VersionedDBM class abstract

A DBM with delta overlay transactions and version history.

Implemented types
Implementers

Constructors

VersionedDBM()

Properties

current → int
Current (latest) version number.
no setter
hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
versions → List<int>
List of available versions (base..current).
no setter

Methods

at(int version) → DBM
Read-only view at a specific version.
begin() → Transaction
Start a new transaction.
clear() → void
Erases all data and resets the internal structure, but does not reclaim storage.
inherited
close() → void
flush() and close the underlying file.
inherited
compact() → int
Truncate trailing free blocks at end-of-file and return bytes reclaimed.
inherited
count() → int
Get the number of records stored in the database as a Uint64
inherited
entries() → Iterator<MapEntry<Uint8List, Uint8List>>
Iterate over all keys and values in the database
inherited
flatten() → void
Merge all deltas into the base table and convert to plain format. After flattening, the file can be reopened with plain HashDBM.
flush() → void
Flush all data to external storage.
inherited
get(Uint8List key) → Uint8List?
Get a value from the database using key, or else return null
inherited
merge({int? through}) → void
Merge deltas through the given version into the base table. If through is null, merges all deltas through current.
modified() → DateTime
Get the last time the database was opened or modified.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
put(Uint8List key, Uint8List value) → Uint8List?
Add a key, value pair to the underlying store, overwriting any existing values. Returns the old value if one existed, otherwise returns the new value.
inherited
putIfAbsent(Uint8List key, Uint8List value) → Uint8List
Add a key, value pair to the underlying store if not key is in the underlying store. Returns the old value if key existed, otherwise value is returned.
inherited
remove(Uint8List key) → Uint8List?
Remove a value from the database using key. If the key had an associated value, return the value or else return null
inherited
size() → int
Get the size, in bytes, of data stored. This is intended to track approximate data size and will differ from the size of the file itself.
inherited
toString() → String
A string representation of this object.
inherited
version() → int
Get the version of the underlying implementation as a 32bit integer.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited