import com.sun.xml.internal.ws.model.wsdl.WSDLProperties; //导入依赖的package包/类
private Stub(WSServiceDelegate owner, @Nullable Tube master, @Nullable WSPortInfo portInfo, BindingImpl binding, @Nullable WSDLPort wsdlPort, EndpointAddress defaultEndPointAddress, @Nullable WSEndpointReference epr) {
    this.owner = owner;
    this.portInfo = portInfo;
    this.wsdlPort = portInfo.getPort();
    this.binding = binding;
    addrVersion = binding.getAddressingVersion();
    // if there is an EPR, EPR's address should be used for invocation instead of default address
    if(epr != null)
        this.requestContext.setEndPointAddressString(epr.getAddress());
    else
        this.requestContext.setEndpointAddress(defaultEndPointAddress);
    this.engine = new Engine(toString(), owner.getExecutor());
    this.endpointReference = epr;
    wsdlProperties = (wsdlPort==null) ? null : new WSDLProperties(wsdlPort);

    // ManagedObjectManager MUST be created before the pipeline
    // is constructed.

    managedObjectManager = new MonitorRootClient(this).createManagedObjectManager(this);

    if(master != null)
        this.tubes = new TubePool(master);
    else
        this.tubes = new TubePool(createPipeline(portInfo, binding));

    // This needs to happen after createPipeline.
    // TBD: Check if it needs to happen outside the Stub constructor.
    managedObjectManager.resumeJMXRegistration();
}