J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2002-2007 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package javax.management.remote; |
| 27 | |
| 28 | import com.sun.jmx.mbeanserver.Util; |
| 29 | import java.io.IOException; |
| 30 | import java.net.MalformedURLException; |
| 31 | import java.util.Collections; |
| 32 | import java.util.HashMap; |
| 33 | import java.util.Map; |
| 34 | import java.util.Iterator; |
| 35 | import java.util.ServiceLoader; |
| 36 | import java.util.StringTokenizer; |
| 37 | import java.security.AccessController; |
| 38 | import java.security.PrivilegedAction; |
| 39 | |
| 40 | import com.sun.jmx.remote.util.ClassLogger; |
| 41 | import com.sun.jmx.remote.util.EnvHelp; |
| 42 | |
| 43 | |
| 44 | /** |
| 45 | * <p>Factory to create JMX API connector clients. There |
| 46 | * are no instances of this class.</p> |
| 47 | * |
| 48 | * <p>Connections are usually made using the {@link |
| 49 | * #connect(JMXServiceURL) connect} method of this class. More |
| 50 | * advanced applications can separate the creation of the connector |
| 51 | * client, using {@link #newJMXConnector(JMXServiceURL, Map) |
| 52 | * newJMXConnector} and the establishment of the connection itself, using |
| 53 | * {@link JMXConnector#connect(Map)}.</p> |
| 54 | * |
| 55 | * <p>Each client is created by an instance of {@link |
| 56 | * JMXConnectorProvider}. This instance is found as follows. Suppose |
| 57 | * the given {@link JMXServiceURL} looks like |
| 58 | * <code>"service:jmx:<em>protocol</em>:<em>remainder</em>"</code>. |
| 59 | * Then the factory will attempt to find the appropriate {@link |
| 60 | * JMXConnectorProvider} for <code><em>protocol</em></code>. Each |
| 61 | * occurrence of the character <code>+</code> or <code>-</code> in |
| 62 | * <code><em>protocol</em></code> is replaced by <code>.</code> or |
| 63 | * <code>_</code>, respectively.</p> |
| 64 | * |
| 65 | * <p>A <em>provider package list</em> is searched for as follows:</p> |
| 66 | * |
| 67 | * <ol> |
| 68 | * |
| 69 | * <li>If the <code>environment</code> parameter to {@link |
| 70 | * #newJMXConnector(JMXServiceURL, Map) newJMXConnector} contains the |
| 71 | * key <code>jmx.remote.protocol.provider.pkgs</code> then the |
| 72 | * associated value is the provider package list. |
| 73 | * |
| 74 | * <li>Otherwise, if the system property |
| 75 | * <code>jmx.remote.protocol.provider.pkgs</code> exists, then its value |
| 76 | * is the provider package list. |
| 77 | * |
| 78 | * <li>Otherwise, there is no provider package list. |
| 79 | * |
| 80 | * </ol> |
| 81 | * |
| 82 | * <p>The provider package list is a string that is interpreted as a |
| 83 | * list of non-empty Java package names separated by vertical bars |
| 84 | * (<code>|</code>). If the string is empty, then so is the provider |
| 85 | * package list. If the provider package list is not a String, or if |
| 86 | * it contains an element that is an empty string, a {@link |
| 87 | * JMXProviderException} is thrown.</p> |
| 88 | * |
| 89 | * <p>If the provider package list exists and is not empty, then for |
| 90 | * each element <code><em>pkg</em></code> of the list, the factory |
| 91 | * will attempt to load the class |
| 92 | * |
| 93 | * <blockquote> |
| 94 | * <code><em>pkg</em>.<em>protocol</em>.ClientProvider</code> |
| 95 | * </blockquote> |
| 96 | |
| 97 | * <p>If the <code>environment</code> parameter to {@link |
| 98 | * #newJMXConnector(JMXServiceURL, Map) newJMXConnector} contains the |
