@startuml

:Run recipe;
if (maven-compiler-plugin defined) then (false)
  stop
else (true)
  :analyze plugin;
  if (source and target version differ) then (true)
  stop
  else (false)


    if (Uses maven.compiler.* properties) then (true)
      :set java.version property to
      value of maven.compiler.source;
    else (false)
      if (uses custom property for version) then (true)
          :set java.version property to
          value of custom property;
          :set source and target to
          maven.compiler.source and
          maven.compiler.target;
        if (custom property used elsewehere) then (true)
          :replace occurrences with java.version;
        endif
      else (false)
        :read fixed value;
        :set java.version property to
        fixed value;
        :set source and target to
        maven.compiler.source and
        maven.compiler.target;
      endif
    endif
    :remove maven.compiler.* from properties;
    :only java.version and no maven.compiler.* property defined
    and maven-compiler-plugin uses maven.compiler.* properties;
    stop
  endif
endif
@enduml