Add easier Enum Support in ArgumentUtils

SpigotCore_Main/src/de/steamwar/command/Argument.java

@@ -47,8 +47,6 @@ public class Argument<T> {
 
     public static final Argument<Boolean> BOOLEAN = new Argument<>(Boolean::parseBoolean, bool -> true, "true", "false");
     public static final Argument<Integer> INT = new Argument<>(Integer::parseInt, integer -> true);
-    public static final Argument<Long> LONG = new Argument<>(Long::parseLong, l -> true);
-    public static final Argument<Float> FLOAT = new Argument<>(Float::parseFloat, f -> true);
     public static final Argument<Double> DOUBLE = new Argument<>(Double::parseDouble, d -> true);
     public static final Argument<String> STRING = new Argument<>(s -> s, string -> true);
 

SpigotCore_Main/src/de/steamwar/command/ArgumentUtils.java

@@ -21,6 +21,7 @@
 package de.steamwar.command;
 
 import java.util.Arrays;
+import java.util.Objects;
 import java.util.function.BiPredicate;
 import java.util.function.Predicate;
 import java.util.stream.Stream;
@@ -51,6 +52,17 @@ public class ArgumentUtils {
         return new Argument<>(s -> s, string -> contains(commands, string, String::equals), s -> supply(s, tabCompletes, commands));
     }
 
+    public static <T extends Enum<?>> Argument<T> enumValue(Class<T> enumClass) {
+        T[] enumValues = enumClass.getEnumConstants();
+        String[] strings = Arrays.stream(enumValues).map(Enum::name).toArray(String[]::new);
+        return new Argument<>((s, sender) -> {
+            for (T enumValue : enumValues) {
+                if (enumValue.name().startsWith(s)) return enumValue;
+            }
+            return null;
+        }, Objects::nonNull, s -> strings);
+    }
+
     public static Argument<String> ofIgnoreCase(String... arguments) {
         return new Argument<>(s -> s, string -> contains(arguments, string, String::equals), arguments);
     }