5:27 a.m.
This is probably obvious to all of you, but taken me days to get this working (and still
not sure how!).
Inside an Entity I have an internationalised enum (as I am hoping to persist a value of
its kind with the Entity):
| @SuppressWarnings("serial")
| @Entity // Defines this as an Entity that is a class mapped toDate the Datastore.
| @Name("booking") // Name used within SEAM for an instance of this class.
| public class Booking implements Serializable {
|
| public enum OrganisationKind {
| PRIVATE_BOOKING ("booking_private"),
| PRIVATE_BOOKING_OPEN ("booking_private_open"),
| NON_PROFIT_ORG ("booking_non_profit_org"),
| COMMERCIAL ("booking_commercial_org"),
| OPEN_EVENT ("booking_open_event"); // Only booked by Selwyn
Equestrian Staff
| private final String inlLabel;
| OrganisationKind(String inlLabel) {
| this.inlLabel = inlLabel;
| }
| public String getInlLabel() { return inlLabel; }
| }
|
| ...
| private OrganisationKind organisationKind;
| ...
|
I have a controller that requires this enum to be displayed as selectOneRadio... these
routines handle the selection:
| public Map getOrganisationKindList();
|
| public Booking.OrganisationKind getSelectedOrganisationKind();
|
| public void setSelectedOrganisationKind(Booking.OrganisationKind orgKind); not use
I need this one as the Change fires ok
|
| public void selectedOrganisationKindChanged(ValueChangeEvent event);
|
The Impl:
| ...
| /**
| * The currently selected Booking Type
| */
| private Booking.OrganisationKind selectedOrganisationKind;
|
| ...
|
| public Map getOrganisationKindList() {
| Map<String,Booking.OrganisationKind> choices = new
HashMap<String,Booking.OrganisationKind>();
| for (Booking.OrganisationKind type : Booking.OrganisationKind.values()) {
| choices.put(messages.get(type.getInlLabel()), type);
| }
| return choices;
| }
|
| public Booking.OrganisationKind getSelectedOrganisationKind() {
| return selectedOrganisationKind;
| }
|
| public void setSelectedOrganisationKind(Booking.OrganisationKind orgKind) {
| this.selectedOrganisationKind = orgKind;
| }
|
| public void selectedOrganisationKindChanged(ValueChangeEvent event) {
| if (event.getNewValue() != null) {
| Booking.OrganisationKind theOrganisationKind =
Booking.OrganisationKind.valueOf(event.getNewValue().toString());
| selectedOrganisationKind = theOrganisationKind;
| } else {
| log.error("null new event passed in. Error!");
| }
| }
|
|
The screen shows all this using:
| <ice:panelGrid columns="1" styleClass="center">
| <ice:selectOneRadio
| value="#{availabilityController.selectedOrganisationKind}"
|
valueChangeListener="#{availabilityController.selectedOrganisationKindChanged}"
| partialSubmit="true"
| layout="pageDirection"
| converter="#{enumTypeConverter}">
| <f:selectItems
value="#{availabilityController.organisationKindList}"/>
| </ice:selectOneRadio>
| </ice:panelGrid>
|
Now... I have to provide a Converter (no idea if this is right.. and the screen seems to
find this without outjecting it to the view at all!!):
| @Intercept(InterceptionType.NEVER)
| @SuppressWarnings("serial")
| @Stateless // A new component is created or re-initialised and re-used each time it is
called.
| @Name("enumTypeConverter") // Name used within SEAM for an instance of this
class.
| // All stateless session beans belong to the Stateless Context Scope
| public class EnumTypeConverterImpl implements EnumTypeConverter {
|
| @SuppressWarnings("unchecked")
| public Object getAsObject(FacesContext context, UIComponent comp, String value)
throws ConverterException {
| Class enumType = comp.getValueBinding("value").getType(context);
| return Enum.valueOf(enumType, value);
| }
|
| public String getAsString(FacesContext context, UIComponent component, Object object)
throws ConverterException {
| if (object == null) {
| return null;
| }
| Enum type = (Enum) object;
| return type.toString();
| }
|
| }
|
Anyhow, it may help some poor sap in the future!
FINALLY GOT TO USE INTERNATIONALISED ENUMS!!!
From the screen:
| O open booking (Selwyn Equestrian Centre staff only)
| O commercial booking (e.g. NZ Elite Horse Auctions Ltd.)
| O private booking but open to anyone (cost is per horse - max of 4 places)
| O non profit booking (Dressage Canterbury etc.)
| O private booking (cost is for Arena) <<---Selected
|
|
| Result (on screen and in controller) = PRIVATE_BOOKING
|
:)
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