CraftHub
FASTJSON2 Serializer for YACL

FASTJSON2 Serializer for YACL

A config serializer for YetAnotherConfigLib using FASTJSON2

15 748 downloads 3 followers
A serializer for YetAnotherConfigLib made using FASTJSON2.

Modrinth Downloads CurseForge Downloads

FASTJSON2 Serializer for YACL (fastjson4yacl) is a library mod to allow other mods to use FastJSON2 for config (de)serialization. On its own it does nothing, you need other mods to utilize fastjson4yacl.

FASTJSON2 Serializer for YACL is also available in Evening Star Lib

Join the Fluxer server for community & mod support

Useage


Add as a dependancy as outlined on the version page*
// >= 1.21.11
    public static ConfigClassHandler<Config> HANDLER = ConfigClassHandler.createBuilder(Config.class)
            .id(Identifier.fromNamespaceAndPath(MOD_ID, "config"))
            .serializer(config -> FastJsonConfigSerializerBuilder.create(config)
                    .setPath(YACLPlatform.getConfigDir().resolve("modid.json"))
                    .build())
            .build();

// <= 1.21.10
    public static ConfigClassHandler<Config> HANDLER = ConfigClassHandler.createBuilder(Config.class)
            .id(ResourceLoccation.fromNamespaceAndPath(MOD_ID, "config"))
            .serializer(config -> FastJsonConfigSerializerBuilder.create(config)
                    .setPath(YACLPlatform.getConfigDir().resolve("modid.json"))
                    .build())
            .build();

JSON5


FastJSON2 doesn't offer any support for JSON5. If you need/want JSON5 for any reason, I would suggest continuing to use YACL's built-in Gson serializer. If you are migrating from a Json5 config back to a regular Json here is an example of how to auto migrate your user's configs from my mod Am I Up To Date?:

Example 
// Replace file & field names with your mod's

public class ConfigMigration {
    public static void migrate(){
        try {
            if (Files.exists(Path.of(YACLPlatform.getConfigDir() + "/aiutd.json5"))){
                AIUTD.LOG.info("Pre-2.5.0 config found. Migrating...!");

                String JSONContent = Files.readString(Path.of(YACLPlatform.getConfigDir() + "/aiutd.json5"));
                JSONObject oldConfig = JSON.parseObject(JSONContent, JSONReader.Feature.AllowUnQuotedFieldNames);

                Config.HANDLER.load();
                Config.menuAlert = Boolean.parseBoolean(oldConfig.getString("menuAlert"));
                Config.chatAlert = Boolean.parseBoolean(oldConfig.getString("chatAlert"));
                Config.multiLoaderBool = Boolean.parseBoolean(oldConfig.getString("multiLoaderBool"));
                Config.multiLoader = Config.LoaderEnum.valueOf(oldConfig.getString("multiLoader"));
                Config.localVersion = oldConfig.getString("localVersion");
                Config.modpackId = oldConfig.getString("versionAPI");
                Config.multiVersion = Boolean.parseBoolean(oldConfig.getString("multiVersion"));
                Config.useModpackName = Boolean.parseBoolean(oldConfig.getString("useModpackName"));
                Config.modpackName = oldConfig.getString("modpackName");
                Config.useCustomMessage = Boolean.parseBoolean(oldConfig.getString("useCustomMessage"));
                Config.customMessage = oldConfig.getString("customMessage");
                Config.linkChangelog = Boolean.parseBoolean(oldConfig.getString("linkChangelog"));
                Config.ignoreColor = Config.colorEnum.valueOf(oldConfig.getString("ignoreColor"));
                Config.messageColor = Config.colorEnum.valueOf(oldConfig.getString("messageColor"));
                Config.changelogColor = Config.colorEnum.valueOf(oldConfig.getString("changelogColor"));
                Config.HANDLER.save();
                AIUTD.LOG.info("Config migrated, please double check it for accuracy!");
                Files.deleteIfExists(Path.of(YACLPlatform.getConfigDir() + "/aiutd.json5"));
                AIUTD.LOG.info("Old config has been deleted");
            }
        } catch (IOException e) {
            AIUTD.LOG.error("Failed to migrate config! Please do so manually!", e);
        }

        try {
            if (Files.exists(Path.of(YACLPlatform.getConfigDir() + "/aiutd-enduser.json5"))){
                AIUTD.LOG.info("Pre-2.5.0 end user config found. Migrating...!");

