use java8 to build

build.gradle

@@ -9,7 +9,7 @@ plugins {
     id 'java'
 }
 
-group 'net.william278'
+group 'org.inksnow.husk'
 version "$ext.library_version${versionMetadata()}"
 description "$ext.library_description"
 defaultTasks 'licenseFormat', 'build'
@@ -21,30 +21,12 @@ ext {
 
 publishing {
     repositories {
-        if (System.getenv("RELEASES_MAVEN_USERNAME") != null) {
         maven {
-                name = "william278-releases"
-                url = "https://repo.william278.net/releases"
+            name = 'husk-release'
+            url = findProperty("repository.huskrelease.url")
             credentials {
-                    username = System.getenv("RELEASES_MAVEN_USERNAME")
-                    password = System.getenv("RELEASES_MAVEN_PASSWORD")
-                }
-                authentication {
-                    basic(BasicAuthentication)
-                }
-            }
-        }
-        if (System.getenv("SNAPSHOTS_MAVEN_USERNAME") != null) {
-            maven {
-                name = "william278-snapshots"
-                url = "https://repo.william278.net/snapshots"
-                credentials {
-                    username = System.getenv("SNAPSHOTS_MAVEN_USERNAME")
-                    password = System.getenv("SNAPSHOTS_MAVEN_PASSWORD")
-                }
-                authentication {
-                    basic(BasicAuthentication)
-                }
+                username = findProperty("repository.huskrelease.username")
+                password = findProperty("repository.huskrelease.password")
             }
         }
     }
@@ -56,7 +38,7 @@ allprojects {
     apply plugin: 'java'
 
     compileJava.options.encoding = 'UTF-8'
-    compileJava.options.release.set 17
+    compileJava.options.release.set 8
     javadoc.options.encoding = 'UTF-8'
     javadoc.options.addStringOption('Xdoclint:none', '-quiet')
 
@@ -134,7 +116,7 @@ subprojects {
         if (['common'].contains(project.name)) {
             publications {
                 mavenJavaCommon(MavenPublication) {
-                    groupId = 'net.william278.uniform'
+                    groupId = 'org.inksnow.husk.uniform'
                     artifactId = 'uniform-common'
                     version = "$rootProject.version"
                     artifact shadowJar
@@ -147,7 +129,7 @@ subprojects {
         if (['paper'].contains(project.name)) {
             publications {
                 mavenJavaPaper(MavenPublication) {
-                    groupId = 'net.william278.uniform'
+                    groupId = 'org.inksnow.husk.uniform'
                     artifactId = 'uniform-paper'
                     version = "$rootProject.version"
                     artifact shadowJar
@@ -160,7 +142,7 @@ subprojects {
         if (['bukkit'].contains(project.name)) {
             publications {
                 mavenJavaBukkit(MavenPublication) {
-                    groupId = 'net.william278.uniform'
+                    groupId = 'org.inksnow.husk.uniform'
                     artifactId = 'uniform-bukkit'
                     version = "$rootProject.version"
                     artifact shadowJar
@@ -173,7 +155,7 @@ subprojects {
         if (['velocity'].contains(project.name)) {
             publications {
                 mavenJavaVelocity(MavenPublication) {
-                    groupId = 'net.william278.uniform'
+                    groupId = 'org.inksnow.husk.uniform'
                     artifactId = 'uniform-velocity'
                     version = "$rootProject.version"
                     artifact shadowJar
@@ -186,7 +168,7 @@ subprojects {
         if (['fabric-1.20.1'].contains(project.name)) {
             publications {
                 mavenJavaFabric1_20_1(MavenPublication) {
-                    groupId = 'net.william278.uniform'
+                    groupId = 'org.inksnow.husk.uniform'
                     artifactId = 'uniform-fabric'
                     version = "${rootProject.version}+1.20.1"
                     artifact remapJar
@@ -199,7 +181,7 @@ subprojects {
         if (['fabric-1.21'].contains(project.name)) {
             publications {
                 mavenJavaFabric1_21(MavenPublication) {
-                    groupId = 'net.william278.uniform'
+                    groupId = 'org.inksnow.husk.uniform'
                     artifactId = 'uniform-fabric'
                     version = "${rootProject.version}+1.21"
                     artifact remapJar
@@ -212,7 +194,7 @@ subprojects {
         if (['sponge-11'].contains(project.name)) {
             publications {
                 mavenSponge11(MavenPublication) {
-                    groupId = 'net.william278.uniform'
+                    groupId = 'org.inksnow.husk.uniform'
                     artifactId = 'uniform-sponge'
                     version = "${rootProject.version}+11"
                     artifact shadowJar

bukkit/build.gradle

@@ -6,7 +6,7 @@ plugins {
 dependencies {
     api project(path: ':common')
 
-    implementation 'net.kyori:adventure-platform-bukkit:4.3.4'
+    implementation 'net.kyori:adventure-platform-bukkit:4.3.3'
     implementation 'space.arim.morepaperlib:morepaperlib:0.4.4'
 
     compileOnlyApi 'org.spigotmc:spigot-api:1.17.1-R0.1-SNAPSHOT'

bukkit/src/main/java/net/william278/uniform/bukkit/BukkitCommand.java

@@ -32,6 +32,7 @@ import net.william278.uniform.BaseCommand;
 import net.william278.uniform.Command;
 import net.william278.uniform.Permission;
 import net.william278.uniform.Uniform;
+import net.william278.uniform.util.StringUtil;
 import org.bukkit.Bukkit;
 import org.bukkit.command.CommandException;
 import org.bukkit.command.CommandSender;
@@ -82,14 +83,17 @@ public class BukkitCommand extends BaseCommand<CommandSender> {
             this.setAliases(command.getAliases());
             this.setUsage(getUsageText());
             if (permission != null) {
-                this.setPermission(permission.node());
+                this.setPermission(permission.getNode());
             }
         }
 
         @NotNull
         private String getUsageText() {
-            return dispatcher.getSmartUsage(dispatcher.getRoot(), Bukkit.getConsoleSender()).values().stream()
-                    .map("/%s"::formatted).collect(Collectors.joining("\n"));
+            return dispatcher.getSmartUsage(dispatcher.getRoot(), Bukkit.getConsoleSender())
+                .values()
+                .stream()
+                .map("/"::concat)
+                .collect(Collectors.joining("\n"));
         }
 
         @SuppressWarnings("deprecation")
@@ -121,13 +125,15 @@ public class BukkitCommand extends BaseCommand<CommandSender> {
                     dispatcher.parse(passed, sender),
                     passed.length() // Spigot API limitation - we can only TAB complete the full text length :(
                 )
-                .thenApply(suggestions -> suggestions.getList().stream().map(Suggestion::getText).toList())
+                .thenApply(suggestions -> suggestions.getList().stream()
+                    .map(Suggestion::getText)
+                    .collect(Collectors.toList()))
                 .join();
         }
 
         @Override
         public boolean testPermissionSilent(@NotNull CommandSender target) {
-            if (permission == null || permission.node().isBlank()) {
+            if (permission == null || StringUtil.isBlank(permission.getNode())) {
                 return true;
             }
             return new BukkitCommandUser(target).checkPermission(permission);
@@ -140,7 +146,10 @@ public class BukkitCommand extends BaseCommand<CommandSender> {
 
         @NotNull
         private String getInput(@NotNull String[] args) {
-            return args.length == 0 ? getName() : "%s %s".formatted(getName(), String.join(" ", args));
+            if (args.length == 0) {
+                return getName();
+            }
+            return getName() + " " + String.join(" ", args);
         }
     }
 

bukkit/src/main/java/net/william278/uniform/bukkit/BukkitCommandUser.java

@@ -21,6 +21,7 @@
 
 package net.william278.uniform.bukkit;
 
+import lombok.Value;
 import net.kyori.adventure.audience.Audience;
 import net.william278.uniform.CommandUser;
 import net.william278.uniform.Permission;
@@ -32,7 +33,10 @@ import org.jetbrains.annotations.Nullable;
 
 import java.util.UUID;
 
-public record BukkitCommandUser(@NotNull CommandSender sender) implements CommandUser {
+@Value
+public class BukkitCommandUser implements CommandUser {
+
+    @NotNull CommandSender sender;
 
     @Override
     @NotNull
@@ -48,15 +52,15 @@ public record BukkitCommandUser(@NotNull CommandSender sender) implements Comman
     @Override
     @Nullable
     public UUID getUuid() {
-        return sender instanceof Player player ? player.getUniqueId() : null;
+        return sender instanceof Player ? ((Player) sender).getUniqueId() : null;
     }
 
     @Override
     public boolean checkPermission(@NotNull Permission permission) {
-        if (sender.isPermissionSet(permission.node())) {
-            return sender.hasPermission(permission.node());
+        if (sender.isPermissionSet(permission.getNode())) {
+            return sender.hasPermission(permission.getNode());
         }
-        return permission.defaultValue().check(
+        return permission.getDefaultValue().check(
             sender.isOp() || sender instanceof ConsoleCommandSender
         );
     }

bukkit/src/main/java/net/william278/uniform/bukkit/BukkitUniform.java

@@ -37,6 +37,7 @@ import space.arim.morepaperlib.commands.CommandRegistration;
 import java.util.Arrays;
 import java.util.Locale;
 import java.util.function.Function;
+import java.util.stream.Collectors;
 
 /**
  * A class for registering commands with the Bukkit server's CommandMap
@@ -91,7 +92,8 @@ public final class BukkitUniform implements Uniform {
         registrar.getServerCommandMap().registerAll(
             PLUGIN.getName().toLowerCase(Locale.ENGLISH).replaceAll("[^a-z0-9_]", ""),
             Arrays.stream(commands).map(c -> (BukkitCommand) c)
-                .map(c -> (org.bukkit.command.Command) c.getImpl(this)).toList()
+                .map(c -> (org.bukkit.command.Command) c.getImpl(this))
+                .collect(Collectors.toList())
         );
     }
 

common/build.gradle

@@ -6,6 +6,7 @@ plugins {
 dependencies {
     compileOnlyApi 'com.mojang:brigadier:1.1.8'
     compileOnlyApi 'net.kyori:adventure-api:4.17.0'
+    compileOnlyApi 'com.google.guava:guava:21.0'
 
     compileOnly 'org.jetbrains:annotations:24.1.0'
     compileOnly 'org.projectlombok:lombok:1.18.32'

common/src/main/java/net/william278/uniform/BaseCommand.java

@@ -21,6 +21,7 @@
 
 package net.william278.uniform;
 
+import com.google.common.collect.ImmutableList;
 import com.mojang.brigadier.arguments.*;
 import com.mojang.brigadier.builder.LiteralArgumentBuilder;
 import com.mojang.brigadier.suggestion.SuggestionProvider;
@@ -114,7 +115,7 @@ public abstract class BaseCommand<S> {
     @SafeVarargs
     public final void addConditionalSyntax(@Nullable Predicate<S> condition, @NotNull CommandExecutor<S> executor,
                                            @NotNull CommandElement<S>... elements) {
-        var syntax = new CommandSyntax<>(condition, executor, List.of(elements));
+        CommandSyntax<S> syntax = new CommandSyntax<>(condition, executor, ImmutableList.copyOf(elements));
         this.syntaxes.add(syntax);
     }
 

common/src/main/java/net/william278/uniform/Command.java

@@ -21,10 +21,13 @@
 
 package net.william278.uniform;
 
+import com.google.common.collect.ImmutableList;
 import lombok.AccessLevel;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
+import lombok.RequiredArgsConstructor;
 import lombok.Setter;
+import lombok.Value;
 import net.william278.uniform.annotations.Argument;
 import net.william278.uniform.annotations.CommandDescription;
 import net.william278.uniform.annotations.CommandNode;
@@ -39,6 +42,7 @@ import java.lang.reflect.Method;
 import java.lang.reflect.Parameter;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.List;
 import java.util.Optional;
 import java.util.function.Predicate;
@@ -51,7 +55,7 @@ import static net.william278.uniform.CommandExecutor.methodToExecutor;
 public abstract class Command implements CommandProvider {
 
     private final String name;
-    private List<String> aliases = List.of();
+    private List<String> aliases = Collections.emptyList();
     private String description = "";
     @Getter(AccessLevel.NONE)
     private @Nullable Permission permission = null;
@@ -70,7 +74,7 @@ public abstract class Command implements CommandProvider {
             throw new IllegalArgumentException("@CommandNode annotation is required on annotated command/sub-commands");
         }
         this.name = node.value();
-        this.aliases = List.of(node.aliases());
+        this.aliases = ImmutableList.copyOf(node.aliases());
         this.description = node.description();
         this.scope = node.scope();
         Permission.annotated(node.permission()).ifPresent(this::setPermission);
@@ -87,11 +91,16 @@ public abstract class Command implements CommandProvider {
         }
 
         public boolean contains(@NotNull CommandUser user) {
-            return switch (this) {
-                case IN_GAME -> !user.isConsole();
-                case CONSOLE -> user.isConsole();
-                case ALL -> true;
-            };
+            switch (this) {
+                case IN_GAME:
+                    return !user.isConsole();
+                case CONSOLE:
+                    return user.isConsole();
+                case ALL:
+                    return true;
+                default:
+                    throw new IllegalArgumentException("Unknown execution scope: " + this);
+            }
         }
     }
 
@@ -194,8 +203,15 @@ public abstract class Command implements CommandProvider {
         }
     }
 
-    public record SubCommand(@NotNull String name, @NotNull List<String> aliases, @Nullable Permission permission,
-                             @NotNull ExecutionScope scope, @NotNull CommandProvider provider) {
+    @Value
+    @RequiredArgsConstructor
+    public static class SubCommand {
+        @NotNull String name;
+        @NotNull List<String> aliases;
+        @Nullable Permission permission;
+        @NotNull ExecutionScope scope;
+        @NotNull CommandProvider provider;
+
         public SubCommand(@NotNull String name, @NotNull List<String> aliases, @Nullable Permission permission,
                           @NotNull CommandProvider provider) {
             this(name, aliases, permission, ExecutionScope.ALL, provider);
@@ -206,11 +222,11 @@ public abstract class Command implements CommandProvider {
         }
 
         public SubCommand(@NotNull String name, @Nullable Permission permission, @NotNull CommandProvider provider) {
-            this(name, List.of(), permission, ExecutionScope.ALL, provider);
+            this(name, Collections.emptyList(), permission, ExecutionScope.ALL, provider);
         }
 
         public SubCommand(@NotNull String name, @NotNull CommandProvider provider) {
-            this(name, List.of(), null, ExecutionScope.ALL, provider);
+            this(name, Collections.emptyList(), null, ExecutionScope.ALL, provider);
         }
 
