Added .item:serializer module to automatically load and save item o…

…bjects.

Added parsers:
- [EnchantmentParser](item/serializer/src/main/java/it/angrybear/serializers/EnchantmentParser.java);
- [ItemParser](item/serializer/src/main/java/it/angrybear/serializers/ItemParser.java);
- [ShapeParser](item/serializer/src/main/java/it/angrybear/serializers/ShapeParser.java);
- [ShapedRecipeParser](item/serializer/src/main/java/it/angrybear/serializers/ShapedRecipeParser.java);
- [ShapelessRecipeParser](item/serializer/src/main/java/it/angrybear/serializers/ShapelessRecipeParser.java);
- [FurnaceRecipeParser](item/serializer/src/main/java/it/angrybear/serializers/FurnaceRecipeParser.java).
Added [YAGLParser](item/serializer/src/main/java/it/angrybear/serializers/YAGLParser.java) to automatically load parsers.
Moved everything to package `it.angrybear.yagl`.
Reworked `Item#copy()` method: it will try to get a default empty constructor from the current class. If it fails, it defaults to `ItemImpl`.
Fixed `Item#copy(Class)` with automatic resolution of interfaces: passing `Item` or `BukkitItem` will convert them into `ItemImpl` and `BukkitItemImpl`.
Fixed `Item#copy(Class)` not checking if current item has field of receiving class.
Fixed various bugs in **ShapedRecipe**.
Fixed recipes not copying items in their most default state (Item).
Fixed invalid casts to `BukkitItem` in `ItemUtils`.
Fixed `ItemUtils`: now it will apply model data only for values higher than 0.
Fixed visibility issues in `PersistentListener`: every event method is now protected.
Fixed PersistentListener not checking for main hand upon interacting.
Updated FulmiCollection to version 1.4.1.

item/bukkit/src/main/java/it/angrybear/yagl/listeners/PersistentListener.java

@@ -22,21 +22,26 @@
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.Map;
+import java.util.*;
 import java.util.function.Consumer;
 
 /**
  * A listener for {@link PersistentItem}s.
  */
 public class PersistentListener implements Listener {
     private static boolean INITIALIZED = false;
+    /**
+     * Timeout, in milliseconds, to check before calling {@link #on(PlayerInteractEvent)}.
+     * This is used to prevent double calls.
+     */
+    private static long INTERACT_TIMEOUT = 10;
+    private final Map<UUID, Long> lastUsed;
 
     /**
      * Instantiates a new Persistent listener.
      */
-    public PersistentListener() {
+    public PersistentListener(Map<UUID, Long> lastUsed) {
+        this.lastUsed = lastUsed;
         INITIALIZED = true;
     }
 
@@ -67,6 +72,10 @@ protected void on(PlayerDeathEvent event) {
     protected void on(PlayerInteractEvent event) {
         if (event.getHand() != EquipmentSlot.HAND) return;
         Player player = event.getPlayer();
+        long lastUsed = this.lastUsed.getOrDefault(player.getUniqueId(), 0L);
+        long now = new Date().getTime();
+        if (now < lastUsed + INTERACT_TIMEOUT) return;
+        this.lastUsed.put(player.getUniqueId(), now);
         interactPersistentItem(event.getItem(), player, event.getAction(), cancelled(event));
     }