私有方法九

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