mappingservice/implementation/src/main/java/org/opendaylight/lispflowmapping/implementation/LispMappingService.java

   1 /*
   2  * Copyright (c) 2014 Contextream, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.lispflowmapping.implementation;
  10
  11 import java.util.concurrent.Future;
  12
  13 import org.apache.commons.lang3.tuple.MutablePair;
  14 import org.apache.commons.lang3.tuple.Pair;
  15 import org.eclipse.osgi.framework.console.CommandInterpreter;
  16 import org.eclipse.osgi.framework.console.CommandProvider;
  17 import org.opendaylight.controller.sal.binding.api.BindingAwareBroker;
  18 import org.opendaylight.controller.sal.binding.api.BindingAwareBroker.ProviderContext;
  19 import org.opendaylight.controller.sal.binding.api.BindingAwareProvider;
  20 import org.opendaylight.controller.sal.binding.api.NotificationListener;
  21 import org.opendaylight.controller.sal.binding.api.NotificationService;
  22 import org.opendaylight.lispflowmapping.implementation.config.ConfigIni;
  23 import org.opendaylight.lispflowmapping.implementation.dao.MappingServiceKey;
  24 import org.opendaylight.lispflowmapping.implementation.dao.MappingServiceKeyUtil;
  25 import org.opendaylight.lispflowmapping.implementation.dao.MappingServiceNoMaskKey;
  26 import org.opendaylight.lispflowmapping.implementation.lisp.MapResolver;
  27 import org.opendaylight.lispflowmapping.implementation.lisp.MapServer;
  28 import org.opendaylight.lispflowmapping.implementation.serializer.LispMessage;
  29 import org.opendaylight.lispflowmapping.implementation.util.LispAFIConvertor;
  30 import org.opendaylight.lispflowmapping.implementation.util.LispNotificationHelper;
  31 import org.opendaylight.lispflowmapping.interfaces.dao.ILispDAO;
  32 import org.opendaylight.lispflowmapping.interfaces.dao.ILispTypeConverter;
  33 import org.opendaylight.lispflowmapping.interfaces.dao.IRowVisitor;
  34 import org.opendaylight.lispflowmapping.interfaces.lisp.IFlowMapping;
  35 import org.opendaylight.lispflowmapping.interfaces.lisp.IFlowMappingShell;
  36 import org.opendaylight.lispflowmapping.interfaces.lisp.IMapNotifyHandler;
  37 import org.opendaylight.lispflowmapping.interfaces.lisp.IMapRequestResultHandler;
  38 import org.opendaylight.lispflowmapping.interfaces.lisp.IMapResolverAsync;
  39 import org.opendaylight.lispflowmapping.interfaces.lisp.IMapServerAsync;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.AddMapping;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.EidToLocatorRecord;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.LfmControlPlaneService;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.MapNotify;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.MapRegister;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.MapReply;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.MapRequest;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.RequestMapping;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.SendMapNotifyInputBuilder;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.SendMapReplyInputBuilder;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.SendMapRequestInputBuilder;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.lispaddress.LispAddressContainer;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.lispaddress.lispaddresscontainer.address.ipv4.Ipv4AddressBuilder;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.mapnotifymessage.MapNotifyBuilder;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.mapreplymessage.MapReplyBuilder;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.maprequestmessage.MapRequestBuilder;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.transportaddress.TransportAddress;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.control.plane.rev150314.transportaddress.TransportAddressBuilder;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.AddKeyInput;
  59 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.AddKeyOutput;
  60 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.AddMappingInput;
  61 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.AddMappingOutput;
  62 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.GetKeyInput;
  63 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.GetKeyOutput;
  64 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.GetKeyWithRefInput;
  65 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.GetKeyWithRefOutput;
