aaf/src/test/java/com/att/cadi/lur/aaf/test/JU_Lur2_0Call.java

   1 /*******************************************************************************\r
   2  * ============LICENSE_START====================================================\r
   3  * * org.onap.aaf\r
   4  * * ===========================================================================\r
   5  * * Copyright © 2017 AT&T Intellectual Property. All rights reserved.\r
   6  * * ===========================================================================\r
   7  * * Licensed under the Apache License, Version 2.0 (the "License");\r
   8  * * you may not use this file except in compliance with the License.\r
   9  * * You may obtain a copy of the License at\r
  10  * * \r
  11  *  *      http://www.apache.org/licenses/LICENSE-2.0\r
  12  * * \r
  13  *  * Unless required by applicable law or agreed to in writing, software\r
  14  * * distributed under the License is distributed on an "AS IS" BASIS,\r
  15  * * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
  16  * * See the License for the specific language governing permissions and\r
  17  * * limitations under the License.\r
  18  * * ============LICENSE_END====================================================\r
  19  * *\r
  20  * * ECOMP is a trademark and service mark of AT&T Intellectual Property.\r
  21  * *\r
  22  ******************************************************************************/\r
  23 package com.att.cadi.lur.aaf.test;\r
  24 \r
  25 import static org.junit.Assert.assertEquals;\r
  26 \r
  27 import java.io.BufferedReader;\r
  28 import java.io.IOException;\r
  29 import java.io.UnsupportedEncodingException;\r
  30 import java.net.HttpURLConnection;\r
  31 import java.security.Principal;\r
  32 import java.util.Collection;\r
  33 import java.util.Enumeration;\r
  34 import java.util.Locale;\r
  35 import java.util.Map;\r
  36 \r
  37 import javax.servlet.AsyncContext;\r
  38 import javax.servlet.DispatcherType;\r
  39 import javax.servlet.RequestDispatcher;\r
  40 import javax.servlet.ServletContext;\r
  41 import javax.servlet.ServletException;\r
  42 import javax.servlet.ServletInputStream;\r
  43 import javax.servlet.ServletRequest;\r
  44 import javax.servlet.ServletResponse;\r
  45 import javax.servlet.http.Cookie;\r
  46 import javax.servlet.http.HttpServletRequest;\r
  47 import javax.servlet.http.HttpServletResponse;\r
  48 import javax.servlet.http.HttpSession;\r
  49 import javax.servlet.http.Part;\r
  50 \r
  51 import org.junit.BeforeClass;\r
  52 import org.junit.Test;\r
  53 \r
  54 import com.att.cadi.CadiException;\r
  55 import com.att.cadi.Lur;\r
  56 import com.att.cadi.Permission;\r
  57 import com.att.cadi.PropAccess;\r
  58 import com.att.cadi.Symm;\r
  59 import com.att.cadi.Taf.LifeForm;\r
  60 import com.att.cadi.aaf.AAFPermission;\r
  61 import com.att.cadi.aaf.v2_0.AAFConHttp;\r
  62 import com.att.cadi.aaf.v2_0.AAFLurPerm;\r
  63 import com.att.cadi.aaf.v2_0.AAFTaf;\r
  64 import com.att.cadi.locator.DNSLocator;\r
  65 import com.att.cadi.lur.ConfigPrincipal;\r
  66 import com.att.cadi.lur.LocalPermission;\r
  67 import com.att.cadi.taf.TafResp;\r
  68 \r
  69 public class JU_Lur2_0Call {\r
  70         private static AAFConHttp aaf;\r
  71         private static PropAccess access;\r
  72 \r
  73         @BeforeClass\r
  74         public static void setUpBeforeClass() throws Exception {\r
  75                 access = new PropAccess();\r
  76                 aaf = new AAFConHttp(access,new DNSLocator(access,"https","localhost","8100"));\r
  77                 aaf.basicAuth("testid", "whatever");\r
  78         }\r
  79 \r
  80         @Test \r
  81         public void test() throws Exception {\r
  82         \r
  83                 AAFLurPerm aafLur = aaf.newLur();\r
  84 \r
  85                 Principal pri = new ConfigPrincipal("testid@aaf.att.com","whatever");\r
  86                 for (int i = 0; i < 10; ++i) {\r
  87                         print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|myInstance|write"),true);\r
  88                         print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|kumquat|write"),false);\r
  89                         print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|myInstance|read"),true);\r
  90                         print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|kumquat|read"),true);\r
  91                         \r
  92                         print(aafLur, pri, new AAFPermission("com.test.JU_Lur2_0Call.service","myInstance","write"),true);\r
  93                         print(aafLur, pri, new AAFPermission("com.test.JU_Lur2_0Call.service","kumquat","write"),false);\r
