import com.sun.org.omg.SendingContext.CodeBaseHelper; //导入依赖的package包/类
private synchronized boolean connectedCodeBase() {
    if (delegate != null)
        return true;

    // The delegate was null, so see if the connection's
    // IOR was set.  If so, then we just need to connect
    // it.  Otherwise, there is no hope of checking the
    // remote code base.  That could be bug if the
    // service context processing didn't occur, or it
    // could be that we're talking to a foreign ORB which
    // doesn't include this optional service context.
    if (conn.getCodeBaseIOR() == null) {
        // REVISIT.  Use Merlin logging service to report that
        // codebase functionality was requested but unavailable.
        if (conn.getBroker().transportDebugFlag)
            conn.dprint("CodeBase unavailable on connection: " + conn);

        return false;
    }

    synchronized(iorMapLock) {

        // Recheck the condition to make sure another
        // thread didn't already do this while we waited
        if (delegate != null)
            return true;

        // Do we have a reference initialized by another connection?
        delegate = CachedCodeBase.iorMap.get(conn.getCodeBaseIOR());

        if (delegate != null)
            return true;

        // Connect the delegate and update the cache
        delegate = CodeBaseHelper.narrow(getObjectFromIOR());

        // Save it for the benefit of other connections
        CachedCodeBase.iorMap.put(conn.getCodeBaseIOR(), delegate);
    }

    // It's now safe to use the delegate
    return true;
}