Public Member Functions | |
virtual std::string | operator() (const Xapian::Document &doc) const |
Build a key string for a Document. |
Results are ordered by the first value. In the event of a tie, the second is used. If this is the same for both, the third is used, and so on.
becomes:
MultiValueKeyMaker sorter; // Primary ordering is forwards on value 4. sorter.add_value(4); // Secondary ordering is reverse on value 5. sorter.add_value(5, true);
virtual std::string Xapian::MultiValueSorter::operator() | ( | const Xapian::Document & | doc | ) | const [virtual] |
Build a key string for a Document.
These keys can be used for sorting or collapsing matching documents.
doc | Document object to build a key for. |
Implements Xapian::KeyMaker.