Hi Volker,
thanks for the quick response. I changed my converter to return the id
as you suggested (and I guess I had this state before but got over it
...). This way it works for the tx:selectOneChoice.
But if the object containing the person as a field is displayed in a
table now the person's id is displayed. I can avoid this by adding
special properties to the <tc:out /> tag. Or do you know a better
solution for this?
Regards,
Stefan.
Volker Weber schrieb:
> Hi Stefan,
>
> change the converter to convert from and to id
> and don't use the converter for the label.
>
> e.g.:
>
>
> List<SelectItem> items = new ArrayList<SelectItem>();
> for (Person person : list) {
> StringBuilder builder = new StringBuilder();
> if (person.getSalutation() != null) {
> builder.append(person.getSalutation().getName()).append(" ");
> }
> if (!StringUtils.isEmpty(person.getFirstname())) {
> builder.append(person.getFirstname()).append(" ");
> }
> String label = builder.append(person.getLastname())
> .append("(").append(person.getId()).append(")").toString();
> items.add(new SelectItem(person, label));
> }
>
>
> and
>
> public Object getAsObject(FacesContext context, UIComponent component,
> String value) throws ConverterException {
> if (StringUtils.isEmpty(value)) {
> return null;
> }
> try {
> int personId = Integer.parseInt(value);
> return
> ProjectManagementHelper.getProjectManagement().getPerson(personId);
> }
> } catch (NumberFormatException e) {
> LOG.error("", e);
> }
> return null;
> }
>
> public String getAsString(FacesContext context, UIComponent component,
> Object obj) throws ConverterException {
> if (obj == null) {
> LOG.info("###+++ received null value! +++###");
> return null;
> }
> if (obj instanceof Person) {
> LOG.info("###+++ received Person instance! +++###");
> return ((Person) obj).getId();
> }
> throw new ConverterException("Expected " + Person.class.getName() +
> ", received " + obj.getClass().getName());
> }
>
>
> Regards,
> Volker
>
> 2007/1/29, Stefan Hedtfeld <[EMAIL PROTECTED]>:
>> Hi,
>>
>> I'm trying to display some complex values within a tx:selectOneChoice
>> element. What I've managed so far is the following:
>>
>> 1. The tag:
>>
>> <tx:selectOneChoice
>> value="#{editorController.currentEntry.member}"
>> label="#{mainBundle.member}" >
>> <f:selectItems value="#{editorController.memberItems}" />
>> </tx:selectOneChoice>
>>
>> 2. The item list (memberItem):
>>
>> ...
>> // list is declared as List<Person> list above
>> ...
>> List<SelectItem> items = new ArrayList<SelectItem>();
>> for (Person person : list) {
>> items.add(new SelectItem(person, converter.getAsString(person)));
>> }
>> return items;
>>
>> 3. The converter registered for the Person class (an instance of
>> Converter with an additional convenience method getAsString(Person p) -
>> this method is accessible from a caller through the second interface):
>>
>> public class PersonConverter implements Converter,
>> AsStringConverter<Person> {
>>
>> private static final Log LOG =
>> LogFactory.getLog(PersonConverter.class);
>>
>> public Object getAsObject(FacesContext context, UIComponent component,
>> String value) throws ConverterException {
>> if (StringUtils.isEmpty(value)) {
>> return null;
>> }
>> try {
>> int posOpen = value.lastIndexOf("(");
>> int posClose = value.lastIndexOf(")");
>> if (posOpen >= 0 && posClose > posOpen) {
>> String substring = value.substring(posOpen + 1, posClose);
>> LOG.info("#+#+# Substring = \"" + substring + "\"");
>> int personId = Integer.parseInt(substring);
>> return
>> ProjectManagementHelper.getProjectManagement().getPerson(personId);
>> }
>> } catch (NumberFormatException e) {
>> LOG.error("", e);
>> }
>> return null;
>> }
>>
>> public String getAsString(FacesContext context, UIComponent component,
>> Object obj) throws ConverterException {
>> if (obj == null) {
>> LOG.info("###+++ received null value! +++###");
>> return null;
>> }
>> if (obj instanceof Person) {
>> LOG.info("###+++ received Person instance! +++###");
>> return getAsString((Person) obj);
>> }
>> throw new ConverterException("Expected " + Person.class.getName() +
>> ", received " + obj.getClass().getName());
>> }
>>
>> public String getAsString(Person person) {
>> StringBuilder builder = new StringBuilder();
>> if (person.getSalutation() != null) {
>> builder.append(person.getSalutation().getName()).append(" ");
>> }
>> if (!StringUtils.isEmpty(person.getFirstname())) {
>> builder.append(person.getFirstname()).append(" ");
>> }
>> return builder.append(person.getLastname()).append("
>> (").append(person.getId()).append(")").toString();
>> }
>>
>> }
>>
>> This at least works, but it is kind of ugly UI as I had to code the
>> object's internal id into the String displayed in the list. So my own
>> entry could be "Mr. Stefan Hedtfeld (2)" - which is not the intended
>> way. I'd like to simply display "Mr. Stefan Hedtfeld".
>>
>> Is there a better way to handle this?
>>
>> Regards,
>>
>> Stefan.
>>
>
