newDistanceSort
Creates a SortField for sorting by distance from a location.
This sort orders documents by ascending distance from the location. The value returned in FieldDoc for the hits contains a Double instance with the distance in meters.
If a document is missing the field, then by default it is treated as having distance (missing values sort last).
If a document contains multiple values for the field, the closest distance to the location is used.
Return
SortField ordering documents by distance
Parameters
field
field name. must not be null.
x
x at the center.
y
y at the center.
Throws
if field is null or location has invalid coordinates.