Question

I have this code:

public static final <TypeVO extends BaseVo> List<SelectItem> populateSelectBoxForType(
            final Class<TypeVO> voClass, final String fieldName) {
        List<SelectItem> listSelectBox = null;
        final List<TypeVO> vosList = GenericEjbProxyFactory
                .getGenericTopValueObjectProxy(voClass)
                .getAllValueObjects(null);
        System.out.println("loaded vosList!!!!");
        if (vosList != null) {
            listSelectBox = new ArrayList<SelectItem>();
            for (final TypeVO currVo : vosList) {
                listSelectBox.add(new SelectItem(currVo.getInternalId(), currVo.getName()));
            }
        }
        return listSelectBox;
    }

As you see here, I’m using currVo.getName because always, currVo has a name property.

I want to be able to use also other fields from this currVo which has type as voClass, but not all currVo classes will contain this field so I have to use reflection to identify these getField method, something like:

for (final TypeVO currVo : vosList) {
                for (final Method m : voClass.getMethods()) {
                    if (m.getName().contains(fieldName)) {
                        listSelectBox.add(new SelectItem(
                                currVo.getInternalId(), currVo.m));
                    }
                }
            }

What I do not know is HOW I can use that specific method’s value when I find it, exactly like currVo.getName (because, of course, currVo.m is wrong)?

Eg: If fieldName is “Age” I want to put in the list: currVo.getAge()… I am simply blocked here…

Answer 1

m.invoke(currVo);

See also:

• Method javadoc

Also note the correct way to look for a method as suggested by Nik and Bohemian.