Work around older Gson versions without record support

bootstrap/spigot/build.gradle.kts

@@ -25,6 +25,8 @@ dependencies {
     compileOnly(libs.paper.mojangapi)
 
     compileOnlyApi(libs.viaversion)
+
+    implementation(libs.gson.record.factory) // For 1.16.5/1.17.1
 }
 
 platformRelocate("it.unimi.dsi.fastutil")
@@ -36,6 +38,7 @@ platformRelocate("me.lucko.commodore")
 platformRelocate("org.yaml") // Broken as of 1.20
 platformRelocate("org.spongepowered")
 platformRelocate("io.leangen.geantyref")
+platformRelocate("marcono1234.gson")
 
 // These dependencies are already present on the platform
 provided(libs.viaversion)

core/build.gradle.kts

@@ -20,6 +20,10 @@ dependencies {
     implementation(libs.configurate.yaml)
     api(libs.guava)
 
+    compileOnly(libs.gson.record.factory) {
+        isTransitive = false
+    }
+
     // Fastutil Maps
     implementation(libs.bundles.fastutil)
 
@@ -61,7 +65,7 @@ dependencies {
 
     // Test
     testImplementation(libs.junit)
-    testImplementation(libs.gson.runtime)
+    testImplementation(libs.gson.runtime) // Record support
 
     // Annotation Processors
     compileOnly(projects.ap)

core/src/main/java/org/geysermc/geyser/GeyserImpl.java

@@ -29,7 +29,6 @@ import com.fasterxml.jackson.core.JsonParser;
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.google.gson.Gson;
-import com.google.gson.GsonBuilder;
 import com.google.gson.reflect.TypeToken;
 import io.netty.channel.epoll.Epoll;
 import io.netty.util.NettyRuntime;
@@ -57,7 +56,11 @@ import org.geysermc.geyser.api.GeyserApi;
 import org.geysermc.geyser.api.command.CommandSource;
 import org.geysermc.geyser.api.event.EventBus;
 import org.geysermc.geyser.api.event.EventRegistrar;
-import org.geysermc.geyser.api.event.lifecycle.*;
+import org.geysermc.geyser.api.event.lifecycle.GeyserPostInitializeEvent;
+import org.geysermc.geyser.api.event.lifecycle.GeyserPostReloadEvent;
+import org.geysermc.geyser.api.event.lifecycle.GeyserPreInitializeEvent;
+import org.geysermc.geyser.api.event.lifecycle.GeyserPreReloadEvent;
+import org.geysermc.geyser.api.event.lifecycle.GeyserShutdownEvent;
 import org.geysermc.geyser.api.network.AuthType;
 import org.geysermc.geyser.api.network.BedrockListener;
 import org.geysermc.geyser.api.network.RemoteServer;
@@ -87,7 +90,14 @@ import org.geysermc.geyser.skin.SkinProvider;
 import org.geysermc.geyser.text.GeyserLocale;
 import org.geysermc.geyser.text.MinecraftLocale;
 import org.geysermc.geyser.translator.text.MessageTranslator;
-import org.geysermc.geyser.util.*;
+import org.geysermc.geyser.util.AssetUtils;
+import org.geysermc.geyser.util.CooldownUtils;
+import org.geysermc.geyser.util.DimensionUtils;
+import org.geysermc.geyser.util.JsonUtils;
+import org.geysermc.geyser.util.Metrics;
+import org.geysermc.geyser.util.NewsHandler;
+import org.geysermc.geyser.util.VersionCheckUtils;
+import org.geysermc.geyser.util.WebUtils;
 import org.geysermc.mcprotocollib.network.tcp.TcpSession;
 
 import java.io.File;
@@ -101,7 +111,14 @@ import java.net.UnknownHostException;
 import java.nio.file.Path;
 import java.security.Key;
 import java.text.DecimalFormat;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.Executors;
@@ -118,7 +135,7 @@ public class GeyserImpl implements GeyserApi {
             .enable(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES)
             .enable(JsonParser.Feature.ALLOW_SINGLE_QUOTES);
 
-    public static final Gson GSON = new GsonBuilder().setPrettyPrinting().create();
+    public static final Gson GSON = JsonUtils.createGson();
 
     public static final String NAME = "Geyser";
     public static final String GIT_VERSION = BuildData.GIT_VERSION;

core/src/main/java/org/geysermc/geyser/pack/GeyserResourcePackManifest.java

@@ -30,6 +30,7 @@ import com.google.gson.JsonDeserializationContext;
 import com.google.gson.JsonDeserializer;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonParseException;
+import com.google.gson.annotations.JsonAdapter;
 import com.google.gson.annotations.SerializedName;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.geysermc.geyser.api.pack.ResourcePackManifest;
@@ -46,6 +47,7 @@ public record GeyserResourcePackManifest(@SerializedName("format_version") int f
 
     public record Dependency(UUID uuid, Version version) implements ResourcePackManifest.Dependency { }
 
+    @JsonAdapter(value = Version.VersionDeserializer.class)
     public record Version(int major, int minor, int patch) implements ResourcePackManifest.Version {
 
         @Override

core/src/main/java/org/geysermc/geyser/registry/loader/ResourcePackLoader.java

@@ -25,8 +25,6 @@
 
 package org.geysermc.geyser.registry.loader;
 
