HashDBM class

Hash-based implementation of DBM

Implemented types

• DBM

Constructors

HashDBM(RandomAccessFile file, {int buckets = 10007, bool flush = true, bool crc = false})

Open a new database. Optional parameters are: buckets which sets the number of hash buckets to use, flush which when set to true will force data to disk every time it is changed, and crc which will enable CRC checks on underlying records if set to true. The defaults are generally good enough.

Properties

file → RandomAccessFile

Get the underlying file

no setter

hashCode → int

The hash code for this object.

no setter, inherited

hashTableSize → int

Get the number of buckets in the hash table.

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

clear() → void

Erases all data and resets the internal structure, but does not reclaim storage.

override

close() → void

flush() and close the underlying file.

override

count() → int

Get the number of records stored in the database as a Uint64

override

entries() → Iterator<MapEntry<Uint8List, Uint8List>>

Iterate over all keys and values in the database

override

flush() → void

Flush all data to external storage.

override

get(Uint8List key) → Uint8List?

Get a value from the database using key, or else return null

override

modified() → DateTime

Get the last time the database was opened or modified.

override

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.

override

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.

override

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

override

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.

override

toString() → String

A string representation of this object.

inherited

version() → int

Get the version of the underlying implementation as a 32bit integer.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Properties

VERSION → int

Version of the database

final