 

common/src/main/java/net/william278/uniform/CommandExecutor.java

@@ -39,7 +39,7 @@ public interface CommandExecutor<S> {
                                                    @NotNull BaseCommand<?> cmd) {
         return (context) -> {
             try {
-                method.invoke(instance, injectParams(method, context, cmd));
+                method.invoke(instance, private$injectParams(method, context, cmd));
             } catch (IllegalAccessException | InvocationTargetException e) {
                 throw new IllegalStateException("Failed to invoke command executor from annotated method", e);
             }
@@ -47,7 +47,7 @@ public interface CommandExecutor<S> {
     }
 
     @Nullable
-    private static Object @NotNull [] injectParams(@NotNull Method method, @NotNull CommandContext<?> context,
+    static Object @NotNull [] private$injectParams(@NotNull Method method, @NotNull CommandContext<?> context,
                                                            @NotNull BaseCommand<?> cmd) {
         final Object[] params = new Object[method.getParameterCount()];
         for (int i = 0; i < method.getParameterCount(); i++) {

common/src/main/java/net/william278/uniform/CommandSyntax.java

@@ -21,6 +21,7 @@
 
 package net.william278.uniform;
 
+import lombok.Value;
 import net.william278.uniform.element.CommandElement;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -28,7 +29,9 @@ import org.jetbrains.annotations.Nullable;
 import java.util.List;
 import java.util.function.Predicate;
 
-public record CommandSyntax<S>(@Nullable Predicate<S> condition, @NotNull CommandExecutor<S> executor,
-                               @NotNull List<CommandElement<S>> elements) {
-
+@Value
+public class CommandSyntax<S> {
+  @Nullable Predicate<S> condition;
+  @NotNull CommandExecutor<S> executor;
+  @NotNull List<CommandElement<S>> elements;
 }

common/src/main/java/net/william278/uniform/ConversionNode.java

@@ -21,6 +21,9 @@
 
 package net.william278.uniform;
 
+import com.google.common.collect.ImmutableList;
+import lombok.RequiredArgsConstructor;
+import lombok.Value;
 import net.william278.uniform.element.CommandElement;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -31,8 +34,13 @@ import java.util.Map;
 
 import static net.william278.uniform.Graph.commandToElement;
 
-record ConversionNode<S>(@NotNull CommandElement<S> element, @Nullable Execution<S> execution,
-                         @NotNull Map<CommandElement<S>, ConversionNode<S>> nextMap) {
+@Value
+@RequiredArgsConstructor
+public class ConversionNode<S> {
+
+    @NotNull CommandElement<S> element;
+    @Nullable Execution<S> execution;
+    @NotNull Map<CommandElement<S>, ConversionNode<S>> nextMap;
 
     static <S> @NotNull ConversionNode<S> fromCommand(@NotNull BaseCommand<S> command) {
         ConversionNode<S> root = new ConversionNode<>(commandToElement(command), Execution.fromCommand(command));
@@ -40,8 +48,8 @@ record ConversionNode<S>(@NotNull CommandElement<S> element, @Nullable Execution
         for (CommandSyntax<S> syntax : command.getSyntaxes()) {
             ConversionNode<S> syntaxNode = root;
 
-            for (CommandElement<S> element : syntax.elements()) {
-                boolean last = element == syntax.elements().get(syntax.elements().size() - 1);
+            for (CommandElement<S> element : syntax.getElements()) {
+                boolean last = element == syntax.getElements().get(syntax.getElements().size() - 1);
                 syntaxNode = syntaxNode.nextMap.computeIfAbsent(element, e -> {
                     Execution<S> execution = last ? Execution.fromSyntax(syntax) : null;
                     return new ConversionNode<>(e, execution);
@@ -69,7 +77,7 @@ record ConversionNode<S>(@NotNull CommandElement<S> element, @Nullable Execution
             nodes[i++] = entry.toNode();
         }
 
-        return new Node<>(this.element, this.execution, List.of(nodes));
+        return new Node<>(this.element, this.execution, ImmutableList.copyOf(nodes));
     }
 
 }

common/src/main/java/net/william278/uniform/Execution.java

@@ -22,6 +22,7 @@
 package net.william278.uniform;
 
 import com.mojang.brigadier.builder.ArgumentBuilder;
+import lombok.Value;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -29,11 +30,16 @@ import java.util.concurrent.Executor;
 import java.util.concurrent.Executors;
 import java.util.function.Predicate;
 
-record Execution<S>(@NotNull Predicate<S> predicate, @Nullable CommandExecutor<S> defaultExecutor,
-                    @Nullable CommandExecutor<S> executor, @Nullable Predicate<S> condition) implements Predicate<S> {
+@Value
+public class Execution<S> implements Predicate<S> {
 
     private static final Executor CACHED_EXECUTOR = Executors.newCachedThreadPool();
 
