If you already have the data you need for that user, you can add a "fake" user object to the top and handle everything in the paging:
(code not tested, written in notepad++)
public class DummyPagerRepo
{
private List<Person> persons;
private Person userObject;
private int userIndex = -1;
public DummyPagerRepo(List<Person> persons, Person userObject)
{
this.persons = persons;
this.userObject = userObject;
}
public List<Person> GetPage(int pageSize, int pageOffset)
{
List<Person> results = new List<Person>(pageSize);
int start = pageOffset * pageSize;
if(pageOffset == 0)
{
result.add(userObject);
start++;
}
int end = Math.Min(persons.length, pageSize * (pageOffset + 1));
for(int i = start; i < end; i++)
{
Person person = persons[i];
if(userIndex == -1 && person.ID == userObject.ID)
{
userIndex = i;
}
else if(userIndex != i)
{
resutls.Add(person);
}
}
if(userIndex != -1 && start <= userIndex && end > userIndex && end < persons.length)
{
results.add(persons[end]);
}
return results;
}
}