AclEntry (Java SE 9 & JDK 9 )
Keywords: java.nio.file.attribute.AclEntry class

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

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class | Description
    --- | --- | ---
    `static class` | `AclEntry.Builder` | A builder of `AclEntry` objects.

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `boolean` | `equals​(Object ob)` | Compares the specified object with this ACL entry for equality.
    `Set<AclEntryFlag>` | `flags​()` | Returns a copy of the flags component.
    `int` | `hashCode​()` | Returns the hash-code value for this ACL entry.
    `static AclEntry.Builder` | `newBuilder​()` | Constructs a new builder.
    `static AclEntry.Builder` | `newBuilder​(AclEntry entry)` | Constructs a new builder with the components of an existing ACL entry.
    `Set<AclEntryPermission>` | `permissions​()` | Returns a copy of the permissions component.
    `UserPrincipal` | `principal​()` | Returns the principal component.
    `String` | `toString​()` | Returns the string representation of this ACL entry.
    `AclEntryType` | `type​()` | Returns the ACL entry type.

    - ### Methods inherited from class java.lang.Object

      `clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

- - ### Method Detail

    - #### 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