OFObject Class Reference

The root class for all other classes inside ObjFW. More...

#include <ObjFW/OFObject.h>

Inheritance diagram for OFObject:

Instance Methods
(instancetype)	- init
	Initializes an already allocated object.
(nullable OFMethodSignature *)	- methodSignatureForSelector:
	Returns the method signature for the specified selector.
(void)	- dealloc
	Deallocates the object.
(void)	- performSelector:afterDelay:
	Performs the specified selector after the specified delay.
(void)	- performSelector:withObject:afterDelay:
	Performs the specified selector with the specified object after the specified delay.
(void)	- performSelector:withObject:withObject:afterDelay:
	Performs the specified selector with the specified objects after the specified delay.
(void)	- performSelector:withObject:withObject:withObject:afterDelay:
	Performs the specified selector with the specified objects after the specified delay.
(void)	- performSelector:withObject:withObject:withObject:withObject:afterDelay:
	Performs the specified selector with the specified objects after the specified delay.
(void)	- performSelector:onThread:waitUntilDone:
	Performs the specified selector on the specified thread.
(void)	- performSelector:onThread:withObject:waitUntilDone:
	Performs the specified selector on the specified thread with the specified object.
(void)	- performSelector:onThread:withObject:withObject:waitUntilDone:
	Performs the specified selector on the specified thread with the specified objects.
(void)	- performSelector:onThread:withObject:withObject:withObject:waitUntilDone:
	Performs the specified selector on the specified thread with the specified objects.
(void)	- performSelector:onThread:withObject:withObject:withObject:withObject:waitUntilDone:
	Performs the specified selector on the specified thread with the specified objects.
(void)	- performSelectorOnMainThread:waitUntilDone:
	Performs the specified selector on the main thread.
(void)	- performSelectorOnMainThread:withObject:waitUntilDone:
	Performs the specified selector on the main thread with the specified object.
(void)	- performSelectorOnMainThread:withObject:withObject:waitUntilDone:
	Performs the specified selector on the main thread with the specified objects.
(void)	- performSelectorOnMainThread:withObject:withObject:withObject:waitUntilDone:
	Performs the specified selector on the main thread with the specified objects.
(void)	- performSelectorOnMainThread:withObject:withObject:withObject:withObject:waitUntilDone:
	Performs the specified selector on the main thread with the specified objects.
(void)	- performSelector:onThread:afterDelay:
	Performs the specified selector on the specified thread after the specified delay.
(void)	- performSelector:onThread:withObject:afterDelay:
	Performs the specified selector on the specified thread with the specified object after the specified delay.
(void)	- performSelector:onThread:withObject:withObject:afterDelay:
	Performs the specified selector on the specified thread with the specified objects after the specified delay.
(void)	- performSelector:onThread:withObject:withObject:withObject:afterDelay:
	Performs the specified selector on the specified thread with the specified objects after the specified delay.
(void)	- performSelector:onThread:withObject:withObject:withObject:withObject:afterDelay:
	Performs the specified selector on the specified thread with the specified objects after the specified delay.
(nullable id)	- forwardingTargetForSelector:
	This method is called when resolveClassMethod: or resolveInstanceMethod: returned false. It should return a target to which the message should be forwarded.
(void)	- doesNotRecognizeSelector:
	Handles messages which are not understood by the receiver.
Instance Methods inherited from <OFObject>
(unsigned long)	- hash
	Returns a hash for the object.
(unsigned int)	- retainCount
	Returns the retain count.
(bool)	- isProxy
	Returns whether the object is a proxy object.
(bool)	- isKindOfClass:
	Returns a boolean whether the object is of the specified kind.
(bool)	- isMemberOfClass:
	Returns a boolean whether the object is a member of the specified class.
(bool)	- respondsToSelector:
	Returns a boolean whether the object responds to the specified selector.
(nullable IMP)	- methodForSelector:
	Returns the implementation for the specified selector.
(nullable id)	- performSelector:
	Performs the specified selector.
(nullable id)	- performSelector:withObject:
	Performs the specified selector with the specified object.
(nullable id)	- performSelector:withObject:withObject:
	Performs the specified selector with the specified objects.
(nullable id)	- performSelector:withObject:withObject:withObject:
	Performs the specified selector with the specified objects.
(nullable id)	- performSelector:withObject:withObject:withObject:withObject:
	Performs the specified selector with the specified objects.
(bool)	- isEqual:
	Checks two objects for equality.
(instancetype)	- retain
	Increases the retain count.
(void)	- release
	Decreases the retain count.
(instancetype)	- autorelease
	Adds the object to the topmost autorelease pool of the thread's autorelease pool stack.
(instancetype)	- self
	Returns the receiver.
(bool)	- allowsWeakReference
	Returns whether the object allows a weak reference.
(bool)	- retainWeakReference
	Retain a weak reference to this object.

