[Bleeding] Fix Achievement and Statistic API. Fixes BUKKIT-5305

By: t00thpick1 <t00thpick1dirko@gmail.com>

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

@@ -0,0 +1,46 @@
+package org.bukkit.event.player;
+
+import org.bukkit.Achievement;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
+
+/**
+ * Called when a player earns an achievement.
+ */
+public class PlayerAchievementAwardedEvent extends PlayerEvent implements Cancellable {
+    private static final HandlerList handlers = new HandlerList();
+    private final Achievement achievement;
+    private boolean isCancelled = false;
+
+    public PlayerAchievementAwardedEvent(Player player, Achievement achievement) {
+        super(player);
+        this.achievement = achievement;
+    }
+
+    /**
+     * Gets the Achievement being awarded.
+     * 
+     * @return the achievement being awarded
+     */
+    public Achievement getAchievement() {
+        return achievement;
+    }
+
+    public boolean isCancelled() {
+        return isCancelled;
+    }
+
+    public void setCancelled(boolean cancel) {
+        this.isCancelled = cancel;
+    }
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+}

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

@@ -0,0 +1,116 @@
+package org.bukkit.event.player;
+
+import org.bukkit.Material;
+import org.bukkit.Statistic;
+import org.bukkit.entity.EntityType;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
+
+/**
+ * Called when a player statistic is incremented.
+ * <p>
+ * This event is not called for {@link org.bukkit.Statistic#PLAY_ONE_MINUTE}
+ * or movement based statistics.
+ *
+ */
+public class PlayerStatisticIncrementEvent extends PlayerEvent implements Cancellable {
+    private static final HandlerList handlers = new HandlerList();
+    protected final Statistic statistic;
+    private final int initialValue;
+    private final int newValue;
+    private boolean isCancelled = false;
+    private final EntityType entityType;
+    private final Material material;
+
+    public PlayerStatisticIncrementEvent(Player player, Statistic statistic, int initialValue, int newValue) {
+        super (player);
+        this.statistic = statistic;
+        this.initialValue = initialValue;
+        this.newValue = newValue;
+        this.entityType = null;
+        this.material = null;
+    }
+
+    public PlayerStatisticIncrementEvent(Player player, Statistic statistic, int initialValue, int newValue, EntityType entityType) {
+        super (player);
+        this.statistic = statistic;
+        this.initialValue = initialValue;
+        this.newValue = newValue;
+        this.entityType = entityType;
+        this.material = null;
+    }
+
+    public PlayerStatisticIncrementEvent(Player player, Statistic statistic, int initialValue, int newValue, Material material) {
+        super (player);
+        this.statistic = statistic;
+        this.initialValue = initialValue;
+        this.newValue = newValue;
+        this.entityType = null;
+        this.material = material;
+    }
+
+    /**
+     * Gets the statistic that is being incremented.
+     * 
+     * @return the incremented statistic
+     */
+    public Statistic getStatistic() {
+        return statistic;
+    }
+
+    /**
+     * Gets the previous value of the statistic.
+     * 
+     * @return the previous value of the statistic
+     */
+    public int getPreviousValue() {
+        return initialValue;
+    }
+
+    /**
+     * Gets the new value of the statistic.
+     * 
+     * @return the new value of the statistic
+     */
+    public int getNewValue() {
+        return newValue;
+    }
+
+    /**
+     * Gets the EntityType if {@link #getStatistic() getStatistic()} is an
+     * entity statistic otherwise returns null.
+     * 
+     * @return the EntityType of the statistic
+     */
+    public EntityType getEntityType() {
+        return entityType;
+    }
+
+    /**
+     * Gets the Material if {@link #getStatistic() getStatistic()} is a block
+     * or item statistic otherwise returns null.
+     * 
+     * @return the Material of the statistic
+     */
+    public Material getMaterial() {
+        return material;
+    }
+
+    public boolean isCancelled() {
+        return isCancelled;
+    }
+
+    public void setCancelled(boolean cancel) {
+        this.isCancelled = cancel;
+    }
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+}