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Subject: Re: Enum mixin?
Date: Fri, 21 Oct 2011 16:16:00 -0700
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On 10/21/2011 2:37 PM, Robert Klemme wrote:

> On 21.10.2011 23:19, A. W. Dunstan wrote:
>> I'm ok with leaving it the way it is, but does anyone know of a better
>> approach? Preferably one that's not so complex that it's worse than my
>> current state of affairs?

> I don't think it gets any better. Even if you go away from enums and
> create an abstract base class etc. you'll have to do the typing for the
> values plus you need to take care of serialization etc.


I would have thought that an abstract base class would get you what you 
need.  Maybe I'm overlooking something.  The second class here seems to 
remove a lot of boilerplate, esp considering my IDE will write the 
constructor for me (since it's the only one available).


package quicktest;

import java.io.Serializable;

public abstract class AbstactEnum implements Serializable {

    private final int value;
    private final String name;

    public AbstactEnum(int value, String name) {
       this.value = value;
       this.name = name;
    }

    public String getName() {
       return name;
    }

    public int getValue() {
       return value;
    }
}

final class CloudModel extends AbstactEnum {

    /*
     * value   meaning
    -----   ---------
    0       no clouds
    1       cumulus
    2       altostratus
    18      cirrus */
    public static final CloudModel NONE = new CloudModel(0, "No Clouds");
    public static final CloudModel CUMULUS = new CloudModel(1, "Cumulus");
    public static final CloudModel ALTOSTRATUS = new CloudModel(2, 
"Altostratus");
    public static final CloudModel CIRRUS = new CloudModel(18, "Cirrus");

    public CloudModel(int value, String name) {
       super(value, name);
    }
}