Package one.microstream.afs

Class AFile.Wrapper.Abstract<U>

java.lang.Object

one.microstream.afs.AItem.Base

one.microstream.afs.AFile.Wrapper.Abstract<U>

All Implemented Interfaces:

AFile, AFile.Wrapper, AItem, AItem.Wrapper

Direct Known Subclasses:

BlobStoreFileWrapper.Abstract, NioFileWrapper.Abstract, SqlFileWrapper.Abstract

Enclosing interface:

AFile.Wrapper

public abstract static class AFile.Wrapper.Abstract<U>
extends AItem.Base
implements AFile.Wrapper

Nested Class Summary

Nested classes/interfaces inherited from interface one.microstream.afs.AFile

AFile.Default, AFile.Observer, AFile.Wrapper

Nested classes/interfaces inherited from interface one.microstream.afs.AFile.Wrapper

AFile.Wrapper.Abstract<U>

Nested classes/interfaces inherited from interface one.microstream.afs.AItem

AItem.Abstract, AItem.Base, AItem.Wrapper

Constructor Summary

Constructors

Constructor	Description
Abstract()

Method Summary

Modifier and Type	Method	Description
AFile	actual()
boolean	exists()	Queries whether the item represented by this instance actually physically exists on the underlying storage layer.
AFileSystem	fileSystem()
String	identifier()	The value that uniquely identifies the item locally in its AItem.parent() directory.
<C extends Consumer<? super AFile.Observer>> C	iterateObservers(C logic)
String	name()	A simple String representing the "name" of the file.
ADirectory	parent()	The directory (identifying container) in which this item is located and in which no other item can have the same AItem.identifier() as this item.
boolean	registerObserver(AFile.Observer observer)
boolean	removeObserver(AFile.Observer observer)
String	type()	An optional String defining the type of the file's content.
U	user()

Methods inherited from class one.microstream.afs.AItem.Base

toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface one.microstream.afs.AFile

defaultUser, ensureExists, isEmpty, isUsed, size, toPath, toPathString, tryUseReading, tryUseReading, tryUseWriting, tryUseWriting, useReading, useReading, useWriting, useWriting

Constructor Details

Abstract

public Abstract()

Method Details

user

public U user()

Specified by:

user in interface AItem.Wrapper

actual

public AFile actual()

Specified by:

actual in interface AFile.Wrapper

Specified by:

actual in interface AItem.Wrapper

fileSystem

public AFileSystem fileSystem()

Specified by:

fileSystem in interface AItem

registerObserver

public boolean registerObserver(AFile.Observer observer)

Specified by:

registerObserver in interface AFile

removeObserver

public boolean removeObserver(AFile.Observer observer)

Specified by:

removeObserver in interface AFile

iterateObservers

public <C extends Consumer<? super AFile.Observer>> C iterateObservers(C logic)

Specified by:

iterateObservers in interface AFile

parent

public ADirectory parent()

Description copied from interface: AItem

The directory (identifying container) in which this item is located and in which no other item can have the same AItem.identifier() as this item.

Specified by:

parent in interface AItem

Returns:

the item's parent directory.

See Also:

AItem.identifier(), AItem.toPathString()

identifier

public String identifier()

Description copied from interface: AItem

The value that uniquely identifies the item locally in its AItem.parent() directory.

Note that this value might be a combination of #name() and #type(), but such a relation is not mandatory.

Specified by:

identifier in interface AItem

Returns:

the item's locally unique identifier.

See Also:

AItem.parent(), AItem.toPathString(), #name(), #type()

name

public String name()

Description copied from interface: AFile

A simple String representing the "name" of the file. While no two files can have the same AItem.identifier()inside a given directory, any number of files can have the same name.

Depending on the file system implementation, AFile.name() might be the same value as AItem.identifier(), but while AItem.identifier() is guaranteed to be a unique local identifier for any file system,AFile.name() is not.

Specified by:

name in interface AFile

Returns:

the file's name.

See Also:

AFile.toPathString(), AItem.identifier(), AFile.type()

type

public String type()

Description copied from interface: AFile

An optional String defining the type of the file's content.

If such an information makes no sense for a certain file system, this value may be null.

Specified by:

type in interface AFile

Returns:

the file's type.

exists

public boolean exists()

Description copied from interface: AItem

Queries whether the item represented by this instance actually physically exists on the underlying storage layer.

Specified by:

exists in interface AFile

Specified by:

exists in interface AItem

Returns:

whether the item exists.