ObjectSpace :: asDatabase - Get object space as database
The function returns the ObjectSpace as Database, when the ObjectSpace is a Database. When the object space is not a database, the function throws an exception. In order to avoid exceptions, one may check the object space by calling isDatabase().
Database GetDatabase ( ObjectSpace &os ) {
return os.isDatabase() ? os.asDatabase() : Database();
}
Return value: Database handle ( odaba::Database & )
The database handle refers to an (usually) opened database. Calling functions with invalid database handles may cause an exception. For checking the database handle, isValid() can be called.