Add API for getting and setting experience for BlockBreakEvent. Addresses BUKKIT-2033

By: feildmaster <admin@feildmaster.com>

paper-api/src/main/java/org/bukkit/event/block/BlockBreakEvent.java

@@ -8,22 +8,31 @@ import org.bukkit.event.HandlerList;
 /**
  * Called when a block is broken by a player.
  * <p />
+ * If you wish to have the block drop experience, you must set the experience value above 0.
+ * By default, experience will be set in the event if:
+ * <ol>
+ * <li />The player is not in creative or adventure mode
+ * <li />The player can loot the block (ie: does not destroy it completely, by using the correct tool)
+ * <li />The player does not have silk touch
+ * <li />The block drops experience in vanilla MineCraft
+ * </ol>
+ * <p />
  * Note:
- * Plugins wanting to simulate a traditional block drop should set the block to air and utilise their own methods for determining
+ * Plugins wanting to simulate a traditional block drop should set the block to air and utilize their own methods for determining
  *   what the default drop for the block being broken is and what to do about it, if anything.
  * <p />
- * If a Block Break event is cancelled, the block will not break.
+ * If a Block Break event is cancelled, the block will not break and experience will not drop.
  */
 public class BlockBreakEvent extends BlockEvent implements Cancellable {
 
     private static final HandlerList handlers = new HandlerList();
     private final Player player;
     private boolean cancel;
+    private int exp;
 
     public BlockBreakEvent(final Block theBlock, final Player player) {
         super(theBlock);
         this.player = player;
-        this.cancel = false;
     }
 
     /**
@@ -35,6 +44,24 @@ public class BlockBreakEvent extends BlockEvent implements Cancellable {
         return player;
     }
 
+    /**
+     * Get the experience to drop after the block is broken.
+     *
+     * @return The experience to drop
+     */
+    public int getExpToDrop() {
+        return exp;
+    }
+
+    /**
+     * Set the amount of experience to drop after the block is broken.
+     *
+     * @param exp 1 or higher to drop experience, or else nothing will drop
+     */
+    public void setExpToDrop(int exp) {
+        this.exp = exp;
+    }
+
     public boolean isCancelled() {
         return cancel;
     }