+    @NotNull Predicate<S> predicate;
+    @Nullable CommandExecutor<S> defaultExecutor;
+    @Nullable CommandExecutor<S> executor;
+    @Nullable Predicate<S> condition;
+
     @NotNull
     static <S> Execution<S> fromCommand(@NotNull BaseCommand<S> command) {
         CommandExecutor<S> defaultExecutor = command.getDefaultExecutor();
@@ -42,9 +48,9 @@ record Execution<S>(@NotNull Predicate<S> predicate, @Nullable CommandExecutor<S
         CommandExecutor<S> executor = defaultExecutor;
         Predicate<S> condition = defaultCondition;
         for (CommandSyntax<S> syntax : command.getSyntaxes()) {
-            if (!syntax.elements().isEmpty()) continue;
-            executor = syntax.executor();
-            condition = syntax.condition();
+            if (!syntax.getElements().isEmpty()) continue;
+            executor = syntax.getExecutor();
+            condition = syntax.getCondition();
             break;
         }
 
@@ -53,8 +59,8 @@ record Execution<S>(@NotNull Predicate<S> predicate, @Nullable CommandExecutor<S
 
     @NotNull
     static <S> Execution<S> fromSyntax(@NotNull CommandSyntax<S> syntax) {
-        CommandExecutor<S> executor = syntax.executor();
-        Predicate<S> condition = syntax.condition();
+        CommandExecutor<S> executor = syntax.getExecutor();
+        Predicate<S> condition = syntax.getCondition();
         return new Execution<>(source -> condition == null || condition.test(source), null, executor, condition);
     }
 

common/src/main/java/net/william278/uniform/Graph.java

@@ -24,11 +24,14 @@ package net.william278.uniform;
 import com.mojang.brigadier.builder.LiteralArgumentBuilder;
 import com.mojang.brigadier.tree.CommandNode;
 import com.mojang.brigadier.tree.LiteralCommandNode;
+import lombok.Value;
 import net.william278.uniform.element.CommandElement;
 import net.william278.uniform.element.LiteralElement;
 import org.jetbrains.annotations.NotNull;
 
-record Graph<S>(@NotNull Node<S> root) {
+@Value
+public class Graph<S> {
+    @NotNull Node<S> root;
 
     static <S> @NotNull Graph<S> create(@NotNull BaseCommand<S> command) {
         return new Graph<>(Node.command(command));
@@ -41,10 +44,10 @@ record Graph<S>(@NotNull Node<S> root) {
     @NotNull
     LiteralCommandNode<S> build() {
         CommandNode<S> node = this.root.build();
-        if (!(node instanceof LiteralCommandNode<S> literalNode)) {
+        if (!(node instanceof LiteralCommandNode)) {
             throw new IllegalStateException("Root node is somehow not a literal node. This should be impossible.");
         }
-        return literalNode;
+        return (LiteralCommandNode<S>) node;
     }
 
     @NotNull
@@ -52,7 +55,7 @@ record Graph<S>(@NotNull Node<S> root) {
         final LiteralArgumentBuilder<S> builder = LiteralArgumentBuilder.literal(name);
         final CommandNode<S> command = this.root.build();
         builder.executes(command.getCommand());
-        this.root.children().forEach(child -> builder.then(child.build()));
+        this.root.getChildren().forEach(child -> builder.then(child.build()));
         return builder;
     }
 

common/src/main/java/net/william278/uniform/Node.java

@@ -23,13 +23,18 @@ package net.william278.uniform;
 
 import com.mojang.brigadier.builder.ArgumentBuilder;
 import com.mojang.brigadier.tree.CommandNode;
+import lombok.Value;
 import net.william278.uniform.element.CommandElement;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.List;
 
-record Node<S>(@NotNull CommandElement<S> element, @Nullable Execution<S> execution, @NotNull List<Node<S>> children) {
+@Value
+public class Node<S> {
+    @NotNull CommandElement<S> element;
+    @Nullable Execution<S> execution;
+    @NotNull List<Node<S>> children;
 
     static <S> @NotNull Node<S> command(@NotNull BaseCommand<S> command) {
         return ConversionNode.fromCommand(command).toNode();

common/src/main/java/net/william278/uniform/Permission.java

@@ -21,14 +21,22 @@
 
 package net.william278.uniform;
 
+import lombok.RequiredArgsConstructor;
+import lombok.Value;
 import net.william278.uniform.annotations.PermissionNode;
+import net.william278.uniform.util.StringUtil;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.Optional;
 import java.util.function.Predicate;
 
 @SuppressWarnings("unused")
-public record Permission(@NotNull String node, @NotNull Default defaultValue) {
+@Value
+@RequiredArgsConstructor
+public class Permission {
+
+    @NotNull String node;
+    @NotNull Default defaultValue;
 
     Permission(@NotNull String node) {
         this(node, Default.FALSE);
@@ -51,7 +59,7 @@ public record Permission(@NotNull String node, @NotNull Default defaultValue) {
 
