Array Size Constraint Affects Individual Element Length

import jakarta.validation.constraints.Size;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.util.Set;

@RestController
class FooController {

    @GetMapping("/foo")
    public ResponseEntity<String> foo(@Size(min = 1, max = 3) @RequestParam Set<String> strings) {
        return ResponseEntity.ok("Foo!");
    }
}

@Size(min = 1, max = 3) from the snippet above is java bean validation annotation, which restricts the size of a set. swagger-ui applies this constraint not only to an array, but also to the individual element of it, making it impossible to pass a string containing more than given number of characters.

Q&A (please complete the following information)

• OS: Windows, MacOS
• Browser: any
• Swagger-UI version: 5.2.0

To reproduce...

Steps to reproduce the behavior:

1. Go to dedicated GitHub project and clone it to your device.
2. Build the project using Java 17 and Gradle 8.4
3. Click on 'Run SwaggerIssueApplication.main()'
4. Open link in your browser
5. Scroll down to GET foo and type string with more than 3 characters
6. See error

Expected behavior

The size of string should not be limited.

Screenshots

Start by reproducing the behavior with the linked swagger-issue project and its Swagger UI page, using the Java 17 and Gradle 8.4 setup described. Trace how the generated array schema applies the @Size constraint to the array and its string items. Done means strings longer than three characters are accepted while the set's minimum and maximum item counts remain enforced.