Interface DataReader

index/index.go:20–29

DataReader defines interface to let SlimIndex access the data it indexes.

// DataReader defines interface to let SlimIndex access the data it indexes.
type DataReader interface {
	// Read value at `offset`, of `key`.
	// Because the internal SlimTrie does not store complete info of a key(to
	// reduce memory consumption).
	// Thus the offset SlimTrie returns might not be correct for an abscent
	// record.
	// It is data providers' responsibility to check if the record at `offset`
	// has the exact `key`.
	Read(offset int64, key string) (string, bool)
}

// OffsetIndexItem defines data types for a offset-based index, such as an index
// of on-disk records.