CustomItemTag is now an abstract class

eco-api/src/main/java/com/willfp/eco/core/items/tag/CustomItemTag.java

@@ -1,60 +1,24 @@
 package com.willfp.eco.core.items.tag;
 
-import org.bukkit.Material;
 import org.bukkit.NamespacedKey;
-import org.bukkit.inventory.ItemStack;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.function.Predicate;
-import java.util.function.Supplier;
-
 /**
  * A custom item tag.
  */
-public final class CustomItemTag implements ItemTag {
+public abstract class CustomItemTag implements ItemTag {
     /**
      * The key.
      */
     private final NamespacedKey key;
 
-    /**
-     * The test.
-     */
-    private final Predicate<@NotNull ItemStack> test;
-
-    /**
-     * The example item.
-     */
-    private final Supplier<@NotNull ItemStack> exampleItem;
-
     /**
      * Create a new custom item tag.
      *
-     * @param key  The key.
-     * @param test The test.
-     */
-    public CustomItemTag(@NotNull final NamespacedKey key,
-                         @NotNull final Predicate<@NotNull ItemStack> test) {
-        this(
-                key,
-                test,
-                () -> new ItemStack(Material.STONE)
-        );
-    }
-
-    /**
-     * Create a new custom item tag with an example item.
-     *
      * @param key         The key.
-     * @param test        The test.
-     * @param exampleItem The example item.
      */
-    public CustomItemTag(@NotNull final NamespacedKey key,
-                         @NotNull final Predicate<@NotNull ItemStack> test,
-                         @NotNull final Supplier<@NotNull ItemStack> exampleItem) {
+    public CustomItemTag(@NotNull final NamespacedKey key) {
         this.key = key;
-        this.test = test;
-        this.exampleItem = exampleItem;
     }
 
     @Override
@@ -62,15 +26,4 @@ public final class CustomItemTag implements ItemTag {
     public String getIdentifier() {
         return key.toString();
     }
-
-    @Override
-    public boolean matches(@NotNull final ItemStack itemStack) {
-        return test.test(itemStack);
-    }
-
-    @Override
-    @NotNull
-    public ItemStack getExampleItem() {
-        return exampleItem.get();
-    }
 }

eco-api/src/main/java/com/willfp/eco/core/items/tag/ItemTag.java

@@ -8,7 +8,7 @@ import org.jetbrains.annotations.Nullable;
 /**
  * A group of items that share a common trait.
  */
-public sealed interface ItemTag permits CustomItemTag, VanillaItemTag {
+public interface ItemTag {
     /**
      * Get the identifier of the tag.
      *