Is it possible with QBE to generate an "or" where clause instead of "and"

Heres an example of what I mean.

POJO
User
{
firstname = "joe"
lastname="hibernate"
}

Example ex = Example.create( u ).ignoreCase().enableLike( MatchMode.ANYWHERE );
getSession().createCriteria( User.class )
.add( ex );

generates sql like:
select .... from user where firstname='joe' AND lastname='hibernate'

is possible to get it to do this instead
select ....from user where firstname='joe' OR lastname='hibernate'