How can I eliminate duplicated Enum code?

Question

I have a large number of Enums that implement this interface:

/**
 * Interface for an enumeration, each element of which can be uniquely identified by its co         


        

Answer 1

You could factor the duplicated code into a CodeableEnumHelper class:

public class CodeableEnumHelper {
    public static CodeableEnum getByCode(String code, CodeableEnum[] values) {
        for (CodeableEnum e : values) {
            if (e.getCode().equalsIgnoreCase(code)) {
                return e;
            }
        }
        return null;
    }
}

Each CodeableEnum class would still have to implement a getByCode method, but the actual implementation of the method has at least been centralized to a single place.

public enum IMType implements CodeableEnum {
    ...
    public IMType getByCode(String code) {
        return (IMType)CodeableEnumHelper.getByCode(code, this.values());
    } 
}