// DaoMetaDataFactory
    public DaoMetaData getDaoMetaData(final Class daoClass) {
        if (!initialized) {
            DisposableUtil.add(this);
            initialized = true;
        }
        final String key = daoClass.getName();
		
		// [A]
        DaoMetaData dmd = getSynchronizedDaoMetaDataCache(key);
		
		// [B]
        if (dmd != null) {
            return dmd;
        }
		
		// [C]
		synchronized (_daoMetaDataInitializationLockMonitor) {// One Thread Only Entered
		    // [D]
		    dmd = getSynchronizedDaoMetaDataCache(key);
			// [E]
			if (dmd != null) {
			    // The second thread that stops at [C] can find
				// because the first thread have already initialized.
				if (_log.isDebugEnabled()) {
				    _log.debug("...Getting daoMetaData as cache because the previous thread have already initilized.");
				}
                return dmd;
            }
			// [F]
			if (_log.isDebugEnabled()) {
			    _log.debug("...Initializing daoMetaData.");
			}
            final DaoMetaData dmdi = createDaoMetaData(daoClass);
			putSynchronizedDaoMetaDataCache(key, dmdi);
		}
		// [G]
	    dmd = getSynchronizedDaoMetaDataCache(key);
        if (dmd != null) {
			if (_log.isDebugEnabled()) {
			    _log.debug("...Confirming that daoMetaData have been certainly initialized and cached.");
			}
            return dmd;
        }
		String msg = "The cache should have data meta data here: key=" + key + " cache=" + daoMetaDataCache;
        throw new IllegalStateException(msg);
    }

    // DaoMetaData
    public SqlCommand getSqlCommand(String methodName) throws MethodNotFoundRuntimeException {
        SqlCommand cmd = (SqlCommand) sqlCommands.get(methodName);
        if (cmd != null) {
            return cmd;
        }
        if (_internalDebug) {
            _log.debug("...Initializing sqlCommand: " + methodName);
        }
		synchronized (_methodInitializationLockMonitor) {
			cmd = (SqlCommand) sqlCommands.get(methodName);
            if (cmd != null) {
                return cmd;
            }
            cmd = initializeSqlCommand(methodName);
		}
		return cmd;
    }