ReplaceAll method is not working correctly - replace regex with regex pattern

Question

I saw plenty of questions regarding problem with replaceAll but it didn't work for me. I would like to replace occurance of particular pattern with pattern itself (so later on I will be able to run sql and find similiar records based on regex value) by given:

https://internal-gateway.com/users/4e8a4741-dd89-4cdd-a7c3-3b2f7044e142

it shoud return

https://internal-gateway.com/users/[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89AB][0-9a-f]{3}-[0-9a-f]{12}

my code:

private final static String UUID_PATTERN = "[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89AB][0-9a-f]{3}-[0-9a-f]{12}";
private final static String SIM_NUMBER_PATTERN = "894803[0-9]{13}";
private final static String MSISDN_SHORT_PATTERN = "[0-9]{9}";
private final static String MSISDN_LONG_PATTERN = "[0-9]{11}";
private Optional<WebApp> checkRegexes(String url, Long id) {
    String urlToLookFor = url.replaceAll(UUID_PATTERN,UUID_PATTERN);
    urlToLookFor=urlToLookFor.replaceAll(SIM_NUMBER_PATTERN,SIM_NUMBER_PATTERN);
    urlToLookFor=urlToLookFor.replaceAll(MSISDN_LONG_PATTERN,MSISDN_LONG_PATTERN);
    urlToLookFor=urlToLookFor.replaceAll(MSISDN_SHORT_PATTERN,MSISDN_SHORT_PATTERN);

    return waRepository.getWebAppByRegex(urlToLookFor,id);
}

however in given example value replaceall is not replacing anything, can anyone give me a hint what is my mistake?

Your pattern doesn't match your value

Ayrton
– Ayrton

2019-10-14 11:27:36 +00:00
Commented Oct 14, 2019 at 11:27 — Ayrton
– Ayrton, Commented Oct 14, 2019 at 11:27
Your pattern doesn't match the value : regex101

AxelH
– AxelH

2019-10-14 11:28:43 +00:00
Commented Oct 14, 2019 at 11:28 — AxelH
– AxelH, Commented Oct 14, 2019 at 11:28

Ayrton · Accepted Answer · 2019-10-14 11:29:41Z

4

String.replaceAll() is case-sensitive, and your pattern doesn't match your string here:

[89AB][0-9a-f]{3}: "AB" is upper case

a7c3: "a" is lower case

Just replace [89AB] with [89ab], or use a case-insensitive pattern matching method.

answered Oct 14, 2019 at 11:29

Ayrton

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1 Comment

Mithrand1r Over a year ago

Didn't noticed that my regex testing plugin has disabled case sensitive ;/ thanks for pointing this out, it looks like adding (?i) before pattern in replaceAll worked !

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