content: /*
  * Conditions Of Use
  *
  * This software was developed by employees of the National Institute of
  * Standards and Technology (NIST), an agency of the Federal Government.
  * Pursuant to title 15 Untied States Code Section 105, works of NIST
  * employees are not subject to copyright protection in the United States
  * and are considered to be in the public domain.  As a result, a formal
  * license is not needed to use the software.
  *
  * This software is provided by NIST as a service and is expressly
  * provided "AS IS."  NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
  * OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
  * AND DATA ACCURACY.  NIST does not warrant or make any representations
  * regarding the use of the software or the results thereof, including but
  * not limited to the correctness, accuracy, reliability or usefulness of
  * the software.
  *
  * Permission to use this software is contingent upon your acceptance
  * of the terms of this agreement
  *
  * .
  *
  */
  /************************************************************************************************
   * PRODUCT OF PT INOVACAO - EST DEPARTMENT and Telecommunications Institute (Aveiro, Portugal)  *
   ************************************************************************************************/
  
  
  package gov2.nist.javax2.sip.parser.ims;
  
  /**
   * Security Agreement for SIP.
   * <p>headers: Security-Client, Security-Server and Security-Verify</p>
   *
   * @author Miguel Freitas (IT) PT-Inovacao
   */
  
  
  import gov2.nist.core.NameValue;
  import gov2.nist.core.Token;
  import gov2.nist.javax2.sip.header.SIPHeaderList;
  import gov2.nist.javax2.sip.header.ims.*;
  import gov2.nist.javax2.sip.parser.HeaderParser;
  import gov2.nist.javax2.sip.parser.Lexer;
  import gov2.nist.javax2.sip.parser.TokenTypes;
  
  import java.text.ParseException;
  
  
  
  public class SecurityAgreeParser extends HeaderParser
  {
  
      public SecurityAgreeParser(String security) {
          super(security);
      }
  
  
      protected SecurityAgreeParser(Lexer lexer) {
          super(lexer);
      }
  
  
      protected void parseParameter(SecurityAgree header)
          throws ParseException
      {
          if (debug)
              dbg_enter("parseParameter");
          try {
              NameValue nv = this.nameValue('=');
              header.setParameter(nv);
          } finally {
              if (debug)
                  dbg_leave("parseParameter");
          }
      }
  
  
      public SIPHeaderList parse(SecurityAgree header) throws ParseException
      {
  
          SIPHeaderList list;
  
          if (header.getClass().isInstance(new SecurityClient())) {
              list = new SecurityClientList();
          } else if (header.getClass().isInstance(new SecurityServer())) {
              list = new SecurityServerList();
          } else if (header.getClass().isInstance(new SecurityVerify())) {
              list = new SecurityVerifyList();
          }
          else
              return null;
  
  
          // the security-mechanism:
          this.lexer.SPorHT();
          lexer.match(TokenTypes.ID);
          Token type = lexer.getNextToken();
          header.setSecurityMechanism(type.getTokenValue());
          this.lexer.SPorHT();
  
          char la = lexer.lookAhead(0);
          if (la == '\n')
          {
              list.add(header);
              return list;
          }
          else if (la == ';')
              this.lexer.match(';');
  
          this.lexer.SPorHT();
  
          // The parameters:
          try {
              while (lexer.lookAhead(0) != '\n') {
  
                  this.parseParameter(header);
                  this.lexer.SPorHT();
                  char laInLoop = lexer.lookAhead(0);
                  if (laInLoop == '\n' || laInLoop == '\0')
                      break;
                  else if (laInLoop == ',')
                  {
                      list.add(header);
                      if (header.getClass().isInstance(new SecurityClient())) {
                          header = new SecurityClient();
                      } else if (header.getClass().isInstance(new SecurityServer())) {
                          header = new SecurityServer();
                      } else if (header.getClass().isInstance(new SecurityVerify())) {
                          header = new SecurityVerify();
                      }
  
                      this.lexer.match(',');
                      // the security-mechanism:
                      this.lexer.SPorHT();
                      lexer.match(TokenTypes.ID);
                      type = lexer.getNextToken();
                      header.setSecurityMechanism(type.getTokenValue());
  
                  }
                  this.lexer.SPorHT();
  
                  if (lexer.lookAhead(0) == ';')
                      this.lexer.match(';');
  
                  this.lexer.SPorHT();
  
              }
              list.add(header);
  
              return list;
  
          } catch (ParseException ex) {
              throw ex;
          }
  
  
      }
  
  
  
  
  }
  
  
  