Add support for alias name in config node

src/main/java/org/mvplugins/multiverse/core/config/node/ConfigNode.java

@@ -8,6 +8,7 @@
 
 import io.vavr.control.Option;
 import io.vavr.control.Try;
+import org.apache.logging.log4j.util.Strings;
 import org.bukkit.command.CommandSender;
 import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
@@ -45,6 +46,7 @@
 
     protected final @Nullable String name;
     protected final @NotNull Class<T> type;
+    protected final @NotNull String[] aliases;
     protected @Nullable Supplier<T> defaultValue;
     protected @Nullable NodeSuggester suggester;
     protected @Nullable NodeStringParser<T> stringParser;
@@ -57,6 +59,7 @@
             @NotNull String[] comments,
             @Nullable String name,
             @NotNull Class<T> type,
+            @NotNull String[] aliases,
             @Nullable Supplier<T> defaultValue,
             @Nullable NodeSuggester suggester,
             @Nullable NodeStringParser<T> stringParser,
@@ -66,6 +69,7 @@
         super(path, comments);
         this.name = name;
         this.type = type;
+        this.aliases = aliases;
         this.defaultValue = defaultValue;
         this.suggester = (suggester != null)
                 ? suggester
@@ -96,6 +100,14 @@
         return type;
     }
 
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public @NotNull String[] getAliases() {
+        return aliases;
+    }
+
     /**
      * {@inheritDoc}
      */
@@ -178,6 +190,7 @@
 
         protected @Nullable String name;
         protected @NotNull final Class<T> type;
+        protected @NotNull String[] aliases = Strings.EMPTY_ARRAY;
         protected @Nullable Supplier<T> defaultValue;
         protected @Nullable NodeSuggester suggester;
         protected @Nullable NodeStringParser<T> stringParser;
@@ -257,6 +270,20 @@
             return name(null);
         }
 
+        /**
+         * Sets the aliases for this node. Aliases are alternative identifiers for referencing the node.
+         *
+         * @param aliases The aliases to set for this node.
+         * @return This builder.
+         *
+         * @since 5.1
+         */
+        @ApiStatus.AvailableSince("5.1")
+        public @NotNull B aliases(@NotNull String... aliases) {
+            this.aliases = aliases;
+            return self();
+        }
+
         /**
          * Sets the suggester for this node.
          *
@@ -332,7 +359,7 @@
         @Override
         public @NotNull ConfigNode<T> build() {
             return new ConfigNode<>(path, comments.toArray(new String[0]),
-                    name, type, defaultValue, suggester, stringParser, serializer, validator, onSetValue);
+                    name, type, aliases, defaultValue, suggester, stringParser, serializer, validator, onSetValue);
         }
     }
 }

src/main/java/org/mvplugins/multiverse/core/config/node/ListConfigNode.java

@@ -60,6 +60,7 @@ protected ListConfigNode(
             @NotNull String[] comments,
             @Nullable String name,
             @NotNull Class<List<I>> type,
+            @NotNull String[] aliases,
             @Nullable Supplier<List<I>> defaultValueSupplier,
             @Nullable NodeSuggester suggester,
             @Nullable NodeStringParser<List<I>> stringParser,
@@ -72,7 +73,7 @@ protected ListConfigNode(
             @Nullable NodeSerializer<I> itemSerializer,
             @Nullable Function<I, Try<Void>> itemValidator,
             @Nullable BiConsumer<I, I> onSetItemValue) {
-        super(path, comments, name, type, defaultValueSupplier, suggester, stringParser, serializer,
+        super(path, comments, name, type, aliases, defaultValueSupplier, suggester, stringParser, serializer,
                 validator, onSetValue);
         this.itemType = itemType;
         this.itemSuggester = itemSuggester != null
@@ -348,6 +349,7 @@ protected Builder(@NotNull String path, @NotNull Class<I> itemType) {
                     comments.toArray(new String[0]),
                     name,
                     type,
+                    aliases,
                     defaultValue,
                     suggester,
                     stringParser,

src/main/java/org/mvplugins/multiverse/core/config/node/NodeGroup.java

@@ -1,9 +1,11 @@
 package org.mvplugins.multiverse.core.config.node;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collection;
 import java.util.HashMap;
 import java.util.Iterator;
+import java.util.List;
 import java.util.Map;
 
 import io.github.townyadvanced.commentedconfiguration.setting.CommentedNode;
@@ -16,13 +18,15 @@
  */
 public class NodeGroup implements Collection<Node> {
     private final Collection<Node> nodes;
+    private final List<String> nodeNames;
     private final Map<String, Node> nodesMap;
 
     /**
      * Creates a new empty node group.
      */
     public NodeGroup() {
         this.nodes = new ArrayList<>();
+        this.nodeNames = new ArrayList<>();
         this.nodesMap = new HashMap<>();
     }
 
@@ -34,18 +38,27 @@ public NodeGroup() {
     public NodeGroup(@NotNull Collection<Node> nodes) {
         this.nodes = nodes;
         this.nodesMap = new HashMap<>(nodes.size());
+        this.nodeNames = new ArrayList<>(nodes.size());
         nodes.forEach(this::addNodeIndex);
     }
 
     private void addNodeIndex(@NotNull Node node) {
-        if (node instanceof ValueNode) {
-            ((ValueNode<?>) node).getName().peek(name -> nodesMap.put(name, node));
+        if (node instanceof ValueNode<?> valueNode) {
+            valueNode.getName().peek(name -> {
+                nodeNames.add(name);
+                nodesMap.put(name, node);
+                Arrays.stream(valueNode.getAliases()).forEach(alias -> nodesMap.put(alias, node));
+            });
         }
     }
 
     private void removeNodeIndex(@NotNull Node node) {
-        if (node instanceof ValueNode) {
-            ((ValueNode<?>) node).getName().peek(nodesMap::remove);
+        if (node instanceof ValueNode<?> valueNode) {
+            valueNode.getName().peek(name -> {
+                nodeNames.remove(name);
+                nodesMap.remove(name);
+                Arrays.stream(valueNode.getAliases()).forEach(alias -> nodesMap.remove(alias, node));
+            });
         }
     }
 
@@ -55,7 +68,7 @@ private void removeNodeIndex(@NotNull Node node) {
      * @return The names of all nodes in this group.
      */
     public @NotNull Collection<String> getNames() {
-        return nodesMap.keySet();
+        return nodeNames;
     }
 
     /**

src/main/java/org/mvplugins/multiverse/core/config/node/ValueNode.java

@@ -4,6 +4,7 @@
 
 import io.vavr.control.Option;
 import io.vavr.control.Try;
+import org.apache.logging.log4j.util.Strings;
 import org.bukkit.command.CommandSender;
 import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
@@ -14,7 +15,7 @@
 public interface ValueNode<T> extends Node {
 
     /**
-     * Gets the name of this node. Used for identifying the node from user input.
+     * Gets the name of this node. Used for identifying the node from user input. This must be unique within a node group.
      *
      * @return An {@link Option} containing the name of this node, or {@link Option.None} if the node has no name.
      */
@@ -27,6 +28,19 @@
      */
     @NotNull Class<T> getType();
 
+    /**
+     * Gets the aliases of this node. Serves as shorter or legacy alternatives the {@link #getName()} and must be
+     * unique within a node group.
+     *
+     * @return The aliases of this node.
+     *
+     * @since 5.1
+     */
+    @ApiStatus.AvailableSince("5.1")
+    default @NotNull String[] getAliases() {
+        return Strings.EMPTY_ARRAY;
+    }
+
     /**
      * Gets the default value with type {@link T} of the node.
      *