| 99 | * key <code>jmx.remote.protocol.provider.class.loader</code> then the |
| 100 | * associated value is the class loader to use to load the provider. |
| 101 | * If the associated value is not an instance of {@link |
| 102 | * java.lang.ClassLoader}, an {@link |
| 103 | * java.lang.IllegalArgumentException} is thrown.</p> |
| 104 | * |
| 105 | * <p>If the <code>jmx.remote.protocol.provider.class.loader</code> |
| 106 | * key is not present in the <code>environment</code> parameter, the |
| 107 | * calling thread's context class loader is used.</p> |
| 108 | * |
| 109 | * <p>If the attempt to load this class produces a {@link |
| 110 | * ClassNotFoundException}, the search for a handler continues with |
| 111 | * the next element of the list.</p> |
| 112 | * |
| 113 | * <p>Otherwise, a problem with the provider found is signalled by a |
| 114 | * {@link JMXProviderException} whose {@link |
| 115 | * JMXProviderException#getCause() <em>cause</em>} indicates the underlying |
| 116 | * exception, as follows:</p> |
| 117 | * |
| 118 | * <ul> |
| 119 | * |
| 120 | * <li>if the attempt to load the class produces an exception other |
| 121 | * than <code>ClassNotFoundException</code>, that is the |
| 122 | * <em>cause</em>; |
| 123 | * |
| 124 | * <li>if {@link Class#newInstance()} for the class produces an |
| 125 | * exception, that is the <em>cause</em>. |
| 126 | * |
| 127 | * </ul> |
| 128 | * |
| 129 | * <p>If no provider is found by the above steps, including the |
| 130 | * default case where there is no provider package list, then the |
| 131 | * implementation will use its own provider for |
| 132 | * <code><em>protocol</em></code>, or it will throw a |
| 133 | * <code>MalformedURLException</code> if there is none. An |
| 134 | * implementation may choose to find providers by other means. For |
| 135 | * example, it may support the <a |
| 136 | * href="{@docRoot}/../technotes/guides/jar/jar.html#Service Provider"> |
| 137 | * JAR conventions for service providers</a>, where the service |
| 138 | * interface is <code>JMXConnectorProvider</code>.</p> |
| 139 | * |
| 140 | * <p>Every implementation must support the RMI connector protocols, |
| 141 | * specified with the string <code>rmi</code> or |
| 142 | * <code>iiop</code>.</p> |
| 143 | * |
| 144 | * <p>Once a provider is found, the result of the |
| 145 | * <code>newJMXConnector</code> method is the result of calling {@link |
| 146 | * JMXConnectorProvider#newJMXConnector(JMXServiceURL,Map) newJMXConnector} |
| 147 | * on the provider.</p> |
| 148 | * |
| 149 | * <p>The <code>Map</code> parameter passed to the |
| 150 | * <code>JMXConnectorProvider</code> is a new read-only |
| 151 | * <code>Map</code> that contains all the entries that were in the |
| 152 | * <code>environment</code> parameter to {@link |
| 153 | * #newJMXConnector(JMXServiceURL,Map) |
| 154 | * JMXConnectorFactory.newJMXConnector}, if there was one. |
| 155 | * Additionally, if the |
| 156 | * <code>jmx.remote.protocol.provider.class.loader</code> key is not |
| 157 | * present in the <code>environment</code> parameter, it is added to |
| 158 | * the new read-only <code>Map</code>. The associated value is the |
| 159 | * calling thread's context class loader.</p> |
| 160 | * |
| 161 | * @since 1.5 |
| 162 | */ |
| 163 | public class JMXConnectorFactory { |
| 164 | |
| 165 | /** |
| 166 | * <p>Name of the attribute that specifies the default class |
| 167 | * loader. This class loader is used to deserialize return values and |
| 168 | * exceptions from remote <code>MBeanServerConnection</code> |