-import com.google.gson.Gson;
-import com.google.gson.GsonBuilder;
 import org.geysermc.geyser.GeyserImpl;
 import org.geysermc.geyser.api.event.lifecycle.GeyserLoadResourcePacksEvent;
 import org.geysermc.geyser.api.pack.ResourcePack;
@@ -57,9 +55,6 @@ import java.util.zip.ZipFile;
  * Loads {@link ResourcePack}s within a {@link Path} directory, firing the {@link GeyserLoadResourcePacksEvent}.
  */
 public class ResourcePackLoader implements RegistryLoader<Path, Map<String, ResourcePack>> {
-    private static final Gson GSON = new GsonBuilder()
-        .registerTypeAdapter(GeyserResourcePackManifest.Version.class, new GeyserResourcePackManifest.Version.VersionDeserializer())
-        .create();
 
     static final PathMatcher PACK_MATCHER = FileSystems.getDefault().getPathMatcher("glob:**.{zip,mcpack}");
 
@@ -140,7 +135,7 @@ public class ResourcePackLoader implements RegistryLoader<Path, Map<String, Reso
                 }
                 if (name.contains("manifest.json")) {
                     try {
-                        GeyserResourcePackManifest manifest = FileUtils.loadJson(GSON, zip.getInputStream(x), GeyserResourcePackManifest.class);
+                        GeyserResourcePackManifest manifest = FileUtils.loadJson(zip.getInputStream(x), GeyserResourcePackManifest.class);
                         if (manifest.header().uuid() != null) {
                             manifestReference.set(manifest);
                         }

core/src/main/java/org/geysermc/geyser/util/FileUtils.java

@@ -30,11 +30,15 @@ import com.fasterxml.jackson.annotation.Nulls;
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
-import com.google.gson.Gson;
 import org.geysermc.geyser.GeyserBootstrap;
 import org.geysermc.geyser.GeyserImpl;
 
-import java.io.*;
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
 import java.lang.annotation.Annotation;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
@@ -65,12 +69,8 @@ public class FileUtils {
     }
 
     public static <T> T loadJson(InputStream src, Class<T> valueType) {
-        return loadJson(GeyserImpl.GSON, src, valueType);
-    }
-
-    public static <T> T loadJson(Gson gson, InputStream src, Class<T> valueType) {
         // Read specifically with UTF-8 to allow any non-UTF-encoded JSON to read
-        return gson.fromJson(new InputStreamReader(src, StandardCharsets.UTF_8), valueType);
+        return GeyserImpl.GSON.fromJson(new InputStreamReader(src, StandardCharsets.UTF_8), valueType);
     }
 
     /**

core/src/main/java/org/geysermc/geyser/util/JsonUtils.java

@@ -25,9 +25,13 @@
 
 package org.geysermc.geyser.util;
 
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonParser;
+import marcono1234.gson.recordadapter.RecordTypeAdapterFactory;
 import org.geysermc.geyser.GeyserImpl;
+import org.geysermc.geyser.pack.GeyserResourcePackManifest;
 
 import java.io.InputStream;
 import java.io.InputStreamReader;
@@ -48,6 +52,21 @@ public final class JsonUtils {
         return GeyserImpl.GSON.fromJson(new InputStreamReader(stream), type);
     }
 
+    public static Gson createGson() {
+        GsonBuilder builder = new GsonBuilder().setPrettyPrinting();
+        try {
+            new Gson().fromJson("{\"version\":[1,0,0],\"uuid\":\"eebb4ea8-a701-11eb-95ba-047d7bb283ba\"}", GeyserResourcePackManifest.Dependency.class);
+        } catch (Throwable e) {
+            // 1.16.5 and 1.17.1 (at minimum) have an outdated Gson version that doesn't support records.
+            // Remove this workaround when all platforms support Gson 2.10+
+            // (Explicitly allow missing component values - the dependencies module for resource packs, for example, can be missing)
+            builder.registerTypeAdapterFactory(RecordTypeAdapterFactory.builder().allowMissingComponentValues().create())
+                // Since this is a record, the above will take precedence unless we explicitly declare it.
+                .registerTypeAdapter(GeyserResourcePackManifest.Version.class, new GeyserResourcePackManifest.Version.VersionDeserializer());
+        }
+        return builder.create();
+    }
+
     private JsonUtils() {
     }
 }

gradle/libs.versions.toml

@@ -113,6 +113,7 @@ commodore = { group = "me.lucko", name = "commodore", version.ref = "commodore"
 guava = { group = "com.google.guava", name = "guava", version.ref = "guava" }
 gson = { group = "com.google.code.gson", name = "gson", version.ref = "gson" }
 gson-runtime = { group = "com.google.code.gson", name = "gson", version.ref = "gson-runtime" }
+gson-record-factory = { group = "com.github.Marcono1234", name = "gson-record-type-adapter-factory", version = "0.3.0" }
 junit = { group = "org.junit.jupiter", name = "junit-jupiter", version.ref = "junit" }
 mcauthlib = { group = "com.github.GeyserMC", name = "MCAuthLib", version.ref = "mcauthlib" }
 mcprotocollib = { group = "org.geysermc.mcprotocollib", name = "protocol", version.ref = "mcprotocollib" }