Helge Hartmann wrote:
>Now I have a combo, where someone can choose one of these values. Because I
>don't want to use the toString() method, I have a String array, holding the
>values for the combo. But I don't have an idea how to create a good
>mapping, because it must work in both directions. At the moment I am using
>switch statements for the mapping. But this seems error prone, when
>changing something. There must be a better way.
Create a customized model that encapsulates the bi-directional mapping.
Then use that as the model behind your component. The model class should
be composed from the behaviors, though not necessarily the API's, of
simpler classes like Map and List.
If you encapsulate all this, then the use of two Maps inside the model
object isn't externally visible. I did something like this for the Lookup
interface in my open source Suite/P Toolkit of Posix features:
<http://www.amug.org/~glguerin/sw/#suitep>
The concrete implementation is SimpleLookup. It uses two Hashtables
internally, but it could easily be two Maps. I chose Hashtable for
compatibility with Java versions that lack Map.
If you want ordering on one of the Maps, such as the names, so they can
represent a sequence of items in a combo-box, you may want to use an
ordered Map, or have some other way to manage the sequential aspect of the
model's representation.
> case 3: vul = Vulnerability.NONE; break;
Shouldn't that be:
vul = Vulnerability.BOTH;
-- GG
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