#537: Add EntitySpellCastEvent for spellcaster illager

By: Parker Hawke <hawkeboyz2@hotmail.com>

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

@@ -0,0 +1,62 @@
+package org.bukkit.event.entity;
+
+import org.bukkit.entity.Spellcaster;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Called when a {@link Spellcaster} casts a spell.
+ */
+public class EntitySpellCastEvent extends EntityEvent implements Cancellable {
+
+    private static final HandlerList handlers = new HandlerList();
+    //
+    private boolean cancelled = false;
+    private final Spellcaster.Spell spell;
+
+    public EntitySpellCastEvent(@NotNull Spellcaster what, @NotNull Spellcaster.Spell spell) {
+        super(what);
+        this.spell = spell;
+    }
+
+    @Override
+    @NotNull
+    public Spellcaster getEntity() {
+        return (Spellcaster) entity;
+    }
+
+    /**
+     * Get the spell to be cast in this event.
+     *
+     * This is a convenience method equivalent to
+     * {@link Spellcaster#getSpell()}.
+     *
+     * @return the spell to cast
+     */
+    @NotNull
+    public Spellcaster.Spell getSpell() {
+        return spell;
+    }
+
+    @Override
+    public void setCancelled(boolean cancelled) {
+        this.cancelled = cancelled;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return cancelled;
+    }
+
+    @Override
+    @NotNull
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    @NotNull
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+}