Kotlin: How to map URL with Regex

Question

I want to map Slug URL with Regex URL mentioned below.

Regex URL - /openPage/*/*
Slug URL -/openPage/{category}/{subCategory}
URL - /openPage/ABC/XYZ

where after pattern matching, I should get like, category = ABC subCategory = XYZ

Any help would be appreciated.

Look into substrings of regex. You can match and extract substrings using ( and ). — shkschneider
– shkschneider, Commented Oct 29, 2019 at 9:08
Is there a reason you want to use a regex? They are great if you have a unique pattern match problem to solve, but if it's a standard thing (like URLs) there is almost certainly a library that can do it for you more easily — matt freake
– matt freake, Commented Oct 29, 2019 at 9:23

pshegger · Accepted Answer · 2019-10-29 09:31:48Z

3

You should look into matching groups in Regex. They can be used to get specific parts of a regular expression after matching. For more info you can read this. For your use-case you can use the following Regex:

\/openPage\/([^\/]+)\/([^\/]+)

Regular expression visualization

Debuggex Demo

And here's how you can do that in Kotlin:

val regex = "\\/openPage\\/([^\\/]+)\\/([^\\/]+)".toRegex()
val match = regex.matchEntire("/openPage/ABC/XYZ")
val category = match?.groups?.get(1)?.value
val subCategory = match?.groups?.get(2)?.value

This way you will have your category and subCategory as String?.

answered Oct 29, 2019 at 9:31

pshegger

2,60625 silver badges29 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Kotlin: How to map URL with Regex

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related