     @NotNull
     static Optional<Permission> annotated(@NotNull PermissionNode annotation) {
-        if (annotation.value().isBlank()) {
+        if (StringUtil.isBlank(annotation.value())) {
             return Optional.empty();
         }
         return Optional.of(new Permission(annotation.value(), annotation.defaultValue()));
@@ -63,11 +71,12 @@ public record Permission(@NotNull String node, @NotNull Default defaultValue) {
         FALSE;
 
         public boolean check(boolean op) {
-            return switch (this) {
-                case IF_OP -> op;
-                case TRUE -> true;
-                case FALSE -> false;
-            };
+            switch (this) {
+                case IF_OP: return op;
+                case TRUE: return true;
+                case FALSE: return false;
+                default: throw new IllegalStateException("Unexpected value: " + this);
+            }
         }
     }
 

common/src/main/java/net/william278/uniform/Uniform.java

@@ -32,7 +32,7 @@ public interface Uniform {
 
     default void register(@NotNull Object... annotated) {
         register(Arrays.stream(annotated)
-                .map(c -> c instanceof Command cmd ? cmd : new Command.AnnotatedCommand(c))
+                .map(c -> c instanceof Command ? (Command) c : new Command.AnnotatedCommand(c))
                 .toArray(Command[]::new));
     }
 

common/src/main/java/net/william278/uniform/element/ArgumentElement.java

@@ -50,7 +50,7 @@ public final class ArgumentElement<S, T> implements CommandElement<S> {
     @Override
     @NotNull
     public ArgumentBuilder<S, ?> toBuilder() {
-        var builder = RequiredArgumentBuilder.<S, T>argument(this.name, this.type);
+        RequiredArgumentBuilder<S, T> builder = RequiredArgumentBuilder.<S, T>argument(this.name, this.type);
         if (this.suggestionProvider != null) builder.suggests(this.suggestionProvider);
         return builder;
     }

common/src/main/java/net/william278/uniform/element/LiteralElement.java

@@ -23,9 +23,12 @@ package net.william278.uniform.element;
 
 import com.mojang.brigadier.builder.ArgumentBuilder;
 import com.mojang.brigadier.builder.LiteralArgumentBuilder;
+import lombok.Value;
 import org.jetbrains.annotations.NotNull;
 
-public record LiteralElement<S>(@NotNull String name) implements CommandElement<S> {
+@Value
+public class LiteralElement<S> implements CommandElement<S> {
+    @NotNull String name;
 
     @Override
     @NotNull

common/src/main/java/net/william278/uniform/util/StringUtil.java

@@ -0,0 +1,40 @@
+/*
+ * This file is part of Uniform, licensed under the GNU General Public License v3.0.
+ *
+ *  Copyright (c) Tofaa2
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package net.william278.uniform.util;
+
+import lombok.experimental.UtilityClass;
+
+@UtilityClass
+public class StringUtil {
+  public static boolean isBlank(String $this) {
+    final int strLen = $this.length();
+    if (strLen == 0) {
+      return true;
+    }
+    for (int i = 0; i < strLen; i++) {
+      if (!Character.isWhitespace($this.charAt(i))) {
+        return false;
+      }
+    }
+    return true;
+  }
+}

example-plugin/src/main/java/net/william278/uniform/ExtendedCommand.java

@@ -21,6 +21,7 @@
 
 package net.william278.uniform;
 
+import com.google.common.collect.ImmutableList;
 import com.mojang.brigadier.exceptions.CommandSyntaxException;
 import net.kyori.adventure.text.Component;
 import net.william278.uniform.element.ArgumentElement;
@@ -38,7 +39,7 @@ public class ExtendedCommand extends Command {
     public ExtendedCommand() {
         super("example");
         setDescription("An example command for Uniform");
-        setAliases(List.of("helloworld"));
+        setAliases(ImmutableList.of("helloworld"));
         setPermission(Permission.defaultIfOp("uniform.example"));
     }
 
@@ -56,9 +57,21 @@ public class ExtendedCommand extends Command {
             final CommandUser user = sub.getUser(ctx.getSource());
             final IceCreamFlavor flavor = ctx.getArgument("flavor", IceCreamFlavor.class);
             switch (flavor) {
-                case VANILLA -> user.getAudience().sendMessage(Component.text("Vanilla ice cream is fine!"));
-                case CHOCOLATE -> user.getAudience().sendMessage(Component.text("Chocolate ice cream is kino!"));
-                case STRAWBERRY -> user.getAudience().sendMessage(Component.text("Strawberry ice cream is ok..."));
+                case VANILLA: {
+                    user.getAudience().sendMessage(Component.text("Vanilla ice cream is fine!"));
+                    break;
+                }
+                case CHOCOLATE: {
+                    user.getAudience().sendMessage(Component.text("Chocolate ice cream is kino!"));
+                    break;
+                }
+                case STRAWBERRY: {
+                    user.getAudience().sendMessage(Component.text("Strawberry ice cream is ok..."));
+                    break;
+                }
+                default: {
+                    // do nothing
+                }
             }
         }, exampleCustomArg()));
     }

paper/src/main/java/net/william278/uniform/paper/LegacyPaperCommand.java

@@ -27,6 +27,7 @@ import com.mojang.brigadier.suggestion.Suggestion;
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.format.NamedTextColor;
 import net.william278.uniform.*;
+import net.william278.uniform.util.StringUtil;
 import org.bukkit.Bukkit;
 import org.bukkit.command.CommandException;
 import org.bukkit.command.CommandSender;
@@ -87,14 +88,14 @@ public class LegacyPaperCommand extends BaseCommand<CommandSender> {
             this.setAliases(command.getAliases());
             this.setUsage(getUsageText());
             if (permission != null) {
-                this.setPermission(permission.node());
+                this.setPermission(permission.getNode());
             }
         }
 
