Fix kittycannon on old versions

Essentials/src/main/java/com/earth2me/essentials/commands/Commandkittycannon.java

@@ -2,6 +2,7 @@ package com.earth2me.essentials.commands;
 
 import com.earth2me.essentials.Mob;
 import com.earth2me.essentials.User;
+import com.earth2me.essentials.utils.RegistryUtil;
 import org.bukkit.Location;
 import org.bukkit.Server;
 import org.bukkit.entity.Cat;
@@ -21,8 +22,12 @@ public class Commandkittycannon extends EssentialsCommand {
 
     private static Ocelot spawnOcelot(final Server server, final User user) throws Mob.MobException {
         final Ocelot ocelot = (Ocelot) Mob.OCELOT.spawn(user.getWorld(), server, user.getBase().getEyeLocation());
-        final int i = random.nextInt(Ocelot.Type.values().length);
+        //noinspection deprecation
-        ocelot.setCatType(Ocelot.Type.values()[i]);
+        final Object[] values = RegistryUtil.values(Ocelot.Type.class);
+
+        final int i = random.nextInt(values.length);
+        //noinspection deprecation
+        ocelot.setCatType((Ocelot.Type) values[i]);
         ((Tameable) ocelot).setTamed(true);
         ocelot.setBaby();
         ocelot.setVelocity(user.getBase().getEyeLocation().getDirection().multiply(2));
@@ -31,8 +36,10 @@ public class Commandkittycannon extends EssentialsCommand {
 
     private static Entity spawnCat(final Server server, final User user) throws Mob.MobException {
         final Cat cat = (Cat) Mob.CAT.spawn(user.getWorld(), server, user.getBase().getEyeLocation());
-        final int i = random.nextInt(Cat.Type.values().length);
+        final Object[] values = RegistryUtil.values(Cat.Type.class);
-        cat.setCatType(Cat.Type.values()[i]);
+
+        final int i = random.nextInt(values.length);
+        cat.setCatType((Cat.Type) values[i]);
         cat.setTamed(true);
         cat.setBaby();
         cat.setVelocity(user.getBase().getEyeLocation().getDirection().multiply(2));

Essentials/src/main/java/com/earth2me/essentials/utils/RegistryUtil.java

@@ -3,12 +3,50 @@ package com.earth2me.essentials.utils;
 import com.google.common.collect.HashBasedTable;
 import com.google.common.collect.Table;
 
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.List;
+
 public final class RegistryUtil {
     private static final Table<Class<?>, String, Object> registryCache = HashBasedTable.create();
 
     private RegistryUtil() {
     }
 
+    public static <T> Object[] values(Class<T> registry) {
+        if (registry.getEnumConstants() != null) {
+            return registry.getEnumConstants();
+        }
+
+        //noinspection unchecked
+        final T[] values = (T[]) registryCache.get(registry, "$values");
+        if (values != null) {
+            return values;
+        }
+
+        final List<T> set = new ArrayList<>();
+
+        for (final Field field : registry.getDeclaredFields()) {
+            try {
+                final Object value = field.get(null);
+                if (value != null && registry.isAssignableFrom(value.getClass())) {
+                    //noinspection unchecked
+                    set.add((T) value);
+                }
+            } catch (NullPointerException | IllegalAccessException ignored) {
+            }
+        }
+
+        //noinspection unchecked
+        final T[] array = (T[]) new Object[set.size()];
+        for (int i = 0; i < set.size(); i++) {
+            array[i] = set.get(i);
+        }
+        registryCache.put(registry, "$values", array);
+
+        return array;
+    }
+
     public static <T> T valueOf(Class<T> registry, String... names) {
         for (final String name : names) {
             //noinspection unchecked