                String JSONContent = Files.readString(Path.of(YACLPlatform.getConfigDir() + "/aiutd-enduser.json5"));
                JSONObject oldUserConfig = JSON.parseObject(JSONContent, JSONReader.Feature.AllowUnQuotedFieldNames);

                EndUserConfig.USERCONFIG.load();
                EndUserConfig.shouldIgnore = Boolean.parseBoolean(oldUserConfig.getString("shouldIgnore"));
                Config.HANDLER.save();

                AIUTD.LOG.info("End user config migrated, please double check it for accuracy!");
                Files.deleteIfExists(Path.of(YACLPlatform.getConfigDir() + "/aiutd.json5"));
                AIUTD.LOG.info("Old end user config has been deleted");
            }
        } catch (IOException e) {
            AIUTD.LOG.error("Failed to migrate end user config! Please do so manually!", e);
        }
    }
}

FAQ

  • Is this faster than using the built-in Gson serializer?
    • In a word, yes. In a few more words, based on pure library performance, yes. In practice it's a bit harder to say and will likely depend on the size of the config in question. Will it make a massive difference in anything when used in a single mod? Not noticeably; if you get several using it, you may start to see something a bit more tangible.
  • Why make it if it wont improve performance much?
    • IDK, becuse I can? Free will and what not.
  • WAST has a better score on 3/4 of the tests, why not use it?†
    • Becuse I was already familiar with FastJSON and didn't need to learn anything new to make it. If I need (or want) to learn WAST one day maybe I'll make something for it then.

*Until I set up another maven
†As of June 28th, 2026

No gallery available for this project.

Version Minecraft Loader Download

FASTJSON2 Serializer for YACL 1.0.8 Fabric 26.1

1.0.8-fabric+26.1

26.1, 26.1.1, 26.1.2, 26.2, 26.3
fabric
Download

FASTJSON2 Serializer for YACL 1.0.8 Neoforge 26.1

1.0.8-neoforge+26.1

26.1, 26.1.1, 26.1.2, 26.2, 26.3
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.8 Fabric 1.21.5

1.0.8-fabric+1.21.5

1.21.10, 1.21.11, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9
fabric
Download

FASTJSON2 Serializer for YACL 1.0.8 Neoforge 1.21.5

1.0.8-neoforge+1.21.5

1.21.10, 1.21.11, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.8 Fabric 1.21.1

1.0.8-fabric+1.21.1

1.21.1, 1.21.2, 1.21.3, 1.21.4
fabric
Download

FASTJSON2 Serializer for YACL 1.0.8 Neoforge 1.21.1

1.0.8-neoforge+1.21.1

1.21.1, 1.21.2, 1.21.3, 1.21.4
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.8 Forge 1.20.1

1.0.8-forge+1.20.1

1.20.1
forge
Download

FASTJSON2 Serializer for YACL 1.0.8 Fabric 1.20.1

1.0.8-fabric+1.20.1

1.20.1
fabric
Download

FASTJSON2 Serializer for YACL 1.0.7 Fabric 26.1

1.0.7-fabric+26.1

26.1, 26.1.1, 26.1.2, 26.2
fabric
Download

FASTJSON2 Serializer for YACL 1.0.7 Neoforge 26.1

1.0.7-neoforge+26.1

26.1, 26.1.1, 26.1.2, 26.2
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.7 Fabric 1.21.5

1.0.7-fabric+1.21.5

1.21.10, 1.21.11, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9
fabric
Download

FASTJSON2 Serializer for YACL 1.0.7 Neoforge 1.21.5

1.0.7-neoforge+1.21.5

1.21.10, 1.21.11, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.7 Fabric 1.21.1

1.0.7-fabric+1.21.1

1.21.1, 1.21.2, 1.21.3, 1.21.4
fabric
Download

FASTJSON2 Serializer for YACL 1.0.7 Neoforge 1.21.1

1.0.7-neoforge+1.21.1

1.21.1, 1.21.2, 1.21.3, 1.21.4
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.7 Fabric 1.20.1

