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 NIST/ITL Advanced Networking Technologies Division (ANTD).        *
  *******************************************************************************/
  package gov2.nist.javax2.sip.header;
  
  import javax2.sip.header.*;
  
  import java.text.ParseException;
  
  /**
  * Event SIP Header.
  *
  *@version 1.2 $Revision: 1.7 $ $Date: 2007/06/28 15:08:42 $
  *@since 1.1
  *
  *@author M. Ranganathan   <br/>
  *@author Olivier Deruelle <br/>
  *
  *
  */
  public class Event extends ParametersHeader implements EventHeader {
  
      /**
       * Comment for <code>serialVersionUID</code>
       */
      private static final long serialVersionUID = -6458387810431874841L;
  
      protected String eventType;
  
      /**
       * Creates a new instance of Event
       */
      public Event() {
          super(EVENT);
      }
  
      /**
      * Sets the eventType to the newly supplied eventType string.
      *
      * @param eventType - the  new string defining the eventType supported
      * in this EventHeader
      * @throws ParseException which signals that an error has been reached
      * unexpectedly while parsing the eventType value.
      */
      public void setEventType(String eventType) throws ParseException {
          if (eventType == null)
              throw new NullPointerException(" the eventType is null");
          this.eventType = eventType;
      }
  
      /**
       * Gets the eventType of the EventHeader.
       *
       * @return the string object identifing the eventType of EventHeader.
       */
      public String getEventType() {
          return eventType;
      }
  
      /**
       * Sets the id to the newly supplied <var>eventId</var> string.
       *
       * @param eventId - the new string defining the eventId of this EventHeader
       * @throws ParseException which signals that an error has been reached
       * unexpectedly while parsing the eventId value.
       */
      public void setEventId(String eventId) throws ParseException {
          if (eventId == null)
              throw new NullPointerException(" the eventId parameter is null");
          setParameter(ParameterNames.ID, eventId);
      }
  
      /**
       * Gets the id of the EventHeader. This method may return null if the
       * "eventId" is not set.
       * @return the string object identifing the eventId of EventHeader.
       */
      public String getEventId() {
          return getParameter(ParameterNames.ID);
      }
  
      /**
       * Encode in canonical form.
       * @return String
       */
      public String encodeBody() {
          return encodeBody(new StringBuffer()).toString();
      }
  
      protected StringBuffer encodeBody(StringBuffer buffer) {
          if (eventType != null)
              buffer.append(eventType);
  
          if (!parameters.isEmpty()) {
              buffer.append(SEMICOLON);
              this.parameters.encode(buffer);
          }
          return buffer;
      }
  
      /**
       *  Return true if the given event header matches the supplied one.
       *
       * @param matchTarget -- event header to match against.
       */
      public boolean match(Event matchTarget) {
          if (matchTarget.eventType == null && this.eventType != null)
              return false;
          else if (matchTarget.eventType != null && this.eventType == null)
              return false;
          else if (this.eventType == null && matchTarget.eventType == null)
              return false;
          else if (getEventId() == null && matchTarget.getEventId() != null)
              return false;
          else if (getEventId() != null && matchTarget.getEventId() == null)
              return false;
          return matchTarget.eventType.equalsIgnoreCase(this.eventType)
              && ((this.getEventId() == matchTarget.getEventId())
                  || this.getEventId().equalsIgnoreCase(matchTarget.getEventId()));
      }
  }
  