Module java.base
Package java.nio.file.attribute

Class AclEntry

java.lang.Object
java.nio.file.attribute.AclEntry
public final class AclEntry
extends Object
An entry in an access control list (ACL).

The ACL entry represented by this class is based on the ACL model specified in RFC 3530: Network File System (NFS) version 4 Protocol. Each entry has four components as follows:

  1. The type component determines if the entry grants or denies access.

  2. The principal component, sometimes called the "who" component, is a UserPrincipal corresponding to the identity that the entry grants or denies access

  3. The permissions component is a set of permissions

  4. The flags component is a set of flags to indicate how entries are inherited and propagated

ACL entries are created using an associated AclEntry.Builder object by invoking its build method.

ACL entries are immutable and are safe for use by multiple concurrent threads.

Since:
1.7

  • Method Details

    • newBuilder

      public static AclEntry.Builder newBuilder()
      Constructs a new builder. The initial value of the type and who components is null. The initial value of the permissions and flags components is the empty set.
      Returns:
      a new builder

    • newBuilder

      public static AclEntry.Builder newBuilder​(AclEntry entry)
      Constructs a new builder with the components of an existing ACL entry.
      Parameters:
      entry - an ACL entry
      Returns:
      a new builder

    • type

      public AclEntryType type()
      Returns the ACL entry type.
      Returns:
      the ACL entry type

    • principal

      public UserPrincipal principal()
      Returns the principal component.
      Returns:
      the principal component

    • permissions

      public Set<AclEntryPermission> permissions()
      Returns a copy of the permissions component.

      The returned set is a modifiable copy of the permissions.

      Returns:
      the permissions component

    • flags

      public Set<AclEntryFlag> flags()
      Returns a copy of the flags component.

      The returned set is a modifiable copy of the flags.

      Returns:
      the flags component

    • equals

      public boolean equals​(Object ob)
      Compares the specified object with this ACL entry for equality.

      If the given object is not an AclEntry then this method immediately returns false.

      For two ACL entries to be considered equals requires that they are both the same type, their who components are equal, their permissions components are equal, and their flags components are equal.

      This method satisfies the general contract of the Object.equals method.

      Overrides:
      equals in class Object
      Parameters:
      ob - the object to which this object is to be compared
      Returns:
      true if, and only if, the given object is an AclEntry that is identical to this AclEntry
      See Also:
      Object.hashCode(), HashMap

    • hashCode

      public int hashCode()
      Returns the hash-code value for this ACL entry.

      This method satisfies the general contract of the Object.hashCode() method.

      Overrides:
      hashCode in class Object
      Returns:
      a hash code value for this object.
      See Also:
      Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)

    • toString

      public String toString()
      Returns the string representation of this ACL entry.
      Overrides:
      toString in class Object
      Returns:
      the string representation of this entry