| 169 | * calls. The value associated with this attribute is an instance |
| 170 | * of {@link ClassLoader}.</p> |
| 171 | */ |
| 172 | public static final String DEFAULT_CLASS_LOADER = |
| 173 | "jmx.remote.default.class.loader"; |
| 174 | |
| 175 | /** |
| 176 | * <p>Name of the attribute that specifies the provider packages |
| 177 | * that are consulted when looking for the handler for a protocol. |
| 178 | * The value associated with this attribute is a string with |
| 179 | * package names separated by vertical bars (<code>|</code>).</p> |
| 180 | */ |
| 181 | public static final String PROTOCOL_PROVIDER_PACKAGES = |
| 182 | "jmx.remote.protocol.provider.pkgs"; |
| 183 | |
| 184 | /** |
| 185 | * <p>Name of the attribute that specifies the class |
| 186 | * loader for loading protocol providers. |
| 187 | * The value associated with this attribute is an instance |
| 188 | * of {@link ClassLoader}.</p> |
| 189 | */ |
| 190 | public static final String PROTOCOL_PROVIDER_CLASS_LOADER = |
| 191 | "jmx.remote.protocol.provider.class.loader"; |
| 192 | |
| 193 | private static final String PROTOCOL_PROVIDER_DEFAULT_PACKAGE = |
| 194 | "com.sun.jmx.remote.protocol"; |
| 195 | |
| 196 | private static final ClassLogger logger = |
| 197 | new ClassLogger("javax.management.remote.misc", "JMXConnectorFactory"); |
| 198 | |
| 199 | /** There are no instances of this class. */ |
| 200 | private JMXConnectorFactory() { |
| 201 | } |
| 202 | |
| 203 | /** |
| 204 | * <p>Creates a connection to the connector server at the given |
| 205 | * address.</p> |
| 206 | * |
| 207 | * <p>This method is equivalent to {@link |
| 208 | * #connect(JMXServiceURL,Map) connect(serviceURL, null)}.</p> |
| 209 | * |
| 210 | * @param serviceURL the address of the connector server to |
| 211 | * connect to. |
| 212 | * |
| 213 | * @return a <code>JMXConnector</code> whose {@link |
| 214 | * JMXConnector#connect connect} method has been called. |
| 215 | * |
| 216 | * @exception NullPointerException if <code>serviceURL</code> is null. |
| 217 | * |
| 218 | * @exception IOException if the connector client or the |
| 219 | * connection cannot be made because of a communication problem. |
| 220 | * |
| 221 | * @exception SecurityException if the connection cannot be made |
| 222 | * for security reasons. |
| 223 | */ |
| 224 | public static JMXConnector connect(JMXServiceURL serviceURL) |
| 225 | throws IOException { |
| 226 | return connect(serviceURL, null); |
| 227 | } |
| 228 | |
| 229 | /** |
| 230 | * <p>Creates a connection to the connector server at the given |
| 231 | * address.</p> |
| 232 | * |
| 233 | * <p>This method is equivalent to:</p> |
| 234 | * |
| 235 | * <pre> |
| 236 | * JMXConnector conn = JMXConnectorFactory.newJMXConnector(serviceURL, |
| 237 | * environment); |
| 238 | * conn.connect(environment); |
| 239 | * </pre> |
| 240 | * |
| 241 | * @param serviceURL the address of the connector server to connect to. |
| 242 | * |
| 243 | * @param environment a set of attributes to determine how the |
| 244 | * connection is made. This parameter can be null. Keys in this |
| 245 | * map must be Strings. The appropriate type of each associated |
| 246 | * value depends on the attribute. The contents of |
| 247 | * <code>environment</code> are not changed by this call. |
| 248 | * |
| 249 | * @return a <code>JMXConnector</code> representing the newly-made |
| 250 | * connection. Each successful call to this method produces a |
| 251 | * different object. |
| 252 | * |