  94                         print(aafLur, pri, new AAFPermission("com.test.JU_Lur2_0Call.service","myInstance","read"),true);\r
  95                         print(aafLur, pri, new AAFPermission("com.test.JU_Lur2_0Call.service","kumquat","read"),true);\r
  96 \r
  97                         print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|!kum.*|read"),true);\r
  98                         print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|myInstance|!wr*"),true);\r
  99                         print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|myInstance"),true);\r
 100 \r
 101                         print(aafLur, pri, new AAFPermission("com.test.JU_Lur2_0Call.service","!kum.*","read"),true);\r
 102                         print(aafLur, pri, new AAFPermission("com.test.JU_Lur2_0Call.service","myInstance","!wr*"),true);\r
 103 \r
 104                         print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|!kum[Qq]uat|read"),true);\r
 105                         print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|!my[iI]nstance|!wr*"),true);\r
 106                         print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|!my[iI]nstance|!wr*"),true);\r
 107                         print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|myInstance|!wr*"),true);\r
 108 \r
 109                         print(aafLur, pri, new AAFPermission("com.test.JU_Lur2_0Call.service","!kum[Qq]uat","read"),true);\r
 110                         print(aafLur, pri, new AAFPermission("com.test.JU_Lur2_0Call.service","!my[iI]nstance","!wr*"),true);\r
 111                         print(aafLur, pri, new AAFPermission("com.test.JU_Lur2_0Call.service","!my[iI]nstance","!wr*"),true);\r
 112                         print(aafLur, pri, new AAFPermission("com.test.JU_Lur2_0Call.service","myInstance","!wr*"),true);\r
 113                         \r
 114 \r
 115                         print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|!my.nstance|!wr*"),true);\r
 116                         print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|my.nstance|!wr*"),false);\r
 117                         \r
 118                         print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|my.nstance|!wr*"),false);\r
 119                         \r
 120                         //Maitrayee, aren't we going to have issues if we do RegExp with "."?\r
 121                         //Is it too expensive to only do Reg Ex in presence of special characters, []{}*, etc? Not sure this helps for GRID.\r
 122                         print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|kum.quat|read"),true);\r
 123                         print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|!kum..uat|read"),true);\r
 124                         \r
 125                         print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|myInstance"),true); // ok if Stored Action is "*"\r
 126                         \r
 127                         // Key Evaluations\r
 128                         print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|:myCluster:*:!my.*|write"),true); // ok if Stored Action is "*"\r
 129                         print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|:myCluster:*|write"),false); // not ok if key lengths don't match "*"\r
 130                         print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|:myCluster:*:myCF|write"),true); // ok if Stored Action is "*"\r
 131                         print(aafLur, pri, new AAFPermission("com.test.JU_Lur2_0Call.service",":myCluster:*:!my.*","write"),true); // ok if Stored Action is "*"\r
 132                         print(aafLur, pri, new AAFPermission("com.test.JU_Lur2_0Call.service",":myCluster:*:myCF","write"),true); // ok if Stored Action is "*"\r
 133                         print(aafLur, pri, new AAFPermission("com.test.JU_Lur2_0Call.service",":myCluster:*","write"),false); // not ok if key lengths don't match\r
 134                         \r
 135                 }\r
 136 \r
 137                 print(aafLur, pri, new LocalPermission("bogus"),false);\r
 138 \r
 139 //              try {\r
 140 //                      Thread.sleep(7000);\r
 141 //              } catch (InterruptedException e) {\r
 142 //                      e.printStackTrace();\r
 143 //              }\r
 144                 for (int i = 0; i < 10; ++i)\r
 145                         print(aafLur, pri, new LocalPermission("supergroup"),false);\r
 146 \r
 147                 System.out.println("All Done");\r
 148         }\r
 149         @Test\r
