Generate bean validation regex pattern

[shailendrajain24]

Below method create a problem when we generate pattern regex in our code.
Problem is generate contain extra '' when we apply bean validation @pattern like that :- /[a-zA-Z]/

public String addRegularExpressionDelimiter(String pattern) {
if (pattern != null && !pattern.matches("^/.*")) {
return "/" + pattern + "/";
}

    return pattern;
}

Location of source file line number 3285 : https://github.com/swagger-api/swagger-codegen/blob/master/modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java#L3285

My question is that any specific reason to add this method because this method is newly introduce.

[wing328]

@shailendrajain24 it's based on the discussion here: #2794

Is it causing any issue to your use case?

[shailendrajain24]

Jersey bean validation does not work with this /[a-zA-Z]/ pattern.

[mgriego]

We've run into a similar issue. We're validating a path string on a model, so the regular expression is [/a-zA-Z0-9_-]+. Since the code above doesn't escape the provided pattern, the / in the pattern ends up with an invalid regex: /[/a-zA-Z0-9_-]+/.

[wing328]

@mgriego @shailendrajain24 What about overriding addRegularExpressionDelimiter to not add any "/" in AbstractJavaCodegen.java ? Would that resolve the issue for you guys?

cc @jfiala @cbornet

[wing328]

Closing this as there's no update.

Please pull the latest to give it another try as I've add some additional logic to better handle pattern.