import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
public class Util {
/**
* Locates generic declaration by index on a class.
*
* @param clazz clazz The class to introspect
* @param index the Index of the generic ddeclaration,start from 0.
*/
public static Class getGenericClass(Class clazz, int index) {
Type genType = clazz.getGenericSuperclass();
if (genType instanceof ParameterizedType) {
Type[] params = ((ParameterizedType) genType).getActualTypeArguments();
if ((params != null) && (params.length >= (index - 1))) {
return (Class) params[index];
}
}
return null;
}
}