*/
void set_file (boost::filesystem::path file) const;
+ /** Set the file that holds this asset on disk. Calling this function
+ * preserves the object's store of its hash, so if the object already
+ * has a hash it is up to the caller to ensure that the new file has
+ * the same hash.
+ *
+ * @param file New file's path.
+ */
+ void set_file_preserving_hash(boost::filesystem::path file) const;
+
/** Set the file that holds this asset on disk. The new file must
* be exactly the same as the old one, as this function assumes
* that the object's hash does not change.