 150         public void testTaf() throws Exception {\r
 151                 AAFTaf<?> aaft = new AAFTaf<HttpURLConnection>(aaf,true);\r
 152                 \r
 153                 TafResp resp;\r
 154                 // No Header\r
 155                 resp = aaft.validate(LifeForm.CBLF, new Req(), null);\r
 156                 assertEquals(TafResp.RESP.TRY_AUTHENTICATING, resp.isAuthenticated());\r
 157 \r
 158                 String auth = "Basic " + Symm.base64.encode("testid:whatever");\r
 159                 resp = aaft.validate(LifeForm.CBLF, new Req("Authorization",auth), null);\r
 160                 assertEquals(TafResp.RESP.IS_AUTHENTICATED, resp.isAuthenticated());\r
 161                 \r
 162         }\r
 163 //      @Test\r
 164 //      public void testRole() throws CadiException {\r
 165 //              TestAccess ta = new TestAccess();\r
 166 //              AAFLurRole1_0 aafLur = new AAFLurRole1_0(\r
 167 //                              ta,\r
 168 ////                            "http://DME2RESOLVE/service=com.att.authz.AuthorizationService/version=1.0.0/envContext=UAT/routeOffer=BAU_SE",\r
 169 //                              "http://DME2RESOLVE/service=com.att.authz.AuthorizationService/version=1.0.0/envContext=DEV/routeOffer=D1",\r
 170 //                              "m12345", "m12345pass", 50000, // dme Time\r
 171 //                              // 5*60000); // 5 minutes User Expiration\r
 172 //                              50000, // 5 seconds after Expiration\r
 173 //                              200); // High Count of items.. These do not take much memory\r
 174 //\r
 175 //              Principal pri = new ConfigPrincipal("xy1234","whatever);\r
 176 //              for (int i = 0; i < 10; ++i) {\r
 177 ////                    print(aafLur, pri, new LocalPermission("*|*|*|com.att.authz"));\r
 178 //                      print(aafLur, pri, new LocalPermission("service|myInstance|write"),false);\r
 179 //                      print(aafLur, pri, new LocalPermission("com.test.JU_Lur2_0Call.service|myInstance|write"),false);\r
 180 //                      print(aafLur, pri, new LocalPermission("com.att.cadi"),true);\r
 181 //                      print(aafLur, pri, new LocalPermission("global"),true);\r
 182 //                      print(aafLur, pri, new LocalPermission("kumquat"),false);\r
 183 //              }\r
 184 //\r
 185 //              print(aafLur, pri, new LocalPermission("bogus"),false);\r
 186 //\r
 187 //              for (int i = 0; i < 10; ++i)\r
 188 //                      print(aafLur, pri, new LocalPermission("supergroup"),false);\r
 189 //\r
 190 //              System.out.println("All Done");\r
 191 //      }\r
 192 \r
 193 \r
 194         private void print(Lur aafLur, Principal pri, Permission perm, boolean shouldBe)\r
 195                         throws CadiException {\r
 196                 long start = System.nanoTime();\r
 197         \r
 198                 // The Call\r
 199                 boolean ok = aafLur.fish(pri, perm);\r
 200         \r
 201                 assertEquals(shouldBe,ok);\r
 202                 float ms = (System.nanoTime() - start) / 1000000f;\r
 203                 if (ok) {\r
 204                         System.out.println("Yes, part of " + perm.getKey() + " (" + ms\r
 205                                         + "ms)");\r
 206                 } else {\r
 207                         System.out.println("No, not part of " + perm.getKey() + " (" + ms\r
 208                                         + "ms)");\r
 209                 }\r
 210         }\r
 211 \r
 212         @SuppressWarnings("rawtypes")\r
 213         public class Req implements HttpServletRequest {\r
 214                 private String[] headers;\r
 215 \r
 216                 public Req(String ... headers) {\r
 217                         this.headers = headers;\r
 218                 }\r
 219 \r
 220                 public Object getAttribute(String name) {\r
 221                         // TODO Auto-generated method stub\r
 222                         return null;\r
 223                 }\r
 224 \r
 225                 @SuppressWarnings("unchecked")\r
 226                 public Enumeration getAttributeNames() {\r
 227                         // TODO Auto-generated method stub\r
 228                         return null;\r
 229                 }\r
 230 \r
 231                 public String getCharacterEncoding() {\r
 232                         // TODO Auto-generated method stub\r
 233                         return null;\r
 234                 }\r
 235 \r
 236                 public void setCharacterEncoding(String env)\r
