VirtualFileSystem class abstract base

A virtual filesystem used by sqlite3 to access the current I/O environment.

Due to a lack of necessity on other platforms, registering instances of virtual file systems is only supported with the web backend of this package.

Instead of having an integer return code, file system implementations should throw a VfsException to signal invalid operations. For details on the individual methods, consult the sqlite3.h header file and its documentation.

For a file system implementation that implements a few methods already, consider extending BaseVirtualFileSystem.

Implementers

• BaseVirtualFileSystem

Constructors

VirtualFileSystem(String name)

Properties

hashCode → int

The hash code for this object.

no setter, inherited

name → String

The name of this virtual file system.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

xAccess(String path, int flags) → int

Check whether a file can be accessed.

xCurrentTime() → DateTime

Returns the current time.

xDelete(String path, int syncDir) → void

Delete a file.

xFullPathName(String path) → String

Resolves a path name supplied by the user into a path that can be used by the other methods of this VFS.

xOpen(Sqlite3Filename path, int flags) → XOpenResult

Opens a file, returning supported flags and a file instance.

xRandomness(Uint8List target) → void

Fill the target with random bytes.

xSleep(Duration duration) → void

Sleeps for the passed duration.

Operators

operator ==(Object other) → bool

The equality operator.

inherited