  66 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.GetMappingInput;
  67 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.GetMappingOutput;
  68 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.GetMappingWithRefInput;
  69 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.GetMappingWithRefOutput;
  70 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.LfmMappingDatabaseService;
  71 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.RemoveKeyInput;
  72 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.RemoveKeyWithRefInput;
  73 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.RemoveMappingInput;
  74 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.RemoveMappingWithRefInput;
  75 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.UpdateKeyInput;
  76 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.UpdateKeyWithRefInput;
  77 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.UpdateMappingInput;
  78 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mapping.database.rev150314.UpdateMappingWithRefInput;
  79 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Address;
  80 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv6Address;
  81 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.PortNumber;
  82 import org.opendaylight.yangtools.yang.binding.Notification;
  83 import org.opendaylight.yangtools.yang.common.RpcResult;
  84 import org.osgi.framework.BundleContext;
  85 import org.osgi.framework.FrameworkUtil;
  86 import org.slf4j.Logger;
  87 import org.slf4j.LoggerFactory;
  88
  89 public class LispMappingService implements CommandProvider, IFlowMapping, IFlowMappingShell, BindingAwareProvider,
  90         IMapRequestResultHandler, IMapNotifyHandler, LfmMappingDatabaseService {
  91     protected static final Logger LOG = LoggerFactory.getLogger(LispMappingService.class);
  92
  93     private static final ConfigIni configIni = new ConfigIni();
  94     private ILispDAO lispDao = null;
  95     private IMapResolverAsync mapResolver;
  96     private IMapServerAsync mapServer;
  97     private volatile boolean shouldIterateMask;
  98     private volatile boolean shouldAuthenticate;
  99     private volatile boolean smr = configIni.smrIsSet();
 100     private ThreadLocal<MapReply> tlsMapReply = new ThreadLocal<MapReply>();
 101     private ThreadLocal<MapNotify> tlsMapNotify = new ThreadLocal<MapNotify>();
 102     private ThreadLocal<Pair<MapRequest, TransportAddress>> tlsMapRequest = new ThreadLocal<Pair<MapRequest, TransportAddress>>();
 103
 104     private LfmControlPlaneService lispSB = null;
 105
 106     private ProviderContext session;
 107
 108     private NotificationService notificationService;
 109
 110     class LispIpv4AddressInMemoryConverter implements ILispTypeConverter<Ipv4Address, Integer> {
 111     }
 112
 113     class LispIpv6AddressInMemoryConverter implements ILispTypeConverter<Ipv6Address, Integer> {
 114     }
 115
 116     class MappingServiceKeyConvertor implements ILispTypeConverter<MappingServiceKey, Integer> {
 117     }
 118
 119     class MappingServiceNoMaskKeyConvertor implements ILispTypeConverter<MappingServiceNoMaskKey, Integer> {
 120     }
 121
 122     void setBindingAwareBroker(BindingAwareBroker bindingAwareBroker) {
 123         LOG.trace("BindingAwareBroker set!");
 124         BundleContext bundleContext = FrameworkUtil.getBundle(this.getClass()).getBundleContext();
 125         bindingAwareBroker.registerProvider(this, bundleContext);
 126     }
 127
 128     void unsetBindingAwareBroker(BindingAwareBroker bindingAwareBroker) {
 129         LOG.debug("BindingAwareBroker was unset in LispMappingService");
 130     }
 131
 132     public void basicInit(ILispDAO dao) {
 133         lispDao = dao;
 134         mapResolver = new MapResolver(dao);
 135         mapServer = new MapServer(dao);
 136     }
 137
 138     void setLispDao(ILispDAO dao) {
 139         LOG.trace("LispDAO set in LispMappingService");
 140         basicInit(dao);
 141     }
 142
 143     void unsetLispDao(ILispDAO dao) {
 144         LOG.trace("LispDAO was unset in LispMappingService");
 145         mapServer = null;
 146         mapResolver = null;
 147         lispDao = null;
 148     }
 149
 150     public void init() {
 151         try {
 152             registerWithOSGIConsole();
 153             LOG.info("LISP (RFC6830) Mapping Service init finished");
