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@startuml
skinparam BackgroundColor F0F0F0
participant "ConcreteTree" as ct
participant "ConcreteWalker" as cw
participant "ConcreteVisitor" as cv
participant "gui::Item" as item
[o->cw : traverse(root)
create ct
activate cw #DarkGreen
ct <- cw : <<create>>(root)
activate ct #DarkGreen
create cv
cw -> cv : <<create>>
activate cv #DarkGreen
loop tree::hasNext()
ct <- cw : getNext
activate ct #LimeGreen
ct - -> cw : node
deactivate ct
cw -> item : accept(visitor)
activate item #DarkGreen
cv <- item : visit(*this)
activate cv #LimeGreen
cv -> item : interaction
activate item #LimeGreen
cv <- - item
deactivate item
cv - -> item
deactivate cv
cw <- - item
deactivate item
cw -> cv : <<concrete interaction>>
activate cv #LimeGreen
cw <- - cv
deactivate cv
end
cw -x cv : <<delete>>
deactivate cv
ct x- cw : <<delete>>
deactivate ct
@enduml
PlantUML version 1.2020.02(Sun Mar 01 05:22:07 EST 2020)
(GPL source distribution)
Java Runtime: OpenJDK Runtime Environment
JVM: OpenJDK 64-Bit Server VM
Java Version: 11.0.12+7-post-Debian-2
Operating System: Linux
Default Encoding: UTF-8
Language: en
Country: US
--></g></svg>