1.0.7-fabric+1.20.1

1.20.1
fabric
Download

FASTJSON2 Serializer for YACL 1.0.7 Forge 1.20.1

1.0.7-forge+1.20.1

1.20.1
forge
Download

FASTJSON2 Serializer for YACL 1.0.6 Fabric 26.1

1.0.6-fabric+26.1

26.1, 26.1.1, 26.1.2, 26.2
fabric
Download

FASTJSON2 Serializer for YACL 1.0.6 Neoforge 26.1

1.0.6-neoforge+26.1

26.1, 26.1.1, 26.1.2, 26.2
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.6 Fabric 1.21.5

1.0.6-fabric+1.21.5

1.21.10, 1.21.11, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9
fabric
Download

FASTJSON2 Serializer for YACL 1.0.6 Neoforge 1.21.5

1.0.6-neoforge+1.21.5

1.21.10, 1.21.11, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.6 Fabric 1.21.1

1.0.6-fabric+1.21.1

1.21.1, 1.21.2, 1.21.3, 1.21.4
fabric
Download

FASTJSON2 Serializer for YACL 1.0.6 Neoforge 1.21.1

1.0.6-neoforge+1.21.1

1.21.1, 1.21.2, 1.21.3, 1.21.4
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.6 Forge 1.20.1

1.0.6-forge+1.20.1

1.20.1
forge
Download

FASTJSON2 Serializer for YACL 1.0.6 Fabric 1.20.1

1.0.6-fabric+1.20.1

1.20.1
fabric
Download

FASTJSON2 Serializer for YACL 1.0.5 Neoforge 26.1

1.0.5-neoforge+26.1

26.1, 26.1.1, 26.1.2, 26.2
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.5 Fabric 26.1

1.0.5-fabric+26.1

26.1, 26.1.1, 26.1.2, 26.2
fabric
Download

FASTJSON2 Serializer for YACL 1.0.5 Neoforge 1.21.5

1.0.5-neoforge+1.21.5

1.21.10, 1.21.11, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.5 Fabric 1.21.5

1.0.5-fabric+1.21.5

1.21.10, 1.21.11, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9
fabric
Download

FASTJSON2 Serializer for YACL 1.0.5 Fabric 1.21.1

1.0.5-fabric+1.21.1

1.21.1, 1.21.2, 1.21.3, 1.21.4
fabric
Download

FASTJSON2 Serializer for YACL 1.0.5 Neoforge 1.21.1

1.0.5-neoforge+1.21.1

1.21.1, 1.21.2, 1.21.3, 1.21.4
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.5 Fabric 1.20.1

1.0.5-fabric+1.20.1

1.20.1
fabric
Download

FASTJSON2 Serializer for YACL 1.0.5 Forge 1.20.1

1.0.5-forge+1.20.1

1.20.1
forge
Download

FASTJSON2 Serializer for YACL 1.0.4 Fabric 26.1

1.0.4-fabric+26.1

26.1, 26.1.1, 26.1.2, 26.2
fabric
Download

FASTJSON2 Serializer for YACL 1.0.4 Neoforge 26.1

1.0.4-neoforge+26.1

26.1, 26.1.1, 26.1.2, 26.2
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.4 Fabric 1.21.5

1.0.4-fabric+1.21.5

1.21.10, 1.21.11, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9
fabric
Download

FASTJSON2 Serializer for YACL 1.0.4 Neoforge 1.21.5

1.0.4-neoforge+1.21.5

1.21.10, 1.21.11, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.4 Fabric 1.21.1

1.0.4-fabric+1.21.1

1.21.1, 1.21.2, 1.21.3, 1.21.4
fabric
Download

FASTJSON2 Serializer for YACL 1.0.4 Neoforge 1.21.1

1.0.4-neoforge+1.21.1

1.21.1, 1.21.2, 1.21.3, 1.21.4
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.4 Fabric 1.20.1