| 253 | * @exception NullPointerException if <code>serviceURL</code> is null. |
| 254 | * |
| 255 | * @exception IOException if the connector client or the |
| 256 | * connection cannot be made because of a communication problem. |
| 257 | * |
| 258 | * @exception SecurityException if the connection cannot be made |
| 259 | * for security reasons. |
| 260 | */ |
| 261 | public static JMXConnector connect(JMXServiceURL serviceURL, |
| 262 | Map<String,?> environment) |
| 263 | throws IOException { |
| 264 | if (serviceURL == null) |
| 265 | throw new NullPointerException("Null JMXServiceURL"); |
| 266 | JMXConnector conn = newJMXConnector(serviceURL, environment); |
| 267 | conn.connect(environment); |
| 268 | return conn; |
| 269 | } |
| 270 | |
| 271 | /** |
| 272 | * <p>Creates a connector client for the connector server at the |
| 273 | * given address. The resultant client is not connected until its |
| 274 | * {@link JMXConnector#connect(Map) connect} method is called.</p> |
| 275 | * |
| 276 | * @param serviceURL the address of the connector server to connect to. |
| 277 | * |
| 278 | * @param environment a set of attributes to determine how the |
| 279 | * connection is made. This parameter can be null. Keys in this |
| 280 | * map must be Strings. The appropriate type of each associated |
| 281 | * value depends on the attribute. The contents of |
| 282 | * <code>environment</code> are not changed by this call. |
| 283 | * |
| 284 | * @return a <code>JMXConnector</code> representing the new |
| 285 | * connector client. Each successful call to this method produces |
| 286 | * a different object. |
| 287 | * |
| 288 | * @exception NullPointerException if <code>serviceURL</code> is null. |
| 289 | * |
| 290 | * @exception IOException if the connector client cannot be made |
| 291 | * because of a communication problem. |
| 292 | * |
| 293 | * @exception MalformedURLException if there is no provider for the |
| 294 | * protocol in <code>serviceURL</code>. |
| 295 | * |
| 296 | * @exception JMXProviderException if there is a provider for the |
| 297 | * protocol in <code>serviceURL</code> but it cannot be used for |
| 298 | * some reason. |
| 299 | */ |
| 300 | public static JMXConnector newJMXConnector(JMXServiceURL serviceURL, |
| 301 | Map<String,?> environment) |
| 302 | throws IOException { |
| 303 | Map<String, Object> envcopy; |
| 304 | if (environment == null) |
| 305 | envcopy = new HashMap<String, Object>(); |
| 306 | else { |
| 307 | EnvHelp.checkAttributes(environment); |
| 308 | envcopy = new HashMap<String, Object>(environment); |
| 309 | } |
| 310 | |
| 311 | final ClassLoader loader = resolveClassLoader(envcopy); |
| 312 | final Class<JMXConnectorProvider> targetInterface = JMXConnectorProvider.class; |
| 313 | final String protocol = serviceURL.getProtocol(); |
| 314 | final String providerClassName = "ClientProvider"; |
| 315 | |
| 316 | JMXConnectorProvider provider = |
| 317 | getProvider(serviceURL, envcopy, providerClassName, |
| 318 | targetInterface, loader); |
| 319 | |
| 320 | IOException exception = null; |
| 321 | if (provider == null) { |
| 322 | // Loader is null when context class loader is set to null |
| 323 | // and no loader has been provided in map. |
| 324 | // com.sun.jmx.remote.util.Service class extracted from j2se |
| 325 | // provider search algorithm doesn't handle well null classloader. |
| 326 | if (loader != null) { |
| 327 | try { |
| 328 | JMXConnector connection = |
| 329 | getConnectorAsService(loader, serviceURL, envcopy); |