 237                                 throws UnsupportedEncodingException {\r
 238                         // TODO Auto-generated method stub\r
 239                         \r
 240                 }\r
 241 \r
 242                 public int getContentLength() {\r
 243                         // TODO Auto-generated method stub\r
 244                         return 0;\r
 245                 }\r
 246 \r
 247                 public String getContentType() {\r
 248                         // TODO Auto-generated method stub\r
 249                         return null;\r
 250                 }\r
 251 \r
 252                 public ServletInputStream getInputStream() throws IOException {\r
 253                         // TODO Auto-generated method stub\r
 254                         return null;\r
 255                 }\r
 256 \r
 257                 public String getParameter(String name) {\r
 258                         // TODO Auto-generated method stub\r
 259                         return null;\r
 260                 }\r
 261 \r
 262                 @SuppressWarnings("unchecked")\r
 263                 public Enumeration getParameterNames() {\r
 264                         // TODO Auto-generated method stub\r
 265                         return null;\r
 266                 }\r
 267 \r
 268                 public String[] getParameterValues(String name) {\r
 269                         // TODO Auto-generated method stub\r
 270                         return null;\r
 271                 }\r
 272 \r
 273                 @SuppressWarnings("unchecked")\r
 274                 public Map getParameterMap() {\r
 275                         // TODO Auto-generated method stub\r
 276                         return null;\r
 277                 }\r
 278 \r
 279                 public String getProtocol() {\r
 280                         // TODO Auto-generated method stub\r
 281                         return null;\r
 282                 }\r
 283 \r
 284                 public String getScheme() {\r
 285                         // TODO Auto-generated method stub\r
 286                         return null;\r
 287                 }\r
 288 \r
 289                 public String getServerName() {\r
 290                         // TODO Auto-generated method stub\r
 291                         return null;\r
 292                 }\r
 293 \r
 294                 public int getServerPort() {\r
 295                         // TODO Auto-generated method stub\r
 296                         return 0;\r
 297                 }\r
 298 \r
 299                 public BufferedReader getReader() throws IOException {\r
 300                         // TODO Auto-generated method stub\r
 301                         return null;\r
 302                 }\r
 303 \r
 304                 public String getRemoteAddr() {\r
 305                         // TODO Auto-generated method stub\r
 306                         return null;\r
 307                 }\r
 308 \r
 309                 public String getRemoteHost() {\r
 310                         // TODO Auto-generated method stub\r
 311                         return null;\r
 312                 }\r
 313 \r
 314                 public void setAttribute(String name, Object o) {\r
 315                         // TODO Auto-generated method stub\r
 316                         \r
 317                 }\r
 318 \r
 319                 public void removeAttribute(String name) {\r
 320                         // TODO Auto-generated method stub\r
 321                         \r
 322                 }\r
 323 \r
 324                 public Locale getLocale() {\r
 325                         // TODO Auto-generated method stub\r
 326                         return null;\r
 327                 }\r
 328 \r
 329                 @SuppressWarnings("unchecked")\r
 330                 public Enumeration getLocales() {\r
 331                         // TODO Auto-generated method stub\r
 332                         return null;\r
 333                 }\r
 334 \r
 335                 public boolean isSecure() {\r
 336                         // TODO Auto-generated method stub\r
 337                         return false;\r
 338                 }\r
 339 \r
 340                 public RequestDispatcher getRequestDispatcher(String path) {\r
 341                         // TODO Auto-generated method stub\r
 342                         return null;\r
 343                 }\r
 344 \r
 345                 public String getRealPath(String path) {\r
 346                         // TODO Auto-generated method stub\r
 347                         return null;\r
 348                 }\r
 349 \r
 350                 public int getRemotePort() {\r
