SPIGOT-3403: Add an EntityPickupItemEvent

By: md_5 <git@md-5.net>

paper-api/src/main/java/org/bukkit/event/entity/EntityPickupItemEvent.java

@@ -0,0 +1,62 @@
+package org.bukkit.event.entity;
+
+import org.bukkit.entity.Item;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
+
+/**
+ * Thrown when a entity picks an item up from the ground
+ */
+public class EntityPickupItemEvent extends EntityEvent implements Cancellable {
+    private static final HandlerList handlers = new HandlerList();
+    private final Item item;
+    private boolean cancel = false;
+    private final int remaining;
+
+    public EntityPickupItemEvent(final LivingEntity entity, final Item item, final int remaining) {
+        super(entity);
+        this.item = item;
+        this.remaining = remaining;
+    }
+
+    @Override
+    public LivingEntity getEntity() {
+        return (LivingEntity) entity;
+    }
+
+    /**
+     * Gets the Item picked up by the entity.
+     *
+     * @return Item
+     */
+    public Item getItem() {
+        return item;
+    }
+
+    /**
+     * Gets the amount remaining on the ground, if any
+     *
+     * @return amount remaining on the ground
+     */
+    public int getRemaining() {
+        return remaining;
+    }
+
+    public boolean isCancelled() {
+        return cancel;
+    }
+
+    public void setCancelled(boolean cancel) {
+        this.cancel = cancel;
+    }
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+}

paper-api/src/main/java/org/bukkit/event/player/PlayerPickupItemEvent.java

@@ -4,10 +4,13 @@ import org.bukkit.entity.Item;
 import org.bukkit.entity.Player;
 import org.bukkit.event.Cancellable;
 import org.bukkit.event.HandlerList;
+import org.bukkit.event.entity.EntityPickupItemEvent;
 
 /**
  * Thrown when a player picks an item up from the ground
+ * @deprecated {@link EntityPickupItemEvent}
  */
+@Deprecated
 public class PlayerPickupItemEvent extends PlayerEvent implements Cancellable {
     private static final HandlerList handlers = new HandlerList();
     private final Item item;