import com.sun.corba.se.spi.servicecontext.MaxStreamFormatVersionServiceContext; //导入依赖的package包/类
/**
 * If the RMI-IIOP maximum stream format version service context
 * is present, it indicates the maximum stream format version we
 * could use for the reply.  If it isn't present, the default is
 * 2 for GIOP 1.3 or greater, 1 for lower.
 *
 * This is only sent on requests.  Clients can find out the
 * server's maximum by looking for a tagged component in the IOR.
 */
public byte getStreamFormatVersionForReply() {

    // NOTE: The request service contexts may indicate the max.
    ServiceContexts svc = getRequestServiceContexts();

    MaxStreamFormatVersionServiceContext msfvsc
        = (MaxStreamFormatVersionServiceContext)svc.get(
            MaxStreamFormatVersionServiceContext.SERVICE_CONTEXT_ID);

    if (msfvsc != null) {
        byte localMaxVersion = ORBUtility.getMaxStreamFormatVersion();
        byte remoteMaxVersion = msfvsc.getMaximumStreamFormatVersion();

        return (byte)Math.min(localMaxVersion, remoteMaxVersion);
    } else {
        // Defaults to 1 for GIOP 1.2 or less, 2 for
        // GIOP 1.3 or higher.
        if (getGIOPVersion().lessThan(GIOPVersion.V1_3))
            return ORBConstants.STREAM_FORMAT_VERSION_1;
        else
            return ORBConstants.STREAM_FORMAT_VERSION_2;
    }
}
 

import com.sun.corba.se.spi.servicecontext.MaxStreamFormatVersionServiceContext; //导入依赖的package包/类
protected void addServiceContexts(CorbaMessageMediator messageMediator)
{
    ORB orb = (ORB)messageMediator.getBroker();
    CorbaConnection c = (CorbaConnection) messageMediator.getConnection();
    GIOPVersion giopVersion = messageMediator.getGIOPVersion();

    ServiceContexts contexts = messageMediator.getRequestServiceContexts();

    addCodeSetServiceContext(c, contexts, giopVersion);

    // Add the RMI-IIOP max stream format version
    // service context to every request.  Once we have GIOP 1.3,
    // we could skip it since we now support version 2, but
    // probably safer to always send it.
    contexts.put(MaxStreamFormatVersionServiceContext.singleton);

    // ORBVersion servicecontext needs to be sent
    ORBVersionServiceContext ovsc = new ORBVersionServiceContext(
                    ORBVersionFactory.getORBVersion() ) ;
    contexts.put( ovsc ) ;

    // NOTE : We only want to send the runtime context the first time
    if ((c != null) && !c.isPostInitialContexts()) {
        // Do not do c.setPostInitialContexts() here.
        // If a client interceptor send_request does a ForwardRequest
        // which ends up using the same connection then the service
        // context would not be sent.
        SendingContextServiceContext scsc =
            new SendingContextServiceContext( orb.getFVDCodeBaseIOR() ) ; //d11638
        contexts.put( scsc ) ;
    }
}
 

import com.sun.corba.se.spi.servicecontext.MaxStreamFormatVersionServiceContext; //导入依赖的package包/类
private void initServiceContextRegistry( ORB orb )
{
    ServiceContextRegistry scr = orb.getServiceContextRegistry() ;

    scr.register( UEInfoServiceContext.class ) ;
    scr.register( CodeSetServiceContext.class ) ;
    scr.register( SendingContextServiceContext.class ) ;
    scr.register( ORBVersionServiceContext.class ) ;
    scr.register( MaxStreamFormatVersionServiceContext.class ) ;
}