Query array arguments type conversion does not work after migrating to Micronaut 4.2.x from 3.8.x

[VitaliPareika]

Expected Behavior

@Client(value = "${server.url}", alpnModes = HttpVersionSelection.ALPN_HTTP_2) public interface SomeClient {

@Get("/v2/invoices?sort[]=updated_time.desc&page_size=20")
HttpResponse<InvoicesResponse> getInvoicesByUpdateTime(@QueryValue("filter[]") String[] filter);

}

When calling this client method with argument String[] filter = ["state.EQ:posted", "account_id.EQ:123"] I would expect the following query value should be added to result query as: '&filter[]=state.EQ:posted,account_id.EQ:123'. Filter elements separated by comma in the query and this works fine when using Micronaut 3.8.x and Amazon Corretto 11

Actual Behaviour

@Client(value = "${server.url}", alpnModes = HttpVersionSelection.ALPN_HTTP_2) public interface SomeClient {

@Get("/v2/invoices?sort[]=updated_time.desc&page_size=20")
HttpResponse<InvoicesResponse> getInvoicesByUpdateTime(@QueryValue("filter[]") String[] filter);

}

When calling this client method with argument String[] filter = ["state.EQ:posted", "account_id.EQ:123"] the following query value is added to result query as: '&filter[]=state.EQ:postedaccount_id.EQ:123'. Filter elements not separated by comma in the query when using Micronaut 4.2.x and Amazon Corretto 17

When I've used List instead of String[] filter elements are separated by comma in the query.

Steps To Reproduce

• Migrate a Micronaut project using HTTP client from version 3.8.x to 4.2.x.
• Implement a custom HTTP client method with following argument: @QueryValue("filter[]") String[] filter)
• Pass the String array to this method and examine generated query.

Environment Information

• Micronaut Version: 4.2.x
• JDK Version: 17

Example Application

No response

Version

4.2.1

[VitaliPareika]

[VitaliPareika]

Not a bug. It's our codebase issue.