Incompatibility of RFCs concerning URI formatting

[testower]

JSON schema string format uri uses https://tools.ietf.org/html/rfc3986 which allows an empty authority, but the java type java.net.URI uses the obsolete https://tools.ietf.org/html/rfc2396 which does not allow it. For example, android and ios discovery uris fails validation:

{
  "discoveryUri": "com.example.ios://"
}

Schema:

{
  "$schema": "http://json-schema.org/draft-2020-12/schema",
  "type": "object",
  "properties": {
    "uri": {
      "type": "string",
       "format": "uri"
    }
  }
}

Trying to validate this gives the following:

[com.example.ios://] is not a valid URI

I have asked a similar question here: joelittlejohn/jsonschema2pojo#1236 and the answer was that this is the best we can do given the state of the Java URI native class.

Would it be the same here? Is the solution to implement a custom format validator, or should this be fixed in the lib?

Naïve fix:

    @Override
    public Optional<String> validate(String subject) {
        try {
            new URI(subject);
            return Optional.empty();
        } catch (URISyntaxException e) {
            if (e.getReason().equalsIgnoreCase("expected authority")) {
                return Optional.empty();
            }
        }
        return Optional.of("Invalid URI");
    }

[erosb]

Hello, if you plan to raise a PR with a standard-compliant URI format validator then I don't mind merging it, but I don't plan to fix this issue on my own.

[testower]

No problem, I understand. I think I will go with the naïve fix in an override for now 👍