Hacktoberfest 2026: the issues maintainers tagged for October, open and beginner-friendly. Browse Hacktoberfest issues

Why is oneOf a `Set<Object>`?

Open
#99 0 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
42/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
java
Domain
backend

Research direction

Start at ContainerTypeSchema#oneOf and the JsonSchema type, then compare their declarations with the oneOf requirement in the linked JSON Schema Validation specification. Done means determining whether the collection is typed consistently with the specification and updating the affected representation if confirmed.

Written by the indexing model from the issue text.

Description

Looking at the JSON Schema Validation spec oneOf section:

Elements of the array MUST be objects. Each object MUST be a valid JSON Schema.

Shouldn't ContainerTypeSchema#oneOf therefore be a Set<JsonSchema>?

Dominant language
Java
Stars
387
Forks
138
PR merge metrics
No merged PRs in 30d

Getting set up

This project ships no dev container, Dockerfile or contributing guide, so setting up is up to you: start from its README, and see our first-contribution guide for the general steps.

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

More from FasterXML/jackson-module-jsonSchema

All issues in FasterXML/jackson-module-jsonSchema

Similar issues

More Java issues

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.