gistfile1.txt

public class ParcelableMessage<T extends MessageMicro> implements Parcelable {
    public int messageType;
    public byte[] protoBytes;
    private T mProto;

    public T getProto() {
        if (mProto == null) {
            mProto = getProto(this);
        }
        return mProto;
    }

    public static <T extends MessageMicro> T getProto(ParcelableMessage<T> response) {
        switch (response.messageType) {
            case ALPHA :
                return (T) Alpha.AlphaParser.parse(response.protoBytes);
            case BETA :
                return (T) Beta.BetaParser.parse(response.protoBytes);
            default :
                return null;
        }
    }
}