Module java.base

Package java.nio.file.attribute

Interface DosFileAttributeView

All Superinterfaces:

AttributeView, BasicFileAttributeView, FileAttributeView

public interface DosFileAttributeView
extends BasicFileAttributeView

A file attribute view that provides a view of the legacy "DOS" file attributes. These attributes are supported by file systems such as the File Allocation Table (FAT) format commonly used in consumer devices.

A DosFileAttributeView is a BasicFileAttributeView that additionally supports access to the set of DOS attribute flags that are used to indicate if the file is read-only, hidden, a system file, or archived.

Where dynamic access to file attributes is required, the attributes supported by this attribute view are as defined by BasicFileAttributeView, and in addition, the following attributes are supported:

Supported attributes

Name	Type
readonly	Boolean
hidden	Boolean
system	Boolean
archive	Boolean

The getAttribute method may be used to read any of these attributes, or any of the attributes defined by BasicFileAttributeView as if by invoking the readAttributes() method.

The setAttribute method may be used to update the file's last modified time, last access time or create time attributes as defined by BasicFileAttributeView. It may also be used to update the DOS attributes as if by invoking the setReadOnly, setHidden, setSystem, and setArchive methods respectively.

Since:

1.7

Method Summary

Modifier and Type	Method	Description
String	name()	Returns the name of the attribute view.
DosFileAttributes	readAttributes()	Reads the basic file attributes as a bulk operation.
void	setArchive(boolean value)	Updates the value of the archive attribute.
void	setHidden(boolean value)	Updates the value of the hidden attribute.
void	setReadOnly(boolean value)	Updates the value of the read-only attribute.
void	setSystem(boolean value)	Updates the value of the system attribute.

Methods declared in interface java.nio.file.attribute.BasicFileAttributeView

setTimes

Method Detail

name

String name()

Returns the name of the attribute view. Attribute views of this type have the name "dos".

Specified by:

name in interface AttributeView

Specified by:

name in interface BasicFileAttributeView

Returns:

the name of the attribute view

readAttributes

DosFileAttributes readAttributes()
                          throws IOException

Description copied from interface: BasicFileAttributeView

Reads the basic file attributes as a bulk operation.

It is implementation specific if all file attributes are read as an atomic operation with respect to other file system operations.

Specified by:

readAttributes in interface BasicFileAttributeView

Returns:

the file attributes

Throws:

IOException - if an I/O error occurs

SecurityException - In the case of the default provider, a security manager is installed, its checkRead method is invoked to check read access to the file

setReadOnly

void setReadOnly(boolean value)
          throws IOException

Updates the value of the read-only attribute.

It is implementation specific if the attribute can be updated as an atomic operation with respect to other file system operations. An implementation may, for example, require to read the existing value of the DOS attribute in order to update this attribute.

Parameters:

value - the new value of the attribute

Throws:

IOException - if an I/O error occurs

SecurityException - In the case of the default, and a security manager is installed, its checkWrite method is invoked to check write access to the file

setHidden

void setHidden(boolean value)
        throws IOException

Updates the value of the hidden attribute.

It is implementation specific if the attribute can be updated as an atomic operation with respect to other file system operations. An implementation may, for example, require to read the existing value of the DOS attribute in order to update this attribute.

Parameters:

value - the new value of the attribute

Throws:

IOException - if an I/O error occurs

SecurityException - In the case of the default, and a security manager is installed, its checkWrite method is invoked to check write access to the file

setSystem

void setSystem(boolean value)
        throws IOException

Updates the value of the system attribute.

It is implementation specific if the attribute can be updated as an atomic operation with respect to other file system operations. An implementation may, for example, require to read the existing value of the DOS attribute in order to update this attribute.

Parameters:

value - the new value of the attribute

Throws:

IOException - if an I/O error occurs

SecurityException - In the case of the default, and a security manager is installed, its checkWrite method is invoked to check write access to the file

setArchive

void setArchive(boolean value)
         throws IOException

Updates the value of the archive attribute.

It is implementation specific if the attribute can be updated as an atomic operation with respect to other file system operations. An implementation may, for example, require to read the existing value of the DOS attribute in order to update this attribute.

Parameters:

value - the new value of the attribute

Throws:

IOException - if an I/O error occurs

SecurityException - In the case of the default, and a security manager is installed, its checkWrite method is invoked to check write access to the file