Struct CBGroupIdentity 

pub struct CBGroupIdentity { /* private fields */ }

Available on crate feature CBIdentity only.

An object of the CBGroupIdentity class represents a group identity and is used for viewing the attributes of group identities from an identity authority. The principal attributes of a CBGroupIdentity object are a POSIX group identifier (GID) and a list of members.

See also Apple’s documentation

Implementations

impl CBGroupIdentity

pub unsafe fn groupIdentityWithPosixGID_authority( gid: gid_t, authority: &CBIdentityAuthority, ) -> Option<Retained<CBGroupIdentity>>

Available on crate features CBIdentityAuthority and libc only.

Returns the group identity with the given POSIX GID in the specified identity authority.

• Parameters:
• gid: The GID of the group identity you are searching for.
• authority: An identity authority in which to search for the group identity.
• Returns: The group identity object with the given GID in the specified identity authority, or nil if no identity exists with the specified GID.

See Also

• Identity Services Programming Guide

pub unsafe fn posixGID(&self) -> gid_t

Available on crate feature libc only.

Returns the POSIX GID of the identity.

The POSIX GID is an integer that can identify a group within an identity authority. GIDs are not guaranteed to be unique within an identity authority.

• Returns: The POSIX GID of the group identity.

pub unsafe fn members(&self) -> Option<Retained<NSArray>>

👎Deprecated: Use the memberIdentities property instead.

Returns the members of the group.

This method only returns direct members of a group, it does not return members of members. Both user and group identities can be members of a group, but a group cannot be a member of itself. You also cannot have “circular” membership, i.e. a group be a member of another group that is a member of the first group.

• Returns: An array of CBIdentity objects each representing a member of the group identity.

pub unsafe fn memberIdentities(&self) -> Retained<NSArray<CBIdentity>>

impl CBGroupIdentity

Methods declared on superclass NSObject.

pub unsafe fn init(this: Allocated<Self>) -> Retained<Self>

pub unsafe fn new() -> Retained<Self>

Methods from Deref<Target = CBIdentity>

pub unsafe fn authority(&self) -> Retained<CBIdentityAuthority>

Available on crate feature CBIdentityAuthority only.

Returns the identity authority where the identity is stored.

• Returns: The identity authority where the identity is stored.

pub unsafe fn uniqueIdentifier(&self) -> Retained<NSUUID>

pub unsafe fn UUIDString(&self) -> Retained<NSString>

👎Deprecated: Use the uniqueIdentifier property instead.

Returns the UUID of the identity as a string.

The UUID string is generated so it is unique across all identity authorities. When storing ACLs, one method is to store the UUID of each identity. However, it is recommended that you use a persistent data object instead (see CBIdentity/persistentReference).

• Returns: The UUID string of the identity.

pub unsafe fn fullName(&self) -> Retained<NSString>

Returns the full name of the identity.

• Returns: The full name for the identity.

pub unsafe fn posixName(&self) -> Retained<NSString>

Returns the POSIX name of the identity.

The POSIX name is also referred to as the “short name” for an identity. It can only contain the characters A-Z, a-z, 0-9, -, _, ., and .

• Returns: The POSIX name of the identity.

pub unsafe fn aliases(&self) -> Retained<NSArray<NSString>>

Returns an array of aliases (alternate names) for the identity.

An identity can have zero or more aliases. Like the full and short names, two identities cannot share an alias.

• Returns: An array of NSString objects containing the alternate names for the identity.

pub unsafe fn emailAddress(&self) -> Option<Retained<NSString>>

Returns the email address of an identity.

• Returns: The email address of an identity or nil if none exists.

pub unsafe fn image(&self) -> Option<Retained<NSImage>>

Available on crate feature objc2-app-kit only.

Returns the image associated with an identity.

• Returns: The image associated with an identity, or nil if none exists.

pub unsafe fn persistentReference(&self) -> Option<Retained<NSData>>

Returns a persistent reference to store a reference to an identity.

A persistent reference data object is an object generated from an identity. Persistent data objects can be written to and read from a file, making them extremely useful for storing identities in an ACL.

• Returns: A data object that uniquely references an identity.

pub unsafe fn isHidden(&self) -> bool

Returns a Boolean value indicating the state of the identity’s hidden property.

A hidden identity does not show up in the Identity Picker. A hidden identity refers to system identities such as root, www, and wheel.

