Plantuml 中的嵌套 if 语句答案

【问题标题】：Nested if statement in plantumlPlantuml 中的嵌套 if 语句
【发布时间】：2021-06-11 16:27:22
【问题描述】：

我正在尝试在 plantuml 中执行嵌套 if 语句。代码如下：

@startuml
start
:Search for File;
if(Is in local cache?) then (yes)
    :Finish;
    stop
else (no)
    :Check Cached SearchObjectToNodeTb;
        if(Find in SearchObjectToNodeTb) then (yes)
            :Send refresh req. SO to SN;
        else(No)
            :Send SO query to closest SymbolToNodeCacheTb match;
            if(Symbol in Table) then (yes)
                switch(What role am I?)
                    case(SearchNode)
                        :Send out Query to SN and get SearchObject;
                    case(FileNode)
                        :Return results;
            else(No)//can't find the if statement for here
                switch(What role am I?)
                    case(client)
                        :Send to Node with closest result;
                    case(SearchNode)
                        :Perform alg. for tablesym. creation;


@enduml

它看不到 else 的最后一个 if 语句。是否可以在 Plantuml 中进行嵌套 if else 语句？

【问题讨论】：

标签： plantuml

【解决方案1】：

据我所知，endswitch（参见例如https://plantuml.com/activity-diagram-beta）对我来说缺少以下作品：

@startuml
start
:Search for File;
if(Is in local cache?) then (yes)
    :Finish;
    stop
else (no)
    :Check Cached SearchObjectToNodeTb;
        if(Find in SearchObjectToNodeTb) then (yes)
            :Send refresh req. SO to SN;
        else(No)
            :Send SO query to closest SymbolToNodeCacheTb match;
            if(Symbol in Table) then (yes)
                switch(What role am I?)
                    case(SearchNode)
                        :Send out Query to SN and get SearchObject;
                    case(FileNode)
                        :Return results;
                endswitch
            else(No)
                switch(What role am I?)
                    case(client)
                        :Send to Node with closest result;
                    case(SearchNode)
                        :Perform alg. for tablesym. creation;
                endswitch
@enduml

【讨论】：