TypeEnum.java

public enum TypeEnum {

    INT {
        @Override
        protected boolean acceptInternal(Object parameter) {
            Class<?> clazz = parameter.getClass();
            return clazz.isAssignableFrom(Integer.class) || clazz.isAssignableFrom(int.class);
        }

        @Override
        protected String applyInternal(Object parameter) {
            return String.valueOf(parameter);
        }

        @Override
        protected Object unapplyInternal(String parameter) {
            return Integer.parseInt(parameter);
        }
    },
    DOUBLE {
        @Override
        protected boolean acceptInternal(Object parameter) {
            Class<?> clazz = parameter.getClass();
            return clazz.isAssignableFrom(Double.class) || clazz.isAssignableFrom(double.class);
        }

        @Override
        protected String applyInternal(Object parameter) {
            return parameter + "d";
        }

        @Override
        protected Object unapplyInternal(String parameter) {
            return Double.parseDouble(parameter);
        }
    }
    // ....
    ;


    protected abstract boolean acceptInternal(Object parameter);

    protected abstract String applyInternal(Object parameter);

    protected abstract Object unapplyInternal(String parameter);

    public static String apply(Object parameter) {
        for (TypeEnum value : values()) {
            if(value.acceptInternal(parameter)) {
                return value.applyInternal(parameter);
            }
        }
        throw new IllegalArgumentException("Not supported");
    }

    public static Object unapply(String parameter) {
        for (TypeEnum value : values()) {
            if(value.acceptInternal(parameter)) {
                return value.unapplyInternal(parameter);
            }
        }
        throw new IllegalArgumentException("Not supported");
    }
}


class Invoker {

    public static void apply(Object parameter) {
        System.out.println(TypeEnum.apply(parameter));
    }

    public static void unapply(String parameter) {
        System.out.println(TypeEnum.unapply(parameter));
    }
}