• Returns: <doc ://com.apple.documentation/documentation/objectivec/yes> if the identity is hidden; <doc ://com.apple.documentation/documentation/objectivec/no> if it is not.

pub unsafe fn isMemberOfGroup(&self, group: &CBGroupIdentity) -> bool

Returns a Boolean value indicating whether the identity is a member of the specified group.

• Parameters:

• group: The group to check for membership.

• Returns: <doc ://com.apple.documentation/documentation/objectivec/yes> if the identity is a member of the group; <doc ://com.apple.documentation/documentation/objectivec/no> if it is not.

pub unsafe fn CSIdentity(&self) -> Retained<CSIdentity>

Available on crate feature objc2-core-services only.

Returns an opaque object for use with the Core Services Identity API.

This method, along with CBIdentity/identityWithCSIdentity:, is used for interoperability with the Core Services Identity API.

• Returns: The opaque object for use with the Core Services Identity API.

Methods from Deref<Target = NSObject>

pub fn doesNotRecognizeSelector(&self, sel: Sel) -> !

Handle messages the object doesn’t recognize.

See Apple’s documentation for details.

Methods from Deref<Target = AnyObject>

pub fn class(&self) -> &'static AnyClass

Dynamically find the class of this object.

Panics

May panic if the object is invalid (which may be the case for objects returned from unavailable init/new methods).

Example

Check that an instance of NSObject has the precise class NSObject.

use objc2::ClassType;
use objc2::runtime::NSObject;

let obj = NSObject::new();
assert_eq!(obj.class(), NSObject::class());

pub unsafe fn get_ivar<T>(&self, name: &str) -> &T

where T: Encode,

👎Deprecated: this is difficult to use correctly, use Ivar::load instead.

Use Ivar::load instead.

Safety

The object must have an instance variable with the given name, and it must be of type T.

See Ivar::load_ptr for details surrounding this.

pub fn downcast_ref<T>(&self) -> Option<&T>

where T: DowncastTarget,

Attempt to downcast the object to a class of type T.

This is the reference-variant. Use Retained::downcast if you want to convert a retained object to another type.

Mutable classes

Some classes have immutable and mutable variants, such as NSString and NSMutableString.

When some Objective-C API signature says it gives you an immutable class, it generally expects you to not mutate that, even though it may technically be mutable “under the hood”.

So using this method to convert a NSString to a NSMutableString, while not unsound, is generally frowned upon unless you created the string yourself, or the API explicitly documents the string to be mutable.

See Apple’s documentation on mutability and on isKindOfClass: for more details.

Generic classes

Objective-C generics are called “lightweight generics”, and that’s because they aren’t exposed in the runtime. This makes it impossible to safely downcast to generic collections, so this is disallowed by this method.

You can, however, safely downcast to generic collections where all the type-parameters are AnyObject.

Panics

This works internally by calling isKindOfClass:. That means that the object must have the instance method of that name, and an exception will be thrown (if CoreFoundation is linked) or the process will abort if that is not the case. In the vast majority of cases, you don’t need to worry about this, since both root objects NSObject and NSProxy implement this method.

Examples

Cast an NSString back and forth from NSObject.

use objc2::rc::Retained;
use objc2_foundation::{NSObject, NSString};

let obj: Retained<NSObject> = NSString::new().into_super();
let string = obj.downcast_ref::<NSString>().unwrap();
// Or with `downcast`, if we do not need the object afterwards
let string = obj.downcast::<NSString>().unwrap();

Try (and fail) to cast an NSObject to an NSString.

use objc2_foundation::{NSObject, NSString};

let obj = NSObject::new();
assert!(obj.downcast_ref::<NSString>().is_none());

Try to cast to an array of strings.

use objc2_foundation::{NSArray, NSObject, NSString};

let arr = NSArray::from_retained_slice(&[NSObject::new()]);
// This is invalid and doesn't type check.
let arr = arr.downcast_ref::<NSArray<NSString>>();

This fails to compile, since it would require enumerating over the array to ensure that each element is of the desired type, which is a performance pitfall.

