私有方法六

/**
     * @author : lKF35745
     * @version: 1.0
     * <p>时间 : 2011-1-22</p>
     * <p>描述 :根据DstScreen ID得到自己所在的会议ID</p>
     * <p>Copyright 1988-2005, Huawei Tech. Co., Ltd.</p>
     * @return
     */
    private String getDstScreenConferenID(ParticipantID dstScreenParticipantId)
    {
        if (logger.isDebugEnabled())
        {
            logger.debug("begin to getDstScreenConferenID");
        }
        
        //得到DstScreen的会议ID
        String dstScreenConferID = getConferenceIdByPartId(dstScreenParticipantId);
        
        if (null == dstScreenConferID)
        {
            logger.warn("get the dstScreenConferID is null");
            return null;
        }
        
        if (logger.isDebugEnabled())
        {
            logger.debug("end to getDstScreenConferenID and result"
                    + dstScreenConferID);
        }
        
        return dstScreenConferID;
    }