import static org.apache.tapestry5.ioc.internal.util.CollectionFactory.
newList;
Andy Pahne <andy.pa...@gmail.com>
28.01.2010 15:37
Bitte antworten an
"Tapestry users" <users@tapestry.apache.org>
An
Tapestry users <users@tapestry.apache.org>
Kopie
Thema
Re: Easy Way to create a select model?
It also contains a function call newList(), but this method isn't there.
Am 28.01.2010 15:17, schrieb Kristian Marinkovic:
> something like this:
>
> usage:
> SelectModel m = SelectModelUtils.toBeanSelectModel(someList, "name",
"id"
> );
>
> explanation:
> use the value of the property "name" as label, the value of the "id"
> property as value;
> assuming that the bean within the list contains this properties
> (RuntimeException otherwise)
>
> code:
> public class SelectModelUtils
> {
> private static final BeanUtilsBean beanUtil = BeanUtilsBean.
> getInstance();
>
> /**
> * Converts a list of beans to a {...@link SelectModel} using the
values
> of labelField and valueField.
> */
> public static<E> SelectModel toBeanSelectModel(List<E>
beanList,
> String labelField, String valueField)
> {
> return new
SimpleSelectModel(toBeanOptionModels(beanList,
> labelField, valueField));
> }
>
> public static<E> SelectModel toBeanSelectModel(List<E> input,
> String labelField)
> {
> return toBeanSelectModel(input, labelField, null);
> }
>
> /**
> * Converts a list of beans to a list of {...@link OptionModel}s using
> getters for label and value.
> */
> private static<E> List<OptionModel> toBeanOptionModels(List<E>
> beanList, String labelField, String valueField)
> {
> Defense.notNull(beanList, "beanList");
>
> List<OptionModel> result = newList();
>
> for (E bean : beanList)
> result.add(toBeanOptionModel(bean, labelField,
valueField));
>
> return result;
> }
>
> /**
> * Converts an bean to an {...@link OptionModel} using getters for
label
> and value.
> */
> private static<E> OptionModel toBeanOptionModel(E bean, String
> labelField, String valueField)
> {
> if(bean != null) try
> {
> String label = beanUtil.getProperty(bean,
> labelField);
> Object value = valueField == null ? bean :
> beanUtil.getPropertyUtils().getProperty(bean, valueField);
> return new SimpleOptionModel<Object>(value,
> label);
> }
> catch (Exception e)
> {
> throw new RuntimeException(e);
> }
> return new SimpleOptionModel<E>(bean);
> }
> }
>
>
>
> Andy Pahne<andy.pa...@gmail.com>
> 28.01.2010 15:14
> Bitte antworten an
> "Tapestry users"<users@tapestry.apache.org>
>
>
> An
> users@tapestry.apache.org
> Kopie
>
> Thema
> Easy Way to create a select model?
>
>
>
>
>
>
>
>
> I feel a little dumb, because for years I have been using Tapestry.
>
> Is there an _easy_ way og creating a SelectModel like this one (not so
> uncommon one):
>
> value label
> ---------------------
> 1 Jan
> 2 Feb
> ...
>
>
> I had a look at the documentation. But I cannot believe I have to deal
> with SelectModel, OptionModel, OptionGroupModel and whatelse for this
> simple usecase.
>
> I also had a look at the Wiki. I found four pages about selects. I
> cannot believe that I have to use such bloat for my usecase.
>
> I surely must be missing something, or not?
>
> Andy
>
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org
> For additional commands, e-mail: users-h...@tapestry.apache.org
>
>
>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org
For additional commands, e-mail: users-h...@tapestry.apache.org