 154         } catch (Exception e) {
 155             LOG.error(e.getStackTrace().toString());
 156         }
 157     }
 158
 159     private void registerWithOSGIConsole() {
 160         BundleContext bundleContext = FrameworkUtil.getBundle(this.getClass()).getBundleContext();
 161         bundleContext.registerService(CommandProvider.class.getName(), this, null);
 162     }
 163
 164     public void destroy() {
 165         LOG.info("LISP (RFC6830) Mapping Service is destroyed!");
 166         mapResolver = null;
 167         mapServer = null;
 168     }
 169
 170     public void _removeEid(final CommandInterpreter ci) {
 171         LispAddressContainer eid = LispAFIConvertor.getIPContainer(ci.nextArgument());
 172         lispDao.remove(MappingServiceKeyUtil.generateMappingServiceKey(eid));
 173     }
 174
 175     public void _dumpAll(final CommandInterpreter ci) {
 176         ci.print(printMappings());
 177     }
 178
 179     public String printMappings() {
 180         final StringBuffer sb = new StringBuffer();
 181         sb.append("EID\tRLOCs\n");
 182         lispDao.getAll(new IRowVisitor() {
 183             String lastKey = "";
 184
 185             public void visitRow(Object keyId, String valueKey, Object value) {
 186                 String key = keyId.getClass().getSimpleName() + "#" + keyId;
 187                 if (!lastKey.equals(key)) {
 188                     sb.append("\n" + key + "\t");
 189                 }
 190                 sb.append(valueKey + "=" + value + "\t");
 191                 lastKey = key;
 192             }
 193         });
 194         sb.append("\n");
 195         return sb.toString();
 196     }
 197
 198     public void _setShouldOverwriteRlocs(final CommandInterpreter ci) {
 199         try {
 200             boolean shouldOverwriteRloc = Boolean.parseBoolean(ci.nextArgument());
 201             setOverwrite(shouldOverwriteRloc);
 202         } catch (Exception e) {
 203             ci.println("Bad Usage!!");
 204         }
 205
 206     }
 207
 208     public void _addDefaultPassword(final CommandInterpreter ci) {
 209         addDefaultKeyIPv4();
 210     }
 211
 212     public void addDefaultKeyIPv4() {
 213         LispAddressContainer address = LispAFIConvertor.toContainer(
 214                 new Ipv4AddressBuilder().setIpv4Address(new Ipv4Address("0.0.0.0")).build());
 215         addAuthenticationKey(address, 0, "password");
 216     }
 217
 218     public String getHelp() {
 219         StringBuffer help = new StringBuffer();
 220         help.append("---LISP Mapping Service---\n");
 221         help.append("\t dumpAll                               - Dump all current EID -> RLOC mappings\n");
 222         help.append("\t removeEid <EID>                       - Remove a single EID (/32 or /128)\n");
 223         help.append("\t setShouldOverwriteRlocs <true|false>  - Set the map server's behavior regarding existing RLOCs\n");
 224         help.append("\t addDefaultPassword                    - Add \"password\" as default password for IPv4 EIDs");
 225         return help.toString();
 226     }
 227
 228     public MapReply handleMapRequest(MapRequest request) {
 229         return handleMapRequest(request, smr);
 230     }
 231
 232     public MapReply handleMapRequest(MapRequest request, boolean smr) {
 233         tlsMapReply.set(null);
 234         tlsMapRequest.set(null);
 235         mapResolver.handleMapRequest(request, smr, this);
 236         // After this invocation we assume that the thread local is filled with
 237         // the reply
 238         if (tlsMapRequest.get() != null) {
 239             SendMapRequestInputBuilder smrib = new SendMapRequestInputBuilder();
 240             new MapRequestBuilder(tlsMapRequest.get().getLeft());
 241             smrib.setMapRequest(new MapRequestBuilder(tlsMapRequest.get().getLeft()).build());
 242             smrib.setTransportAddress(tlsMapRequest.get().getRight());
 243             getLispSB().sendMapRequest(smrib.build());
 244             return null;
 245         } else {
 246             return tlsMapReply.get();
 247         }
 248
 249     }
 250
 251     public MapNotify handleMapRegister(MapRegister mapRegister) {
 252         return handleMapRegister(mapRegister, smr);
 253     }
 254
 255     public MapNotify handleMapRegister(MapRegister mapRegister, boolean smr) {
 256         tlsMapNotify.set(null);