1.0.4-fabric+1.20.1

1.20.1
fabric
Download

FASTJSON2 Serializer for YACL 1.0.4 Forge 1.20.1

1.0.4-forge+1.20.1

1.20.1
forge
Download

FASTJSON2 Serializer for YACL 1.0.3 Neoforge 1.21.1

1.0.3-neoforge+1.21.1

1.21.1, 1.21.2, 1.21.3, 1.21.4
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.3 Fabric 1.21.5

1.0.3-fabric+1.21.5

1.21.10, 1.21.11, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9
fabric
Download

FASTJSON2 Serializer for YACL 1.0.3 Fabric 1.20.1

1.0.3-fabric+1.20.1

1.20.1
fabric
Download

FASTJSON2 Serializer for YACL 1.0.3 Fabric 1.21.1

1.0.3-fabric+1.21.1

1.21.1, 1.21.2, 1.21.3, 1.21.4
fabric
Download

FASTJSON2 Serializer for YACL 1.0.3 Fabric 26.1

1.0.3-fabric+26.1

26.1, 26.1.1, 26.1.2, 26.2
fabric
Download

FASTJSON2 Serializer for YACL 1.0.3 Forge 1.20.1

1.0.3-forge+1.20.1

1.20.1
forge
Download

FASTJSON2 Serializer for YACL 1.0.3 Neoforge 1.21.5

1.0.3-neoforge+1.21.5

1.21.10, 1.21.11, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.3 Neoforge 26.1

1.0.3-neoforge+26.1

26.1, 26.1.1, 26.1.2, 26.2
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.2 for 26.1 Neoforge

1.0.2+26.1-neoforge

26.1, 26.1.1, 26.1.2, 26.2
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.2 for 26.1 Fabric

1.0.2+26.1-fabric

26.1, 26.1.1, 26.1.2, 26.2
fabric
Download

FASTJSON2 Serializer for YACL 1.0.2 for 1.21.5 Neoforge

1.0.2+1.21.5-neoforge

1.21.10, 1.21.11, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.2 for 1.21.5 Fabric

1.0.2+1.21.5-fabric

1.21.10, 1.21.11, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9
fabric
Download

FASTJSON2 Serializer for YACL 1.0.2 for 1.21.1 Neoforge

1.0.2+1.21.1-neoforge

1.21.1, 1.21.2, 1.21.3, 1.21.4
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.2 for 1.21.1 Fabric

1.0.2+1.21.1-fabric

1.21.1, 1.21.2, 1.21.3, 1.21.4
fabric
Download

FASTJSON2 Serializer for YACL 1.0.2 for 1.20.1 Fabric

1.0.2+1.20.1-fabric

1.20.1
fabric
Download

FASTJSON2 Serializer for YACL 1.0.1 for 26.1 Neoforge

1.0.1+26.1-neoforge

26.1, 26.1.1, 26.1.2, 26.2
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.1 for 26.1 Fabric

1.0.1+26.1-fabric

26.1, 26.1.1, 26.1.2, 26.2
fabric
Download

FASTJSON2 Serializer for YACL 1.0.1 for 1.21.5 Neoforge

1.0.1+1.21.5-neoforge

1.21.10, 1.21.11, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.1 for 1.21.5 Fabric

1.0.1+1.21.5-fabric

1.21.10, 1.21.11, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9
fabric
Download

FASTJSON2 Serializer for YACL 1.0.1 for 1.21.1 Neoforge

1.0.1+1.21.1-neoforge

1.21.1, 1.21.2, 1.21.3, 1.21.4
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.1 for 1.21.1 Fabric

1.0.1+1.21.1-fabric

1.21.1, 1.21.2, 1.21.3, 1.21.4
fabric, quilt
Download

FASTJSON2 Serializer for YACL 1.0.1 for 1.20.1 Fabric

1.0.1+1.20.1-fabric

1.20.1
fabric, quilt
Download

FASTJSON2 Serializer for YACL 1.0.0 for 26.1 Neoforge

1.0.0+26.1-neoforge

26.1, 26.1.1, 26.1.2, 26.2
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.0 for 26.1 Fabric