| 330 | if (connection != null) |
| 331 | return connection; |
| 332 | } catch (JMXProviderException e) { |
| 333 | throw e; |
| 334 | } catch (IOException e) { |
| 335 | exception = e; |
| 336 | } |
| 337 | } |
| 338 | provider = |
| 339 | getProvider(protocol, PROTOCOL_PROVIDER_DEFAULT_PACKAGE, |
| 340 | JMXConnectorFactory.class.getClassLoader(), |
| 341 | providerClassName, targetInterface); |
| 342 | } |
| 343 | |
| 344 | if (provider == null) { |
| 345 | MalformedURLException e = |
| 346 | new MalformedURLException("Unsupported protocol: " + protocol); |
| 347 | if (exception == null) { |
| 348 | throw e; |
| 349 | } else { |
| 350 | throw EnvHelp.initCause(e, exception); |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | envcopy = Collections.unmodifiableMap(envcopy); |
| 355 | |
| 356 | return provider.newJMXConnector(serviceURL, envcopy); |
| 357 | } |
| 358 | |
| 359 | private static String resolvePkgs(Map env) throws JMXProviderException { |
| 360 | |
| 361 | Object pkgsObject = null; |
| 362 | |
| 363 | if (env != null) |
| 364 | pkgsObject = env.get(PROTOCOL_PROVIDER_PACKAGES); |
| 365 | |
| 366 | if (pkgsObject == null) |
| 367 | pkgsObject = |
| 368 | AccessController.doPrivileged(new PrivilegedAction<Object>() { |
| 369 | public Object run() { |
| 370 | return System.getProperty(PROTOCOL_PROVIDER_PACKAGES); |
| 371 | } |
| 372 | }); |
| 373 | |
| 374 | if (pkgsObject == null) |
| 375 | return null; |
| 376 | |
| 377 | if (!(pkgsObject instanceof String)) { |
| 378 | final String msg = "Value of " + PROTOCOL_PROVIDER_PACKAGES + |
| 379 | " parameter is not a String: " + |
| 380 | pkgsObject.getClass().getName(); |
| 381 | throw new JMXProviderException(msg); |
| 382 | } |
| 383 | |
| 384 | final String pkgs = (String) pkgsObject; |
| 385 | if (pkgs.trim().equals("")) |
| 386 | return null; |
| 387 | |
| 388 | // pkgs may not contain an empty element |
| 389 | if (pkgs.startsWith("|") || pkgs.endsWith("|") || |
| 390 | pkgs.indexOf("||") >= 0) { |
| 391 | final String msg = "Value of " + PROTOCOL_PROVIDER_PACKAGES + |
| 392 | " contains an empty element: " + pkgs; |
| 393 | throw new JMXProviderException(msg); |
| 394 | } |
| 395 | |
| 396 | return pkgs; |
| 397 | } |
| 398 | |
| 399 | static <T> T getProvider(JMXServiceURL serviceURL, |
| 400 | Map<String, Object> environment, |
| 401 | String providerClassName, |
| 402 | Class<T> targetInterface, |
| 403 | ClassLoader loader) |
| 404 | throws IOException { |
| 405 | |
| 406 | final String protocol = serviceURL.getProtocol(); |
| 407 | |
| 408 | final String pkgs = resolvePkgs(environment); |
| 409 | |
| 410 | T instance = null; |
| 411 | |
| 412 | if (pkgs != null) { |
| 413 | environment.put(PROTOCOL_PROVIDER_CLASS_LOADER, loader); |
| 414 | |
| 415 | instance = |
| 416 | getProvider(protocol, pkgs, loader, providerClassName, |
| 417 | targetInterface); |
| 418 | } |
| 419 | |
| 420 | return instance; |
| 421 | } |
| 422 | |
| 423 | static <T> Iterator<T> getProviderIterator(final Class<T> providerClass, |
| 424 | final ClassLoader loader) { |
| 425 | ServiceLoader<T> serviceLoader = |
| 426 | ServiceLoader.load(providerClass, |
| 427 | loader); |
| 428 | return serviceLoader.iterator(); |
| 429 | } |
| 430 | |
| 431 | private static JMXConnector getConnectorAsService(ClassLoader loader, |
| 432 | JMXServiceURL url, |
| 433 | Map<String, ?> map) |
| 434 | throws IOException { |
| 435 | |
| 436 | Iterator<JMXConnectorProvider> providers = |
| 437 | getProviderIterator(JMXConnectorProvider.class, loader); |