 257         mapServer.handleMapRegister(mapRegister, smr, this);
 258         // After this invocation we assume that the thread local is filled with
 259         // the reply
 260         return tlsMapNotify.get();
 261     }
 262
 263     public String getAuthenticationKey(LispAddressContainer address, int maskLen) {
 264         return mapServer.getAuthenticationKey(address, maskLen);
 265     }
 266
 267     public void removeAuthenticationKey(LispAddressContainer address, int maskLen) {
 268         mapServer.removeAuthenticationKey(address, maskLen);
 269     }
 270
 271     public void addAuthenticationKey(LispAddressContainer address, int maskLen, String key) {
 272         mapServer.addAuthenticationKey(address, maskLen, key);
 273     }
 274
 275     public void removeMapping(LispAddressContainer address, int maskLen) {
 276         mapServer.removeMapping(address, maskLen, smr, this);
 277     }
 278
 279     public boolean shouldIterateMask() {
 280         return this.shouldIterateMask;
 281     }
 282
 283     public boolean shouldUseSmr() {
 284         return this.smr;
 285     }
 286
 287     public void setShouldUseSmr(boolean smr) {
 288         this.smr = smr;
 289     }
 290
 291     public void setShouldIterateMask(boolean shouldIterateMask) {
 292         this.shouldIterateMask = shouldIterateMask;
 293         this.mapResolver.setShouldIterateMask(shouldIterateMask);
 294         this.mapServer.setShouldIterateMask(shouldIterateMask);
 295     }
 296
 297     public void setShouldAuthenticate(boolean shouldAuthenticate) {
 298         this.shouldAuthenticate = shouldAuthenticate;
 299         this.mapResolver.setShouldAuthenticate(shouldAuthenticate);
 300         this.mapServer.setShouldAuthenticate(shouldAuthenticate);
 301     }
 302
 303     public boolean shouldAuthenticate() {
 304         return shouldAuthenticate;
 305     }
 306
 307     @Override
 308     public void onSessionInitiated(ProviderContext session) {
 309         LOG.info("Lisp Consumer session initialized!");
 310         notificationService = session.getSALService(NotificationService.class);
 311         registerNotificationListener(AddMapping.class, new MapRegisterNotificationHandler());
 312         registerNotificationListener(RequestMapping.class, new MapRequestNotificationHandler());
 313         session.addRpcImplementation(LfmMappingDatabaseService.class, this);
 314         this.session = session;
 315     }
 316
 317     public <T extends Notification> void registerNotificationListener(Class<T> notificationType, NotificationListener<T> listener) {
 318         notificationService.registerNotificationListener(notificationType, listener);
 319     }
 320
 321     private class MapRegisterNotificationHandler implements NotificationListener<AddMapping> {
 322
 323         @Override
 324         public void onNotification(AddMapping mapRegisterNotification) {
 325             MapNotify mapNotify = handleMapRegister(mapRegisterNotification.getMapRegister(), smr);
 326             if (mapNotify != null) {
 327                 TransportAddressBuilder tab = new TransportAddressBuilder();
 328                 tab.setIpAddress(mapRegisterNotification.getTransportAddress().getIpAddress());
 329                 tab.setPort(new PortNumber(LispMessage.PORT_NUM));
 330                 SendMapNotifyInputBuilder smnib = new SendMapNotifyInputBuilder();
 331                 smnib.setMapNotify(new MapNotifyBuilder(mapNotify).build());
 332                 smnib.setTransportAddress(tab.build());
 333                 getLispSB().sendMapNotify(smnib.build());
 334             } else {
 335                 LOG.warn("got null map notify");
 336             }
 337
 338         }
 339     }
 340
 341     private class MapRequestNotificationHandler implements NotificationListener<RequestMapping> {
 342
 343         @Override
 344         public void onNotification(RequestMapping mapRequestNotification) {
 345             MapReply mapReply = handleMapRequest(mapRequestNotification.getMapRequest());
 346             if (mapReply != null) {
 347                 SendMapReplyInputBuilder smrib = new SendMapReplyInputBuilder();
 348                 smrib.setMapReply((new MapReplyBuilder(mapReply).build()));
 349                 smrib.setTransportAddress(mapRequestNotification.getTransportAddress());
 350                 getLispSB().sendMapReply(smrib.build());
 351             } else {
 352                 LOG.warn("got null map reply");
