Hibernate @Enumerated mapping

Question

Hibernate provides @Enumerated annotation which supports two types of Enum mapping either using ORDINAL or STRING. When w

Answer 1

Here is an example which uses annotations.

http://www.gabiaxel.com/2011/01/better-enum-mapping-with-hibernate.html

It's still based off of a custom UserType. Four and a half years later and I'm still not aware of a better way to do this.

Typically, I persist my enum values as a char / int, some simple ID, then use a transient method that finds the appropriate enum by the simple ID value, e.g.

@Transient
public MyEnum getMyEnum() {
    return MyEnum.findById(simpleId); // 
}

and...

public enum MyEnum {
    FOO('F'),
    BAR('B');

    private char id;
    private static Map myEnumById = new HashMap();

    static {
        for (MyEnum myEnum : values()) {
            myEnumById.put(myEnum.getId(), myEnum);
        }
    }

    private MyEnum(char id) {
        this.id = id;
    }

    public static MyEnum findById(char id) {
        return myEnumById.get(id);
    }

    public char getId() {
        return id;
    }
}