Fix stuff

src/de/steamwar/command/SWCommandUtils.java

@@ -192,19 +192,19 @@ public class SWCommandUtils {
         GUARD_FUNCTIONS.putIfAbsent(name, guardChecker);
     }
 
-    public static <K> AbstractTypeMapper<K, String> createMapper(String... values) {
+    public static <T extends AbstractTypeMapper<K, String>, K> T createMapper(String... values) {
         List<String> strings = Arrays.asList(values);
         return createMapper((s) -> strings.contains(s) ? s : null, s -> strings);
     }
 
-    public static <T, K> AbstractTypeMapper<K, T> createMapper(Function<String, T> mapper, Function<String, List<String>> tabCompleter) {
+    public static <T extends AbstractTypeMapper<K, V>, K, V> T createMapper(Function<String, V> mapper, Function<String, List<String>> tabCompleter) {
         return createMapper(mapper, (commandSender, s) -> tabCompleter.apply(s));
     }
 
-    public static <T, K> AbstractTypeMapper<K, T> createMapper(Function<String, T> mapper, BiFunction<K, String, List<String>> tabCompleter) {
-        return new AbstractTypeMapper<K, T>() {
+    public static <T extends AbstractTypeMapper<K, V>, K, V> T createMapper(Function<String, V> mapper, BiFunction<K, String, List<String>> tabCompleter) {
+        return (T) new AbstractTypeMapper<K, V>() {
             @Override
-            public T map(K commandSender, String[] previousArguments, String s) {
+            public V map(K commandSender, String[] previousArguments, String s) {
                 return mapper.apply(s);
             }
 
@@ -215,12 +215,12 @@ public class SWCommandUtils {
         };
     }
 
-    public static AbstractTypeMapper<?, Enum<?>> createEnumMapper(Class<Enum<?>> enumClass) {
+    public static <T extends AbstractTypeMapper<K, Enum<?>>, K> T createEnumMapper(Class<Enum<?>> enumClass) {
         Map<String, Enum<?>> enumMap = new HashMap<>();
         for (Enum<?> e : enumClass.getEnumConstants()) {
             enumMap.put(e.name(), e);
         }
-        return new AbstractTypeMapper<Object, Enum<?>>() {
+        return (T) new AbstractTypeMapper<Object, Enum<?>>() {
             @Override
             public Enum<?> map(Object commandSender, String[] previousArguments, String s) {
                 return enumMap.get(s);