Callback interface used with calls that may try to overwrite existing entries;
and if so may decide whether overwrite should or should not proceed.
Method called to determine whether specified overwrite operation should succeeed
Note that checker will only have access to metadata, not data itself, since
reading data may incur significant overhead and/or buffering.
- Whether specified existing entry may be overridden by specified new entry (or not).
com.fasterxml.storemate.store.StoreException May be thrown to indicate that overwrite operation
is not allowed, as an alternative to returning specific fail
Simple implementation that simply allows all overwrites.
Simple implementation that simply denies all overwrites.