How to use Converter in NativeSelect

Hi, I have a Boolean (or enum) data and want to display in NativeSelect in String model:

    @Override
    protected void init(VaadinRequest request) {
        
        final VerticalLayout layout = new VerticalLayout();
        layout.setMargin(true);
        setContent(layout);

        String YES = "Yes";
        String NO ="No";
        
        final NativeSelect select = new NativeSelect("Choose");
        select.addItems(Arrays.asList(new String[]{YES, NO}));
        select.setNullSelectionAllowed(false);
        
        Boolean dateModelValue = Boolean.FALSE;

//        StringToBooleanConverter converter = new StringToBooleanConverter("Yes","No");
//        select.setValue(converter);

/*        // case 1
        select.setConverter(Boolean.class);
        select.setValue(dateModelValue);
        
        // case 2
        select.setConverter(String.class);
        select.setValue(dateModelValue);
*/        
        // case 3
        select.setConverter(Boolean.class);
        select.setValue(NO);
        
        // case 4
/*        select.setConverter(String.class);
        select.setValue(NO);        
*/        
        select.addValueChangeListener(new ValueChangeListener() {
            @Override
            public void valueChange(ValueChangeEvent event) {
                Notification.show(String.format("value=%s, converted value=%s", select.getValue(), select.getConvertedValue()));                
            }            
        });            
        
        layout.addComponent(select);
    }

I assume that setConvert(...) could support vaule return Boolean and converted value String, or in contrast.
1. public void setConverter(Class<?> datamodelType) - test 4 cases above, the results are not as wanted.
2. setConverter(Converter<T, ?> converter) - report StringToBooleanConverter is not applicable for the arguments.

So my question is whether setConvert(...) supports NativeSelect for the purpose. if yes, how.

Hi,
setConverter(Class<?> datamodelType) takes the converter from a ConvertFactory. In case of Boolean.class the StringToBooleanConverter is used.
StringToBooleanConverter by default map the strings "true" and "false" to the equivalent boolean values, but you can change this mapping 

new StringToBooleanConverter(YES, NO);

In case of NativeSelect you should use an unchecked assingment in setConverter(...) because NativeSelect, due to type parameter, expects a Converter<Object, ?> whereas StringToBooleanConverter is a Converter<String, Boolean> 

Converter converter = new StringToBooleanConverter(YES, NO);
select.setConverter(converter);

HTH
Marco
 

Thanks Marco, it works.