1.0.0+26.1-fabric

26.1, 26.1.1, 26.1.2, 26.2
fabric
Download

FASTJSON2 Serializer for YACL 1.0.0 for 1.21.5 Neoforge

1.0.0+1.21.5-neoforge

1.21.10, 1.21.11, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.0 for 1.21.5 Fabric

1.0.0+1.21.5-fabric

1.21.10, 1.21.11, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9
fabric
Download

FASTJSON2 Serializer for YACL 1.0.0 for 1.21.1 Neoforge

1.0.0+1.21.1-neoforge

1.21.1, 1.21.2, 1.21.3, 1.21.4
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.0 for 1.21.1 Fabric

1.0.0+1.21.1-fabric

1.21.1, 1.21.2, 1.21.3, 1.21.4
fabric, quilt
Download

FASTJSON2 Serializer for YACL 1.0.0 for 1.20.1 Fabric

1.0.0+1.20.1-fabric

1.20.1
fabric, quilt
Download

FASTJSON2 Serializer for YACL 1.0.0-beta.1 for 26.2 Neoforge

1.0.0-beta.1+26.2-neoforge

26.2
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.0-beta.1 for 26.2 Fabric

1.0.0-beta.1+26.2-fabric

26.2
fabric
Download

FASTJSON2 Serializer for YACL 1.0.0-beta.1 for 26.1 Neoforge

1.0.0-beta.1+26.1-neoforge

26.1, 26.1.1, 26.1.2
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.0-beta.1 for 26.1 Fabric

1.0.0-beta.1+26.1-fabric

26.1, 26.1.1, 26.1.2
fabric
Download

FASTJSON2 Serializer for YACL 1.0.0-beta.1 for 1.21.11 Neoforge

1.0.0-beta.1+1.21.11-neoforge

1.21.11
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.0-beta.1 for 1.21.11 Fabric

1.0.0-beta.1+1.21.11-fabric

1.21.11
fabric
Download

FASTJSON2 Serializer for YACL 1.0.0-beta.1 for 1.21.9 Neoforge

1.0.0-beta.1+1.21.9-neoforge

1.21.10, 1.21.9
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.0-beta.1 for 1.21.9 Fabric

1.0.0-beta.1+1.21.9-fabric

1.21.10, 1.21.9
fabric
Download

FASTJSON2 Serializer for YACL 1.0.0-beta.1 for 1.21.6 Neoforge

1.0.0-beta.1+1.21.6-neoforge

1.21.6, 1.21.7, 1.21.8
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.0-beta.1 for 1.21.6 Fabric

1.0.0-beta.1+1.21.6-fabric

1.21.6, 1.21.7, 1.21.8
fabric
Download

FASTJSON2 Serializer for YACL 1.0.0-beta.1 for 1.21.5 Neoforge

1.0.0-beta.1+1.21.5-neoforge

1.21.5
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.0-beta.1 for 1.21.5 Fabric

1.0.0-beta.1+1.21.5-fabric

1.21.5
fabric
Download

FASTJSON2 Serializer for YACL 1.0.0-beta.1 for 1.21.4 Neoforge

1.0.0-beta.1+1.21.4-neoforge

1.21.4
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.0-beta.1 for 1.21.4 Fabric

1.0.0-beta.1+1.21.4-fabric

1.21.4
fabric
Download

FASTJSON2 Serializer for YACL 1.0.0-beta.1 for 1.21.2 Neoforge

1.0.0-beta.1+1.21.2-neoforge

1.21.2, 1.21.3
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.0-beta.1 for 1.21.2 Fabric

1.0.0-beta.1+1.21.2-fabric

1.21.2, 1.21.3
fabric
Download

FASTJSON2 Serializer for YACL 1.0.0-beta.1 for 1.21.1 Neoforge

1.0.0-beta.1+1.21.1-neoforge

1.21.1
neoforge
Download

FASTJSON2 Serializer for YACL 1.0.0-beta.1 for 1.21.1 Fabric

1.0.0-beta.1+1.21.1-fabric

1.21.1
fabric, quilt
Download

FASTJSON2 Serializer for YACL 1.0.0-beta.1 for 1.20.1 Fabric

1.0.0-beta.1+1.20.1-fabric

1.20.1
fabric, quilt
Download