| MapPolicy | Default constructor. Create unordered unique key map when map does not exist. Use normal update mode when writing map items. |
| MapPolicy(MapOrder, MapWriteFlags) | Create unique key map with specified order when map does not exist. Use specified write flags when writing map items. |
| MapPolicy(MapOrder, MapWriteMode) |
Create unique key map with specified order when map does not exist.
Use specified write mode when writing map items.
This constructor should only be used for server versions < 4.3. is recommended for server versions >= 4.3. |