私有方法五

 /**     * @author : lKF35745     * @version: 1.0     * <p>时间 : 2011-1-6</p>     * <p>描述 : 根据与会者ID查询出自己所在的会议</p>     * <p>Copyright 1988-2005, Huawei Tech. Co., Ltd.</p>     * @param  ParticipantID 与会者编号     * @return ConferenceID 子会议编号      */    private String getConferenceIdByPartId(final ParticipantID participantID)    {        if (logger.isDebugEnabled())        {            logger.debug("begin getSubConferenceIDByParticipantID and param: "                    + participantID);        }                if (null == participantID)        {            logger.warn("ParticipantID is null ");            return null;        }                //根据与会者编号找到与会者信息类        ParticipantInfo participantInfo = Activator.getConferenceService()                .getParticipantInfo(participantID);                if (null == participantInfo)        {            logger.warn("get ParticipantInfo Object is null.");            return null;        }        //得到会议编号        String conferenceID = participantInfo.getConferenceID().getId();                if (null == conferenceID)        {            logger.warn("get conferenceID is null.");            return null;        }                if (logger.isDebugEnabled())        {            logger                    .debug("end beagin getSubConferenceIDByParticipantID conferenceID value is "                            + conferenceID);        }        return conferenceID;    }

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