| 438 | JMXConnector connection = null; |
| 439 | IOException exception = null; |
| 440 | while(providers.hasNext()) { |
| 441 | try { |
| 442 | connection = providers.next().newJMXConnector(url, map); |
| 443 | return connection; |
| 444 | } catch (JMXProviderException e) { |
| 445 | throw e; |
| 446 | } catch (Exception e) { |
| 447 | if (logger.traceOn()) |
| 448 | logger.trace("getConnectorAsService", |
| 449 | "URL[" + url + |
| 450 | "] Service provider exception: " + e); |
| 451 | if (!(e instanceof MalformedURLException)) { |
| 452 | if (exception == null) { |
| 453 | if (exception instanceof IOException) { |
| 454 | exception = (IOException) e; |
| 455 | } else { |
| 456 | exception = EnvHelp.initCause( |
| 457 | new IOException(e.getMessage()), e); |
| 458 | } |
| 459 | } |
| 460 | } |
| 461 | continue; |
| 462 | } |
| 463 | } |
| 464 | if (exception == null) |
| 465 | return null; |
| 466 | else |
| 467 | throw exception; |
| 468 | } |
| 469 | |
| 470 | static <T> T getProvider(String protocol, |
| 471 | String pkgs, |
| 472 | ClassLoader loader, |
| 473 | String providerClassName, |
| 474 | Class<T> targetInterface) |
| 475 | throws IOException { |
| 476 | |
| 477 | StringTokenizer tokenizer = new StringTokenizer(pkgs, "|"); |
| 478 | |
| 479 | while (tokenizer.hasMoreTokens()) { |
| 480 | String pkg = tokenizer.nextToken(); |
| 481 | String className = (pkg + "." + protocol2package(protocol) + |
| 482 | "." + providerClassName); |
| 483 | Class<?> providerClass; |
| 484 | try { |
| 485 | providerClass = Class.forName(className, true, loader); |
| 486 | } catch (ClassNotFoundException e) { |
| 487 | //Add trace. |
| 488 | continue; |
| 489 | } |
| 490 | |
| 491 | if (!targetInterface.isAssignableFrom(providerClass)) { |
| 492 | final String msg = |
| 493 | "Provider class does not implement " + |
| 494 | targetInterface.getName() + ": " + |
| 495 | providerClass.getName(); |
| 496 | throw new JMXProviderException(msg); |
| 497 | } |
| 498 | |
| 499 | // We have just proved that this cast is correct |
| 500 | Class<? extends T> providerClassT = Util.cast(providerClass); |
| 501 | try { |
| 502 | return providerClassT.newInstance(); |
| 503 | } catch (Exception e) { |
| 504 | final String msg = |
| 505 | "Exception when instantiating provider [" + className + |
| 506 | "]"; |
| 507 | throw new JMXProviderException(msg, e); |
| 508 | } |
| 509 | } |
| 510 | |
| 511 | return null; |
| 512 | } |
| 513 | |
| 514 | static ClassLoader resolveClassLoader(Map environment) { |
| 515 | ClassLoader loader = null; |
| 516 | |
| 517 | if (environment != null) { |
| 518 | try { |
| 519 | loader = (ClassLoader) |
| 520 | environment.get(PROTOCOL_PROVIDER_CLASS_LOADER); |
| 521 | } catch (ClassCastException e) { |
| 522 | final String msg = |
| 523 | "The ClassLoader supplied in the environment map using " + |
| 524 | "the " + PROTOCOL_PROVIDER_CLASS_LOADER + |
| 525 | " attribute is not an instance of java.lang.ClassLoader"; |
| 526 | throw new IllegalArgumentException(msg); |
| 527 | } |
| 528 | } |
| 529 | |
| 530 | if (loader == null) |
| 531 | loader = |
| 532 | AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() { |
| 533 | public ClassLoader run() { |
| 534 | return |
| 535 | Thread.currentThread().getContextClassLoader(); |
| 536 | } |
| 537 | }); |
| 538 | |
| 539 | return loader; |
| 540 | } |
| 541 | |
| 542 | private static String protocol2package(String protocol) { |
| 543 | return protocol.replace('+', '.').replace('-', '_'); |
| 544 | } |
| 545 | } |