Question

I’m searching for something that works like BeanUtils.describe, but working on .class, not object ? Anybody help ? Currently i’m working on list of objects class with default getHeaders method like below.

public class SimpleList<E>  {
    protected final Class<E> clazz;

    SimpleList(Class<E> clazz) {
        this.clazz = clazz;
    }

    public String[] getHeaders() {
        Map props = BeanUtils.describe(clazz); // replace this with something
        return (String[]) props.keySet().toArray();
    }
}

Answer 1

Use the Introspector API:

PropertyDescriptor[] propertyDescriptors = 
    Introspector.getBeanInfo(beanClass).getPropertyDescriptors();
List<String> propertyNames = new ArrayList<String>(propertyDescriptors.length);
for (PropertyDescriptor propertyDescriptor : propertyDescriptors) {
    propertyNames.add(propertyDescriptor.getName());
}