Jackson Bukkit

Jackson Bukkit teaches Jackson how to read and write Bukkit and Paper types like Location, ItemStack or Color. It is a Jackson module, so you register it on Ocular like any other module.

Add Jackson Bukkit to your plugin as its documentation describes. Then pass the module to the builder:

Key<PluginConfig> main = Key.builder(Path.of("config.yml"), PluginConfig::new).build();

Configurations<PluginConfig> configurations = Configurations.builder(main, new YamlDataFormat())
        .setBase(getDataFolder().toPath())
        .withClassLoader(getClass().getClassLoader())
        .addModule(JacksonPaper.builder().build())
        .build();

Use JacksonBukkit instead of JacksonPaper if your plugin also runs on Spigot.

Set the class loader to the one of your plugin, so Jackson finds your plugin's classes. By default Ocular uses the context class loader of the current thread.