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:
Name Type readonly Booleanhidden Booleansystem Booleanarchive 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.
Public Method Summary
| abstract String |
name()
Returns the name of the attribute view.
|
| abstract DosFileAttributes |
readAttributes()
Reads the basic file attributes as a bulk operation.
|
| abstract void |
setArchive(boolean value)
Updates the value of the archive attribute.
|
| abstract void |
setHidden(boolean value)
Updates the value of the hidden attribute.
|
| abstract void |
setReadOnly(boolean value)
Updates the value of the read-only attribute.
|
| abstract void |
setSystem(boolean value)
Updates the value of the system attribute.
|
Inherited Method Summary
Public Methods
public abstract String name ()
Returns the name of the attribute view. Attribute views of this type
have the name "dos".
Returns
- the name of the attribute view
public abstract DosFileAttributes readAttributes ()
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.
Returns
- the file attributes
Throws
| IOException | |
|---|---|
| SecurityException |
public abstract void setArchive (boolean value)
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
|
public abstract void setHidden (boolean value)
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
|
public abstract void setReadOnly (boolean value)
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
|
public abstract void setSystem (boolean value)
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
|