PosixFilePermissions

public final class PosixFilePermissions extends Object

This class consists exclusively of static methods that operate on sets of PosixFilePermission objects.

Public Method Summary

static FileAttribute<Set<PosixFilePermission>>	asFileAttribute(Set<PosixFilePermission> perms) Creates a FileAttribute, encapsulating a copy of the given file permissions, suitable for passing to the createFile or createDirectory methods.
static Set<PosixFilePermission>	fromString(String perms) Returns the set of permissions corresponding to a given String representation.
static String	toString(Set<PosixFilePermission> perms) Returns the String representation of a set of permissions.

Inherited Method Summary

From class java.lang.Object

Object	clone() Creates and returns a copy of this Object.
boolean	equals(Object obj) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of Class that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait(long timeout, int nanos) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait(long timeout) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait() Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object.

Public Methods

public static FileAttribute<Set<PosixFilePermission>> asFileAttribute (Set<PosixFilePermission> perms)

Creates a FileAttribute, encapsulating a copy of the given file permissions, suitable for passing to the createFile or createDirectory methods.

Parameters

perms	the set of permissions

Returns

• an attribute encapsulating the given file permissions with name "posix:permissions"

Throws

ClassCastException	if the set contains elements that are not of type PosixFilePermission

public static Set<PosixFilePermission> fromString (String perms)

Returns the set of permissions corresponding to a given String representation.

The perms parameter is a String representing the permissions. It has 9 characters that are interpreted as three sets of three. The first set refers to the owner's permissions; the next to the group permissions and the last to others. Within each set, the first character is 'r' to indicate permission to read, the second character is 'w' to indicate permission to write, and the third character is 'x' for execute permission. Where a permission is not set then the corresponding character is set to '-'.

Usage Example: Suppose we require the set of permissions that indicate the owner has read, write, and execute permissions, the group has read and execute permissions and others have none.

   Set<PosixFilePermission> perms = PosixFilePermissions.fromString("rwxr-x---");
 

Parameters

perms	string representing a set of permissions

Returns

• the resulting set of permissions

Throws

IllegalArgumentException	if the string cannot be converted to a set of permissions

See Also

• toString(Set)

public static String toString (Set<PosixFilePermission> perms)

Returns the String representation of a set of permissions. It is guaranteed that the returned String can be parsed by the fromString(String) method.

If the set contains null or elements that are not of type PosixFilePermission then these elements are ignored.

Parameters

perms	the set of permissions

Returns

• the string representation of the permission set