@startuml
participant configurexml
activate configurexml
participant "locobufferusb..ConnectionConfigXml\nextends AbstractSerialConnectionConfigXml\nextends AbstractConnectionConfigXml" as ConnectionConfigXml
participant "locobufferusb.LocoBufferUsbAdapter\nextends LocoBufferAdapter\nimplements jmri.jmrix.SerialPortAdapter" as LocoBufferUsbAdapter
participant "locobufferusb.ConnectionConfig\nextends AbstractSerialConnectionConfig\nextends AbstractConnectionConfig" as ConnectionConfig

...

configurexml -> ConnectionConfigXml: null ctor (via reflection)
activate ConnectionConfigXml
deactivate ConnectionConfigXml

configurexml -> ConnectionConfigXml: load()
activate ConnectionConfigXml

ConnectionConfigXml -> ConnectionConfigXml: getInstance()
activate ConnectionConfigXml

ConnectionConfigXml -> LocoBufferUsbAdapter:  null ctor
activate LocoBufferUsbAdapter
deactivate LocoBufferUsbAdapter
note left LocoBufferUsbAdapter: Assigned to "adapter" member
note left LocoBufferUsbAdapter #FFAAAA: Which object is "adapter" in?
deactivate ConnectionConfigXml

ConnectionConfigXml -> ConnectionConfigXml : loadCommon()
activate ConnectionConfigXml
ConnectionConfigXml -> ConnectionConfigXml : loadOptions()
activate ConnectionConfigXml
ConnectionConfigXml -> LocoBufferUsbAdapter : setOptionState(name, value)
activate LocoBufferUsbAdapter
deactivate LocoBufferUsbAdapter
deactivate ConnectionConfigXml
deactivate ConnectionConfigXml

ConnectionConfigXml -> ConnectionConfigXml : register()
activate ConnectionConfigXml
ConnectionConfigXml -> ConnectionConfigXml : register(new ConnectionConfig(adapter))
activate ConnectionConfigXml
ConnectionConfigXml -> ConnectionConfig : ctor
activate ConnectionConfig
deactivate ConnectionConfig
ConnectionConfigXml -> ConnectionConfig: register()
activate ConnectionConfig
ConnectionConfig -> ConnectionConfig : setInstance()
activate ConnectionConfig
note right ConnectionConfig
    If adapter member not already set,
    create and store a new LocoBufferUsbAdapter
end note
note left ConnectionConfig #FFAAAA: Which object is "adapter" in?
deactivate ConnectionConfig
deactivate ConnectionConfig
deactivate ConnectionConfigXml
deactivate ConnectionConfigXml
note right ConnectionConfigXml
    At this point, we have a ConnectionConfig object 
    configured and registered for later persistance
    when e.g. the preferences are stored
end note
ConnectionConfigXml -> LocoBufferUsbAdapter: openPort()
activate LocoBufferUsbAdapter
LocoBufferUsbAdapter -> LocoBufferUsbAdapter : various calls
LocoBufferUsbAdapter -> LocoBufferUsbAdapter
deactivate LocoBufferUsbAdapter

ConnectionConfigXml -> LocoBufferUsbAdapter : configure()
activate LocoBufferUsbAdapter
deactivate LocoBufferUsbAdapter

deactivate ConnectionConfigXml

deactivate configurexml

@enduml