 351                         // TODO Auto-generated method stub\r
 352                         return 0;\r
 353                 }\r
 354 \r
 355                 public String getLocalName() {\r
 356                         // TODO Auto-generated method stub\r
 357                         return null;\r
 358                 }\r
 359 \r
 360                 public String getLocalAddr() {\r
 361                         // TODO Auto-generated method stub\r
 362                         return null;\r
 363                 }\r
 364 \r
 365                 public int getLocalPort() {\r
 366                         // TODO Auto-generated method stub\r
 367                         return 0;\r
 368                 }\r
 369 \r
 370                 public String getAuthType() {\r
 371                         // TODO Auto-generated method stub\r
 372                         return null;\r
 373                 }\r
 374 \r
 375                 public Cookie[] getCookies() {\r
 376                         // TODO Auto-generated method stub\r
 377                         return null;\r
 378                 }\r
 379 \r
 380                 public long getDateHeader(String name) {\r
 381                         // TODO Auto-generated method stub\r
 382                         return 0;\r
 383                 }\r
 384 \r
 385                 public String getHeader(String name) {\r
 386                         for(int i=1;i<headers.length;i=i+2) {\r
 387                                 if(headers[i-1].equals(name)) return headers[i];\r
 388                         }\r
 389                         return null;\r
 390                 }\r
 391 \r
 392                 @SuppressWarnings("unchecked")\r
 393                 public Enumeration getHeaders(String name) {\r
 394                         // TODO Auto-generated method stub\r
 395                         return null;\r
 396                 }\r
 397 \r
 398                 @SuppressWarnings("unchecked")\r
 399                 public Enumeration getHeaderNames() {\r
 400                         // TODO Auto-generated method stub\r
 401                         return null;\r
 402                 }\r
 403 \r
 404                 public int getIntHeader(String name) {\r
 405                         // TODO Auto-generated method stub\r
 406                         return 0;\r
 407                 }\r
 408 \r
 409                 public String getMethod() {\r
 410                         // TODO Auto-generated method stub\r
 411                         return null;\r
 412                 }\r
 413 \r
 414                 public String getPathInfo() {\r
 415                         // TODO Auto-generated method stub\r
 416                         return null;\r
 417                 }\r
 418 \r
 419                 public String getPathTranslated() {\r
 420                         // TODO Auto-generated method stub\r
 421                         return null;\r
 422                 }\r
 423 \r
 424                 public String getContextPath() {\r
 425                         // TODO Auto-generated method stub\r
 426                         return null;\r
 427                 }\r
 428 \r
 429                 public String getQueryString() {\r
 430                         // TODO Auto-generated method stub\r
 431                         return null;\r
 432                 }\r
 433 \r
 434                 public String getRemoteUser() {\r
 435                         // TODO Auto-generated method stub\r
 436                         return null;\r
 437                 }\r
 438 \r
 439                 public boolean isUserInRole(String role) {\r
 440                         // TODO Auto-generated method stub\r
 441                         return false;\r
 442                 }\r
 443 \r
 444                 public Principal getUserPrincipal() {\r
 445                         // TODO Auto-generated method stub\r
 446                         return null;\r
 447                 }\r
 448 \r
 449                 public String getRequestedSessionId() {\r
 450                         // TODO Auto-generated method stub\r
 451                         return null;\r
 452                 }\r
 453 \r
 454                 public String getRequestURI() {\r
 455                         // TODO Auto-generated method stub\r
 456                         return null;\r
 457                 }\r
 458 \r
 459                 public StringBuffer getRequestURL() {\r
 460                         // TODO Auto-generated method stub\r
 461                         return null;\r
 462                 }\r
 463 \r
 464                 public String getServletPath() {\r