 353             }
 354         }
 355     }
 356
 357     private LfmControlPlaneService getLispSB() {
 358         if (lispSB == null) {
 359             lispSB = session.getRpcService(LfmControlPlaneService.class);
 360         }
 361         return lispSB;
 362     }
 363
 364     public void handleMapReply(MapReply reply) {
 365         tlsMapReply.set(reply);
 366     }
 367
 368     public void handleMapNotify(MapNotify notify) {
 369         tlsMapNotify.set(notify);
 370     }
 371
 372     public void handleSMR(MapRequest smr, LispAddressContainer subscriber) {
 373         LOG.debug("Sending SMR to " + subscriber.toString());
 374         SendMapRequestInputBuilder smrib = new SendMapRequestInputBuilder();
 375         smrib.setMapRequest(new MapRequestBuilder(smr).build());
 376         smrib.setTransportAddress(LispNotificationHelper.getTransportAddressFromContainer(subscriber));
 377         getLispSB().sendMapRequest(smrib.build());
 378
 379     }
 380
 381     @Override
 382     public void handleNonProxyMapRequest(MapRequest mapRequest, TransportAddress transportAddress) {
 383         tlsMapRequest.set(new MutablePair<MapRequest, TransportAddress>(mapRequest, transportAddress));
 384     }
 385
 386     @Override
 387     public void clean() {
 388         lispDao.removeAll();
 389     }
 390
 391     @Override
 392     public boolean shouldOverwrite() {
 393         return mapServer.shouldOverwrite();
 394     }
 395
 396     @Override
 397     public void setOverwrite(boolean overwrite) {
 398         mapServer.setOverwrite(overwrite);
 399     }
 400
 401     @Override
 402     public Future<RpcResult<AddKeyOutput>> addKey(AddKeyInput input) {
 403         // TODO Auto-generated method stub
 404         return null;
 405     }
 406
 407     @Override
 408     public Future<RpcResult<AddMappingOutput>> addMapping(AddMappingInput input) {
 409         // TODO Auto-generated method stub
 410         return null;
 411     }
 412
 413     @Override
 414     public Future<RpcResult<GetKeyOutput>> getKey(GetKeyInput input) {
 415         // TODO Auto-generated method stub
 416         return null;
 417     }
 418
 419     @Override
 420     public Future<RpcResult<GetKeyWithRefOutput>> getKeyWithRef(
 421             GetKeyWithRefInput input) {
 422         // TODO Auto-generated method stub
 423         return null;
 424     }
 425
 426     @Override
 427     public Future<RpcResult<GetMappingOutput>> getMapping(GetMappingInput input) {
 428         // TODO Auto-generated method stub
 429         return null;
 430     }
 431
 432     @Override
 433     public Future<RpcResult<GetMappingWithRefOutput>> getMappingWithRef(
 434             GetMappingWithRefInput input) {
 435         // TODO Auto-generated method stub
 436         return null;
 437     }
 438
 439     @Override
 440     public Future<RpcResult<Void>> removeKey(RemoveKeyInput input) {
 441         // TODO Auto-generated method stub
 442         return null;
 443     }
 444
 445     @Override
 446     public Future<RpcResult<Void>> removeKeyWithRef(RemoveKeyWithRefInput input) {
 447         // TODO Auto-generated method stub
 448         return null;
 449     }
 450
 451     @Override
 452     public Future<RpcResult<Void>> removeMapping(RemoveMappingInput input) {
 453         // TODO Auto-generated method stub
 454         return null;
 455     }
 456
 457     @Override
 458     public Future<RpcResult<Void>> removeMappingWithRef(
 459             RemoveMappingWithRefInput input) {
 460         // TODO Auto-generated method stub
 461         return null;
 462     }
 463
 464     @Override
 465     public Future<RpcResult<Void>> updateKey(UpdateKeyInput input) {
 466         // TODO Auto-generated method stub
 467         return null;
 468     }
 469
 470     @Override
 471     public Future<RpcResult<Void>> updateKeyWithRef(UpdateKeyWithRefInput input) {
 472         // TODO Auto-generated method stub
 473         return null;
 474     }
 475
 476     @Override
 477     public Future<RpcResult<Void>> updateMapping(UpdateMappingInput input) {
 478         // TODO Auto-generated method stub
 479         return null;
 480     }
 481
 482     @Override
 483     public Future<RpcResult<Void>> updateMappingWithRef(
 484             UpdateMappingWithRefInput input) {
 485         // TODO Auto-generated method stub
 486         return null;
 487     }
 488 }