"Enum Tricks: Dynamic Enums" https://dzone.com/articles/enum-tricks-dynamic-enums

DynamicEnum.java

package com.alexr.dynaenum;

import java.io.*;
import java.lang.reflect.Array;
import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.Map;



public class DynaEnum<E extends DynaEnum<E>> {
	private static Map<Class<? extends DynaEnum<?>>, Map<String, DynaEnum<?>>> elements = 
		new LinkedHashMap<Class<? extends DynaEnum<?>>, Map<String, DynaEnum<?>>>();
	
    private final String name;

    public final String name() {
    	return name;
    }

    private final int ordinal;

    public final int ordinal() {
    	return ordinal;
    }

	protected DynaEnum(String name, int ordinal) {
		this.name = name;
		this.ordinal = ordinal;
		Map<String, DynaEnum<?>> typeElements = elements.get(getClass());
		if (typeElements == null) {
			typeElements = new LinkedHashMap<String, DynaEnum<?>>();
			elements.put(getDynaEnumClass(), typeElements);
		}
		typeElements.put(name, this);
	}
	
	@SuppressWarnings("unchecked")
	private Class<? extends DynaEnum<?>> getDynaEnumClass() {
		return (Class<? extends DynaEnum<?>>)getClass();
	}

    @Override
	public String toString() {
    	return name;
    }

    @Override
	public final boolean equals(Object other) { 
        return this == other;
    }

    @Override
	public final int hashCode() {
        return super.hashCode();
    }

    @Override
	protected final Object clone() throws CloneNotSupportedException {
    	throw new CloneNotSupportedException();
    }

    public final int compareTo(E other) {
		DynaEnum<?> self = this;
		if (self.getClass() != other.getClass() && // optimization
	            self.getDeclaringClass() != other.getDeclaringClass())
		    throw new ClassCastException();
		return self.ordinal - other.ordinal;
    }

    @SuppressWarnings("unchecked")
	public final Class<E> getDeclaringClass() {
		Class clazz = getClass();
		Class zuper = clazz.getSuperclass();
		return (zuper == DynaEnum.class) ? clazz : zuper;
    }

    @SuppressWarnings("unchecked")
	public static <T extends DynaEnum<T>> T valueOf(Class<T> enumType, String name) {
    	return (T)elements.get(enumType).get(name);
    }

    @SuppressWarnings("unused")
	private void readObject(ObjectInputStream in) throws IOException,
        ClassNotFoundException {
            throw new InvalidObjectException("can't deserialize enum");
    }

    @SuppressWarnings("unused")
	private void readObjectNoData() throws ObjectStreamException {
        throw new InvalidObjectException("can't deserialize enum");
    }

    @Override
	protected final void finalize() { }

    
    public static <E> DynaEnum<? extends DynaEnum<?>>[] values() {
    	throw new IllegalStateException("Sub class of DynaEnum must implement method valus()");
    }
    
    @SuppressWarnings("unchecked")
	public static <E> E[] values(Class<E> enumType) {
    	Collection<DynaEnum<?>> values =  elements.get(enumType).values();
    	int n = values.size();
    	E[] typedValues = (E[])Array.newInstance(enumType, n);
    	int i = 0;
    	for (DynaEnum<?> value : values) {
    		Array.set(typedValues, i, value);
    		i++;
    	}
    	
    	return typedValues;
    }
}