package")); |
| 194 | String version = parser.getAttributeValue(null, |
| 195 | "specification-version"); |
| 196 | if (version != null) { |
| 197 | capability.addProperty("version", new VersionRange( |
| 198 | version)); |
| 199 | } |
| 200 | resource.addCapability(capability); |
| 201 | parser.nextTag(); |
| 202 | } |
| 203 | else { |
| 204 | String value = parser.nextText().trim(); |
| 205 | if (key.equals("bundle-sourceurl")) |
| 206 | resource.setSource(new URL(value)); |
| 207 | else if (key.equals("bundle-docurl")) |
| 208 | resource.setDocumentation(new URL(value)); |
| 209 | else if (key.equals("bundle-updatelocation")) |
| 210 | resource.setURL(new URL(value)); |
| 211 | else if (key.equals("bundle-description")) |
| 212 | resource.setDescription(value); |
| 213 | else if (key.equals("bundle-category")) |
| 214 | resource.addCategory(value); |
| 215 | else if (key.equals("bundle-name")) { |
| 216 | resource.setName(value); |
| 217 | resource.setPresentationName(value); |
| 218 | } |
| 219 | else if (key.equals("bundle-version")) |
| 220 | resource.setVersion(new VersionRange(value)); |
| 221 | else { |
| 222 | resource.put(key, value); |
| 223 | } |
| 224 | } |
| 225 | } |
| 226 | resources.add(resource); |
| 227 | parser.require(XmlPullParser.END_TAG, null, "bundle"); |
| 228 | } |
| 229 | else if (parser.getName().equals("repository")) { |
| 230 | parser.require(XmlPullParser.START_TAG, null, "repository"); |
| 231 | while (parser.nextTag() == XmlPullParser.START_TAG) { |
| 232 | String tag = parser.getName(); |
| 233 | if (tag.equals("name")) { |
| 234 | String name = parser.nextText(); |
| 235 | if (this.name == null) |
| 236 | this.name = name.trim(); |
| 237 | } |
| 238 | else if (tag.equals("url")) |
| 239 | parser.nextText().trim(); |
| 240 | else if (tag.equals("date")) |
| 241 | parser.nextText().trim(); |
| 242 | else if (tag.equals("extern-repositories")) { |
| 243 | parser.require(XmlPullParser.START_TAG, null, |
| 244 | "extern-repositories"); |
| 245 | while (parser.nextTag() == XmlPullParser.START_TAG) { |
| 246 | if (parser.getName().equals("url")) |
| 247 | parseDocument(new URL(parser.nextText().trim())); |
| 248 | else |
| 249 | throw new IllegalArgumentException( |
| 250 | "Invalid tag in repository while parsing extern repositories: " |
| 251 | + url + " " + parser.getName()); |
| 252 | } |
| 253 | parser.require(XmlPullParser.END_TAG, null, |
| 254 | "extern-repositories"); |
| 255 | } |
| 256 | else |
| 257 | throw new IllegalArgumentException( |
| 258 | "Invalid tag in repository: " + url + " " |
| 259 | + parser.getName()); |
| 260 | } |
| 261 | parser.require(XmlPullParser.END_TAG, null, "repository"); |
| 262 | } |
| 263 | else if (parser.getName().equals("dtd-version")) { |
| 264 | parser.nextText(); |
| 265 | } |
| 266 | else |
| 267 | throw new IllegalArgumentException( |
| 268 | "Invalid tag in repository: " + url + " " |
| 269 | + parser.getName()); |
| 270 | } |
| 271 | parser.require(XmlPullParser.END_TAG, null, "bundles"); |
| 272 | } |
| 273 | |
| 274 | /** |
| 275 | * We have a referral to another repository. Just create another parser and |
| 276 | * read it inline. |
| 277 | * |
| 278 | * @param parser |
| 279 | */ |
| 280 | void referral(XmlPullParser parser) { |
| 281 | // TODO handle depth! |
| 282 | try { |
| 283 | parser.require(XmlPullParser.START_TAG, null, "referral"); |
| 284 | // String depth = parser.getAttributeValue(null, "depth"); |
| 285 | String path = parser.getAttributeValue(null, "url"); |
| 286 | URL url = new URL(this.url, path); |
| 287 | parseDocument(url); |
| 288 | parser.next(); |
| 289 | parser.require(XmlPullParser.END_TAG, null, "referral"); |
| 290 | } |
| 291 | catch (Exception e) { |
| 292 | e.printStackTrace(); |
| 293 | } |
| 294 | } |
| 295 | |
| 296 | /** |
| 297 | * Parse a repository document. |
| 298 | * |
| 299 | * @param url |
| 300 | * @throws IOException |
| 301 | * @throws XmlPullParserException |
| 302 | * @throws Exception |
| 303 | */ |
| 304 | void parseDocument(URL url) throws IOException, XmlPullParserException, |
| 305 | Exception { |
| 306 | if (!visited.contains(url)) { |
| 307 | visited.add(url); |
| 308 | try { |
| 309 | System.out.println("Visiting: " + url); |
| 310 | InputStream in = null; |
| 311 | |
| 312 | if ( url.getPath().endsWith(".zip")) { |
| 313 | ZipInputStream zin = new ZipInputStream( url.openStream() ); |
| 314 | ZipEntry entry = zin.getNextEntry(); |
| 315 | while ( entry != null ) { |
| 316 | if ( entry.getName().equals("repository.xml")) { |
| 317 | in = zin; |
| 318 | break; |
| 319 | } |
| 320 | entry = zin.getNextEntry(); |
| 321 | } |
| 322 | } else { |
| 323 | in = url.openStream(); |
| 324 | } |
| 325 | Reader reader = new InputStreamReader(in); |
| 326 | XmlPullParser parser = new KXmlParser(); |
| 327 | parser.setInput(reader); |
| 328 | parseRepository(parser); |
| 329 | } catch( MalformedURLException e ) { |
| 330 | System.out.println("Cannot create connection to url"); |
| 331 | } |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | public URL getURL() { |
| 336 | return url; |
| 337 | } |
| 338 | |
| 339 | /** |
| 340 | * @return |
| 341 | */ |
| 342 | public Collection getResourceList() { |
| 343 | return resources; |
| 344 | } |
| 345 | |
| 346 | public Resource[] getResources() { |
| 347 | return (Resource[]) getResourceList().toArray(EMPTY_RESOURCE); |
| 348 | } |
| 349 | |
| 350 | public String getName() { |
| 351 | return name; |
| 352 | } |
| 353 | |
| 354 | public Resource getResource(String id) { |
| 355 | for (Iterator i = getResourceList().iterator(); i.hasNext();) { |
| 356 | ResourceImpl resource = (ResourceImpl) i.next(); |
| 357 | if (resource.getId().equals(id)) |
| 358 | return resource; |
| 359 | } |
| 360 | return null; |
| 361 | } |
| 362 | |
| 363 | public long getLastModified() { |
| 364 | return lastModified; |
| 365 | } |
| 366 | |
| 367 | public int getRanking() { |
| 368 | return ranking; |
| 369 | } |
| 370 | |
| 371 | public void setRanking(int ranking) { |
| 372 | this.ranking = ranking; |
| 373 | } |
| 374 | |
| 375 | } |