         @NotNull
         private String getUsageText() {
             return dispatcher.getSmartUsage(dispatcher.getRoot(), Bukkit.getConsoleSender()).values().stream()
-                    .map("/%s"::formatted).collect(Collectors.joining("\n"));
+                    .map("/"::concat).collect(Collectors.joining("\n"));
         }
 
         @SuppressWarnings("deprecation")
@@ -126,13 +127,16 @@ public class LegacyPaperCommand extends BaseCommand<CommandSender> {
                             dispatcher.parse(passed, sender),
                             passed.length() // Spigot API limitation - we can only TAB complete the full text length :(
                     )
-                    .thenApply(suggestions -> suggestions.getList().stream().map(Suggestion::getText).toList())
+                    .thenApply(suggestions -> suggestions.getList()
+                        .stream()
+                        .map(Suggestion::getText)
+                        .collect(Collectors.toList()))
                     .join();
         }
 
         @Override
         public boolean testPermissionSilent(@NotNull CommandSender target) {
-            if (permission == null || permission.node().isBlank()) {
+            if (permission == null || StringUtil.isBlank(permission.getNode())) {
                 return true;
             }
             return new LegacyPaperCommandUser(target).checkPermission(permission);
@@ -140,7 +144,10 @@ public class LegacyPaperCommand extends BaseCommand<CommandSender> {
 
         @NotNull
         private String getInput(@NotNull String[] args) {
-            return args.length == 0 ? getName() : "%s %s".formatted(getName(), String.join(" ", args));
+            if (args.length == 0) {
+                return getName();
+            }
+            return getName() + " " + String.join(" ", args);
         }
     }
 

paper/src/main/java/net/william278/uniform/paper/LegacyPaperCommandUser.java

@@ -21,6 +21,7 @@
 
 package net.william278.uniform.paper;
 
+import lombok.Value;
 import net.kyori.adventure.audience.Audience;
 import net.william278.uniform.CommandUser;
 import net.william278.uniform.Permission;
@@ -32,7 +33,10 @@ import org.jetbrains.annotations.Nullable;
 
 import java.util.UUID;
 
-public record LegacyPaperCommandUser(@NotNull CommandSender sender) implements CommandUser {
+@Value
+public class LegacyPaperCommandUser implements CommandUser {
+
+    @NotNull CommandSender sender;
 
     @Override
     @NotNull
@@ -48,15 +52,15 @@ public record LegacyPaperCommandUser(@NotNull CommandSender sender) implements C
     @Override
     @Nullable
     public UUID getUuid() {
-        return sender instanceof Player player ? player.getUniqueId() : null;
+        return sender instanceof Player ? ((Player) sender).getUniqueId() : null;
     }
 
     @Override
     public boolean checkPermission(@NotNull Permission permission) {
-        if (sender.isPermissionSet(permission.node())) {
-            return sender.hasPermission(permission.node());
+        if (sender.isPermissionSet(permission.getNode())) {
+            return sender.hasPermission(permission.getNode());
         }
-        return permission.defaultValue().check(
+        return permission.getDefaultValue().check(
             sender.isOp() || sender instanceof ConsoleCommandSender
         );
     }

paper/src/main/java/net/william278/uniform/paper/PaperCommand.java

@@ -21,6 +21,7 @@
 
 package net.william278.uniform.paper;
 
+import com.google.common.collect.ImmutableList;
 import com.mojang.brigadier.exceptions.CommandSyntaxException;
 import io.papermc.paper.command.brigadier.CommandSourceStack;
 import io.papermc.paper.plugin.lifecycle.event.types.LifecycleEvents;
@@ -38,6 +39,7 @@ import java.util.Collection;
 import java.util.List;
 import java.util.Set;
 import java.util.function.Function;
+import java.util.stream.Collectors;
 
 @SuppressWarnings({"unused", "UnstableApiUsage"})
 public class PaperCommand extends BaseCommand<CommandSourceStack> {
@@ -92,11 +94,11 @@ public class PaperCommand extends BaseCommand<CommandSourceStack> {
             if (playerName.equals("@a")) {
                 return Bukkit.getOnlinePlayers();
             }
-            var player = Bukkit.getPlayer(playerName);
+            Player player = Bukkit.getPlayer(playerName);
             if (player == null) {
                 throw CommandSyntaxException.BUILT_IN_EXCEPTIONS.dispatcherUnknownArgument().createWithContext(reader);
             }
-            return List.of(player);
+            return ImmutableList.of(player);
         }, (context, builder) -> {
             builder.suggest("@a");
             for (Player player : Bukkit.getOnlinePlayers()) {
@@ -112,9 +114,9 @@ public class PaperCommand extends BaseCommand<CommandSourceStack> {
     public List<CommandSyntax<CommandSourceStack>> getSyntaxes() {
         return super.getSyntaxes().stream().map(
             syntax -> new CommandSyntax<>(
-                syntax.condition(),
-                syntax.executor(),
-                syntax.elements().stream()
+                syntax.getCondition(),
+                syntax.getExecutor(),
+                syntax.getElements().stream()
                     .filter(e -> e instanceof ArgumentElement)
                     .map(e -> (ArgumentElement<?, ?>) e)
                     .map(e -> e.custom() ? new ArgumentElement<>(
@@ -123,9 +125,9 @@ public class PaperCommand extends BaseCommand<CommandSourceStack> {
                         e.suggestionProvider()
                     ) : e)
                     .map(e -> (CommandElement<CommandSourceStack>) e)
-                    .toList()
+                    .collect(Collectors.toList())
             )
-        ).toList();
+        ).collect(Collectors.toList());
     }
 
