Fixed shading errors.

src/main/java/com/willfp/eco/util/recipes/lookup/EcoItemLookup.java → src/main/java/com/willfp/eco/common/recipes/lookup/EcoItemLookup.java

@@ -1,17 +1,13 @@
-package com.willfp.eco.util.recipes.lookup;
+package com.willfp.eco.common.recipes.lookup;
 
-import com.willfp.eco.util.recipes.parts.EmptyRecipePart;
-import com.willfp.eco.util.recipes.parts.RecipePart;
-import com.willfp.eco.util.recipes.parts.SimpleRecipePart;
+import com.willfp.eco.common.recipes.parts.EmptyRecipePart;
+import com.willfp.eco.common.recipes.parts.RecipePart;
+import com.willfp.eco.common.recipes.parts.SimpleRecipePart;
 import org.bukkit.Material;
-import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
 
 import java.util.HashMap;
-import java.util.HashSet;
 import java.util.Map;
-import java.util.Set;
 import java.util.function.Function;
 
 public class EcoItemLookup implements ItemLookup {

src/main/java/com/willfp/eco/util/recipes/lookup/ItemLookup.java → src/main/java/com/willfp/eco/common/recipes/lookup/ItemLookup.java

@@ -1,6 +1,6 @@
-package com.willfp.eco.util.recipes.lookup;
+package com.willfp.eco.common.recipes.lookup;
 
-import com.willfp.eco.util.recipes.parts.RecipePart;
+import com.willfp.eco.common.recipes.parts.RecipePart;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.function.Function;

src/main/java/com/willfp/eco/common/recipes/lookup/RecipePartUtils.java

@@ -0,0 +1,48 @@
+package com.willfp.eco.common.recipes.lookup;
+
+import com.willfp.eco.common.recipes.parts.RecipePart;
+import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import lombok.experimental.UtilityClass;
+import org.bukkit.Bukkit;
+import org.bukkit.plugin.ServicePriority;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.function.Function;
+
+@SuppressWarnings("unchecked")
+@UtilityClass
+public final class RecipePartUtils {
+    /**
+     * Item lookup instance.
+     */
+    private static final ItemLookup itemLookup;
+
+    /**
+     * Lookup recipe part from string.
+     *
+     * @param key The string to test.
+     * @return The generated recipe part, or null if invalid.
+     */
+    public RecipePart lookup(@NotNull final String key) {
+        return itemLookup.lookup(key);
+    }
+
+    /**
+     * Register a new lookup.
+     *
+     * @param key    The key of the lookup.
+     * @param lookup The lookup to register, where the output is the recipe part generated.
+     */
+    public void registerLookup(@NotNull final String key,
+                               @NotNull final Function<String, RecipePart> lookup) {
+        itemLookup.registerLookup(key, lookup);
+    }
+
+    static {
+        if (!Bukkit.getServicesManager().isProvidedFor(ItemLookup.class)) {
+            Bukkit.getServicesManager().register(ItemLookup.class, new EcoItemLookup(), AbstractEcoPlugin.getInstance(), ServicePriority.Normal);
+        }
+
+        itemLookup = Bukkit.getServicesManager().load(ItemLookup.class);
+    }
+}

src/main/java/com/willfp/eco/util/recipes/parts/ComplexRecipePart.java → src/main/java/com/willfp/eco/common/recipes/parts/ComplexRecipePart.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.recipes.parts;
+package com.willfp.eco.common.recipes.parts;
 
 import lombok.Getter;
 import org.bukkit.inventory.ItemStack;

src/main/java/com/willfp/eco/util/recipes/parts/EmptyRecipePart.java → src/main/java/com/willfp/eco/common/recipes/parts/EmptyRecipePart.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.recipes.parts;
+package com.willfp.eco.common.recipes.parts;
 
 import org.bukkit.Material;
 import org.bukkit.inventory.ItemStack;

src/main/java/com/willfp/eco/util/recipes/parts/RecipePart.java → src/main/java/com/willfp/eco/common/recipes/parts/RecipePart.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.recipes.parts;
+package com.willfp.eco.common.recipes.parts;
 
 import org.bukkit.inventory.ItemStack;
 import org.jetbrains.annotations.Nullable;

src/main/java/com/willfp/eco/util/recipes/parts/SimpleRecipePart.java → src/main/java/com/willfp/eco/common/recipes/parts/SimpleRecipePart.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.recipes.parts;
+package com.willfp.eco.common.recipes.parts;
 
 import lombok.Getter;
 import org.bukkit.Material;

src/main/java/com/willfp/eco/util/plugin/AbstractEcoPlugin.java

@@ -39,8 +39,8 @@
 import com.willfp.eco.util.integrations.placeholder.plugins.PlaceholderIntegrationPAPI;
 import com.willfp.eco.util.optional.Prerequisite;
 import com.willfp.eco.util.protocollib.AbstractPacketAdapter;
-import com.willfp.eco.util.recipes.RecipeListener;
-import com.willfp.eco.util.recipes.RecipeManager;
+import com.willfp.eco.util.recipe.RecipeListener;
+import com.willfp.eco.util.recipe.RecipeManager;
 import com.willfp.eco.util.updater.UpdateChecker;
 import lombok.Getter;
 import org.apache.maven.artifact.versioning.DefaultArtifactVersion;

src/main/java/com/willfp/eco/util/recipes/EcoShapedRecipe.java → src/main/java/com/willfp/eco/util/recipe/EcoShapedRecipe.java

@@ -1,12 +1,11 @@
-package com.willfp.eco.util.recipes;
+package com.willfp.eco.util.recipe;
 
+import com.willfp.eco.common.recipes.parts.EmptyRecipePart;
+import com.willfp.eco.common.recipes.parts.RecipePart;
 import com.willfp.eco.util.interfaces.Registerable;
 import com.willfp.eco.util.internal.PluginDependent;
 import com.willfp.eco.util.plugin.AbstractEcoPlugin;
-import com.willfp.eco.util.recipes.parts.EmptyRecipePart;
-import com.willfp.eco.util.recipes.parts.RecipePart;
 import lombok.Getter;
-import org.apache.commons.lang.Validate;
 import org.bukkit.Material;
 import org.bukkit.inventory.ItemStack;
 import org.jetbrains.annotations.NotNull;
@@ -184,9 +183,6 @@ public Builder setOutput(@NotNull final ItemStack output) {
          * @return The built recipe.
          */
         public EcoShapedRecipe build() {
-            Validate.notNull(output, "Output cannot be null!");
-            Validate.isTrue(output.getType() != Material.AIR, "Output cannot be blank!");
-
             for (int i = 0; i < 9; i++) {
                 if (recipeParts[i] == null) {
                     recipeParts[i] = new EmptyRecipePart();

src/main/java/com/willfp/eco/util/recipes/RecipeListener.java → src/main/java/com/willfp/eco/util/recipe/RecipeListener.java

@@ -1,8 +1,7 @@
-package com.willfp.eco.util.recipes;
+package com.willfp.eco.util.recipe;
 
 import com.willfp.eco.util.internal.PluginDependent;
 import com.willfp.eco.util.plugin.AbstractEcoPlugin;
-import org.bukkit.Bukkit;
 import org.bukkit.Material;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;

src/main/java/com/willfp/eco/util/recipes/RecipeManager.java → src/main/java/com/willfp/eco/util/recipe/RecipeManager.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.recipes;
+package com.willfp.eco.util.recipe;
 
 import com.google.common.collect.BiMap;
 import com.google.common.collect.HashBiMap;