mule-studio - splitBy regex 问题 dataweave 2.0

Question

我正在尝试使用 dataweave 2.0 中的 splitBy 拆分点符号字符串，使用简单的正则表达式来避免拆分转义字符串，在线测试正则表达式按预期工作，但 dataweave 函数输出不同的结果。

'root.sources.data.`jenkins.branch.BranchSource`.source.traits' splitBy(/[^\.`]+|"([^`]*)"|`([^`]*)`/)

输出:

["", ".", ".", ".", ".", "." ]

预期的:

["root", "sources", "data", "`jenkins.branch.BranchSource`", "source, "traits"]

Answer 1

您可以尝试使用先行检查是否存在`

'root.sources.data.`jenkins.branch.BranchSource`.source.traits' splitBy(/[.](?=(?:[^`]*`[^`]*`)*[^`]*$)/)

这将导致

[
  "root" as String {class: "java.lang.String"}, 
  "sources" as String {class: "java.lang.String"}, 
  "data" as String {class: "java.lang.String"}, 
  "`jenkins.branch.BranchSource`" as String {class: "java.lang.String"}, 
  "source" as String {class: "java.lang.String"}, 
  "traits" as String {class: "java.lang.String"}
] as Array {encoding: "UTF-8", mediaType: "*/*", mimeType: "*/*", class: "java.util.ArrayList"}