 465                         // TODO Auto-generated method stub\r
 466                         return null;\r
 467                 }\r
 468 \r
 469                 public HttpSession getSession(boolean create) {\r
 470                         // TODO Auto-generated method stub\r
 471                         return null;\r
 472                 }\r
 473 \r
 474                 public HttpSession getSession() {\r
 475                         // TODO Auto-generated method stub\r
 476                         return null;\r
 477                 }\r
 478 \r
 479                 public boolean isRequestedSessionIdValid() {\r
 480                         // TODO Auto-generated method stub\r
 481                         return false;\r
 482                 }\r
 483 \r
 484                 public boolean isRequestedSessionIdFromCookie() {\r
 485                         // TODO Auto-generated method stub\r
 486                         return false;\r
 487                 }\r
 488 \r
 489                 public boolean isRequestedSessionIdFromURL() {\r
 490                         // TODO Auto-generated method stub\r
 491                         return false;\r
 492                 }\r
 493 \r
 494                 public boolean isRequestedSessionIdFromUrl() {\r
 495                         // TODO Auto-generated method stub\r
 496                         return false;\r
 497                 }\r
 498 \r
 499                 @Override\r
 500                 public ServletContext getServletContext() {\r
 501                         // TODO Auto-generated method stub\r
 502                         return null;\r
 503                 }\r
 504 \r
 505                 @Override\r
 506                 public AsyncContext startAsync() throws IllegalStateException {\r
 507                         // TODO Auto-generated method stub\r
 508                         return null;\r
 509                 }\r
 510 \r
 511                 @Override\r
 512                 public AsyncContext startAsync(ServletRequest servletRequest,\r
 513                                 ServletResponse servletResponse) throws IllegalStateException {\r
 514                         // TODO Auto-generated method stub\r
 515                         return null;\r
 516                 }\r
 517 \r
 518                 @Override\r
 519                 public boolean isAsyncStarted() {\r
 520                         // TODO Auto-generated method stub\r
 521                         return false;\r
 522                 }\r
 523 \r
 524                 @Override\r
 525                 public boolean isAsyncSupported() {\r
 526                         // TODO Auto-generated method stub\r
 527                         return false;\r
 528                 }\r
 529 \r
 530                 @Override\r
 531                 public AsyncContext getAsyncContext() {\r
 532                         // TODO Auto-generated method stub\r
 533                         return null;\r
 534                 }\r
 535 \r
 536                 @Override\r
 537                 public DispatcherType getDispatcherType() {\r
 538                         // TODO Auto-generated method stub\r
 539                         return null;\r
 540                 }\r
 541 \r
 542                 @Override\r
 543                 public boolean authenticate(HttpServletResponse response)\r
 544                                 throws IOException, ServletException {\r
 545                         // TODO Auto-generated method stub\r
 546                         return false;\r
 547                 }\r
 548 \r
 549                 @Override\r
 550                 public void login(String username, String password)\r
 551                                 throws ServletException {\r
 552                         // TODO Auto-generated method stub\r
 553                         \r
 554                 }\r
 555 \r
 556                 @Override\r
 557                 public void logout() throws ServletException {\r
 558                         // TODO Auto-generated method stub\r
 559                         \r
 560                 }\r
 561 \r
 562                 @Override\r
 563                 public Collection<Part> getParts() throws IOException, ServletException {\r
 564                         // TODO Auto-generated method stub\r
 565                         return null;\r
 566                 }\r
 567 \r
 568                 @Override\r
 569                 public Part getPart(String name) throws IOException, ServletException {\r
 570                         // TODO Auto-generated method stub\r
 571                         return null;\r
 572                 }\r
 573                 \r
 574         }\r
 575 }\r