Clean up reflection, add resource pack image and reload listener

src/main/java/com/tterrag/blur/util/ReflectionHelper.java

@@ -0,0 +1,36 @@
+package com.tterrag.blur.util;
+
+import java.lang.reflect.Field;
+import java.util.Arrays;
+
+public class ReflectionHelper {
+	
+	@SuppressWarnings("unchecked")
+	public static <T> T getValue(Class<?> cls, Object instance, String...names) {
+		try {
+			return (T) getField(cls, names).get(instance);
+		} catch (IllegalAccessException e) {
+			throw new RuntimeException(e);
+		}
+	}
+	
+	public static Field getField(Class<?> cls, String... names) {
+		for (String name : names) {
+			Field f = getFieldInternal(cls, name);
+			if (f != null) {
+				return f;
+			}
+		}
+		throw new IllegalArgumentException("Could not find any of fields " + Arrays.toString(names) + " on class " + cls);
+	}
+
+	private static Field getFieldInternal(Class<?> cls, String name) {
+		try {
+			Field f = cls.getDeclaredField(name);
+			f.setAccessible(true);
+			return f;
+		} catch (NoSuchFieldException | SecurityException e) {
+			return null;
+		}
+	}
+}