Downcast when processing each element instead.

use objc2_foundation::{NSArray, NSObject, NSString};

let arr = NSArray::from_retained_slice(&[NSObject::new()]);

for elem in arr {
    if let Some(data) = elem.downcast_ref::<NSString>() {
        // handle `data`
    }
}

Trait Implementations

impl AsRef<AnyObject> for CBGroupIdentity

fn as_ref(&self) -> &AnyObject

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<CBGroupIdentity> for CBGroupIdentity

fn as_ref(&self) -> &Self

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<CBIdentity> for CBGroupIdentity

fn as_ref(&self) -> &CBIdentity

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<NSObject> for CBGroupIdentity

fn as_ref(&self) -> &NSObject

Converts this type into a shared reference of the (usually inferred) input type.

impl Borrow<AnyObject> for CBGroupIdentity

fn borrow(&self) -> &AnyObject

Immutably borrows from an owned value.

impl Borrow<CBIdentity> for CBGroupIdentity

fn borrow(&self) -> &CBIdentity

Immutably borrows from an owned value.

impl Borrow<NSObject> for CBGroupIdentity

fn borrow(&self) -> &NSObject

Immutably borrows from an owned value.

impl ClassType for CBGroupIdentity

const NAME: &'static str = "CBGroupIdentity"

The name of the Objective-C class that this type represents.

type Super = CBIdentity

The superclass of this class.

type ThreadKind = <<CBGroupIdentity as ClassType>::Super as ClassType>::ThreadKind

Whether the type can be used from any thread, or from only the main thread.

fn class() -> &'static AnyClass

Get a reference to the Objective-C class that this type represents.

fn as_super(&self) -> &Self::Super

Get an immutable reference to the superclass.

impl CopyingHelper for CBGroupIdentity

type Result = CBGroupIdentity

The immutable counterpart of the type, or Self if the type has no immutable counterpart.

impl Debug for CBGroupIdentity

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Deref for CBGroupIdentity

type Target = CBIdentity

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Hash for CBGroupIdentity

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Message for CBGroupIdentity

fn retain(&self) -> Retained<Self>

where Self: Sized,

Increment the reference count of the receiver.

impl NSCoding for CBGroupIdentity

unsafe fn encodeWithCoder(&self, coder: &NSCoder)

where Self: Sized + Message,

Safety

unsafe fn initWithCoder( this: Allocated<Self>, coder: &NSCoder, ) -> Option<Retained<Self>>

where Self: Sized + Message,

Safety

impl NSCopying for CBGroupIdentity

fn copy(&self) -> Retained<Self::Result>

where Self: Sized + Message + CopyingHelper,

Returns a new instance that’s a copy of the receiver.

unsafe fn copyWithZone(&self, zone: *mut NSZone) -> Retained<Self::Result>

where Self: Sized + Message + CopyingHelper,

Returns a new instance that’s a copy of the receiver.

impl NSObjectProtocol for CBGroupIdentity

fn isEqual(&self, other: Option<&AnyObject>) -> bool

where Self: Sized + Message,

Check whether the object is equal to an arbitrary other object.

fn hash(&self) -> usize

where Self: Sized + Message,

An integer that can be used as a table address in a hash table structure.

fn isKindOfClass(&self, cls: &AnyClass) -> bool

where Self: Sized + Message,

Check if the object is an instance of the class, or one of its subclasses.

fn is_kind_of<T>(&self) -> bool

where T: ClassType, Self: Sized + Message,

👎Deprecated: use isKindOfClass directly, or cast your objects with AnyObject::downcast_ref

Check if the object is an instance of the class type, or one of its subclasses.

fn isMemberOfClass(&self, cls: &AnyClass) -> bool

where Self: Sized + Message,

Check if the object is an instance of a specific class, without checking subclasses.

fn respondsToSelector(&self, aSelector: Sel) -> bool

where Self: Sized + Message,

Check whether the object implements or inherits a method with the given selector.

fn conformsToProtocol(&self, aProtocol: &AnyProtocol) -> bool

where Self: Sized + Message,

Check whether the object conforms to a given protocol.

fn description(&self) -> Retained<NSObject>

where Self: Sized + Message,

A textual representation of the object.

fn debugDescription(&self) -> Retained<NSObject>

where Self: Sized + Message,

A textual representation of the object to use when debugging.

fn isProxy(&self) -> bool

where Self: Sized + Message,

Check whether the receiver is a subclass of the NSProxy root class instead of the usual NSObject.

fn retainCount(&self) -> usize

where Self: Sized + Message,

The reference count of the object.

impl PartialEq for CBGroupIdentity

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl RefEncode for CBGroupIdentity

const ENCODING_REF: Encoding = <CBIdentity as ::objc2::RefEncode>::ENCODING_REF

The Objective-C type-encoding for a reference of this type.

impl DowncastTarget for CBGroupIdentity

impl Eq for CBGroupIdentity