     @Override

paper/src/main/java/net/william278/uniform/paper/PaperCommandUser.java

@@ -22,6 +22,7 @@
 package net.william278.uniform.paper;
 
 import io.papermc.paper.command.brigadier.CommandSourceStack;
+import lombok.Value;
 import net.kyori.adventure.audience.Audience;
 import net.william278.uniform.CommandUser;
 import net.william278.uniform.Permission;
@@ -32,8 +33,9 @@ import org.jetbrains.annotations.Nullable;
 import java.util.UUID;
 
 @SuppressWarnings("UnstableApiUsage")
-public record PaperCommandUser(@NotNull CommandSourceStack source) implements CommandUser {
-
+@Value
+public class PaperCommandUser implements CommandUser {
+    @NotNull CommandSourceStack source;
 
     @Override
     @NotNull
@@ -55,10 +57,10 @@ public record PaperCommandUser(@NotNull CommandSourceStack source) implements Co
 
     @Override
     public boolean checkPermission(@NotNull Permission permission) {
-        if (source.getSender().isPermissionSet(permission.node())) {
-            return source.getSender().hasPermission(permission.node());
+        if (source.getSender().isPermissionSet(permission.getNode())) {
+            return source.getSender().hasPermission(permission.getNode());
         }
-        return permission.defaultValue().check(
+        return permission.getDefaultValue().check(
             source.getSender().isOp() || source.getSender() instanceof ConsoleCommandSender
         );
     }

paper/src/main/java/net/william278/uniform/paper/PaperUniform.java

@@ -35,6 +35,7 @@ import java.util.Arrays;
 import java.util.Locale;
 import java.util.Set;
 import java.util.function.Function;
+import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 /**
@@ -108,7 +109,8 @@ public final class PaperUniform implements Uniform {
         // Register with the legacy API
         plugin.getServer().getCommandMap().registerAll(
                 plugin.getName().toLowerCase(Locale.ENGLISH).replaceAll("[^a-z0-9_]", ""),
-                s.map(c -> (LegacyPaperCommand) c).map(c -> (org.bukkit.command.Command) c.getImpl(this)).toList()
+                s.map(c -> (LegacyPaperCommand) c).map(c -> (org.bukkit.command.Command) c.getImpl(this))
+                    .collect(Collectors.toList())
         );
     }
 

settings.gradle

@@ -12,14 +12,14 @@ include(
         // Server Plugins
         'paper',
         'bukkit',
-        'sponge-11',
+        // 'sponge-11',
 
         // Proxy Plugins
         'velocity',
 
         // Fabric Server-Side Mods
-        'fabric-1.20.1',
-        'fabric-1.21',
+        // 'fabric-1.20.1',
+        // 'fabric-1.21',
 
         // Example plugin
         'example-plugin'

velocity/src/main/java/net/william278/uniform/velocity/VelocityCommandUser.java

@@ -24,6 +24,7 @@ package net.william278.uniform.velocity;
 import com.velocitypowered.api.command.CommandSource;
 import com.velocitypowered.api.permission.Tristate;
 import com.velocitypowered.api.proxy.Player;
+import lombok.Value;
 import net.kyori.adventure.audience.Audience;
 import net.william278.uniform.CommandUser;
 import net.william278.uniform.Permission;
@@ -32,7 +33,10 @@ import org.jetbrains.annotations.Nullable;
 
 import java.util.UUID;
 
-public record VelocityCommandUser(CommandSource source) implements CommandUser {
+@Value
+public class VelocityCommandUser implements CommandUser {
+
+    CommandSource source;
 
     @Override
     @NotNull
@@ -54,10 +58,10 @@ public record VelocityCommandUser(CommandSource source) implements CommandUser {
 
     @Override
     public boolean checkPermission(@NotNull Permission permission) {
-        if (source.getPermissionValue(permission.node()) != Tristate.UNDEFINED) {
-            return source.getPermissionValue(permission.node()) == Tristate.TRUE;
+        if (source.getPermissionValue(permission.getNode()) != Tristate.UNDEFINED) {
+            return source.getPermissionValue(permission.getNode()) == Tristate.TRUE;
         }
-        return permission.defaultValue().check(source.hasPermission(permission.node()));
+        return permission.getDefaultValue().check(source.hasPermission(permission.getNode()));
     }
 
 }