Class Methods
(void)	+ load
	A method which is called once when the class is loaded into the runtime.
(void)	+ unload
	A method which is called when the class is unloaded from the runtime.
(void)	+ initialize
	A method which is called the moment before the first call to the class is being made.
(instancetype)	+ alloc
	Allocates memory for an instance of the class and sets up the memory pool for the object.
(Class)	+ class
	Returns the class.
(OFString *)	+ className
	Returns the name of the class as a string.
(bool)	+ isSubclassOfClass:
	Returns a boolean whether the class is a subclass of the specified class.
(nullable Class)	+ superclass
	Returns the superclass of the class.
(bool)	+ instancesRespondToSelector:
	Checks whether instances of the class respond to a given selector.
(bool)	+ conformsToProtocol:
	Checks whether the class conforms to a given protocol.
(nullable IMP)	+ instanceMethodForSelector:
	Returns the implementation of the instance method for the specified selector.
(nullable OFMethodSignature *)	+ instanceMethodSignatureForSelector:
	Returns the method signature of the instance method for the specified selector.
(OFString *)	+ description
	Returns a description for the class, which is usually the class name.
(nullable IMP)	+ replaceClassMethod:withMethodFromClass:
	Replaces a class method with a class method from another class.
(nullable IMP)	+ replaceInstanceMethod:withMethodFromClass:
	Replaces an instance method with an instance method from another class.
(void)	+ inheritMethodsFromClass:
	Adds all methods from the specified class to the class that is the receiver.
(bool)	+ resolveClassMethod:
	Try to resolve the specified class method.
(bool)	+ resolveInstanceMethod:
	Try to resolve the specified instance method.
(id)	+ copy
	Returns the class.

Properties
OFString *	className
	The name of the object's class.
OFString *	description
	A description for the object.

Detailed Description

The root class for all other classes inside ObjFW.

Method Documentation

alloc

+ (instancetype) alloc

Allocates memory for an instance of the class and sets up the memory pool for the object.

This method will never return nil.

Returns

The allocated object

Exceptions

OFAllocFailedException	There was not enough memory to allocate the object
OFInitializationFailedException	The instance could not be constructed

class

+ (Class) class

Returns the class.

Returns

The class

Reimplemented from <OFObject>.

className

+ (OFString *) className

Returns the name of the class as a string.

Returns

The name of the class as a string

conformsToProtocol:

+ (bool) conformsToProtocol:

(Protocol *)

protocol

Checks whether the class conforms to a given protocol.

Parameters

protocol

The protocol which should be checked for conformance

Returns

A boolean whether the class conforms to the specified protocol

Reimplemented from <OFObject>.

copy

+ (id) copy

Returns the class.

This method exists so that classes can be used in collections requiring conformance to the OFCopying protocol.

Returns

The class of the object

dealloc

- (void) dealloc

Deallocates the object.

It is automatically called when the retain count reaches zero.

This also frees all memory in its memory pool.

description

+ (OFString *) description

Returns a description for the class, which is usually the class name.

This is mostly for debugging purposes.

Returns

A description for the class, which is usually the class name

Reimplemented in OFAllocFailedException, and OFException.

doesNotRecognizeSelector:

- (void) doesNotRecognizeSelector:

(SEL)

selector

Handles messages which are not understood by the receiver.

Warning

If you override this method, you must make sure that it never returns!

Parameters

selector

The selector not understood by the receiver

Exceptions

OFNotImplementedException

forwardingTargetForSelector:

- (id) forwardingTargetForSelector:

(SEL)

selector

This method is called when resolveClassMethod: or resolveInstanceMethod: returned false. It should return a target to which the message should be forwarded.

Note

When the message should not be forwarded, you should not return nil, but instead return the result of [super forwardingTargetForSelector: selector].

Returns

The target to forward the message to

inheritMethodsFromClass:

+ (void) inheritMethodsFromClass:

(Class)

class_

Adds all methods from the specified class to the class that is the receiver.

Methods implemented by the receiving class itself will not be overridden, however methods implemented by its superclass will. Therefore it behaves similar as if the specified class is the superclass of the receiver.

All methods from the superclasses of the specified class will also be added.

If the specified class is a superclass of the receiving class, nothing is done.

The methods which will be added from the specified class are not allowed to use super or access instance variables, instead they have to use accessors.

Parameters

class_

The class from which the instance methods should be inherited

init

- (instancetype) init

Initializes an already allocated object.

Derived classes may override this, but need to use the following pattern:

self = [super init];
 
@try {
        // Custom initialization code goes here.
} @catch (id e) {
        [self release];
        @throw e;
}
 
return self;

With ARC enabled, the following pattern needs to be used instead:

self = [super init];
 
// Custom initialization code goes here.
 
return self;

init may never return nil, instead an exception (for example OFInitializationFailedException) should be thrown.

Returns

An initialized object

Reimplemented in OFArray, OFData, OFDictionary, OFDNSResolver, OFLocale, OFMutableArray, OFMutableDictionary, OFMutableSet, OFSet, OFString, and OFUUID.

initialize

+ (void) initialize

A method which is called the moment before the first call to the class is being made.

Derived classes can override this to execute their own code on initialization. They should make sure to not execute any code if self is not the class itself, as it might happen that the method was called for a subclass which did not override this method.

instanceMethodForSelector:

+ (IMP) instanceMethodForSelector:

(SEL)

selector

Returns the implementation of the instance method for the specified selector.

Parameters

selector

The selector for which the method should be returned

Returns

The implementation of the instance method for the specified selector or nil if it isn't implemented

instanceMethodSignatureForSelector:

+ (OFMethodSignature *) instanceMethodSignatureForSelector:

(SEL)

selector

Returns the method signature of the instance method for the specified selector.

Parameters

selector

The selector for which the method signature should be returned

Returns

The method signature of the instance method for the specified selector

instancesRespondToSelector:

+ (bool) instancesRespondToSelector:

(SEL)

selector

Checks whether instances of the class respond to a given selector.

Parameters

selector

The selector which should be checked for respondence

Returns

A boolean whether instances of the class respond to the specified selector

isSubclassOfClass:

+ (bool) isSubclassOfClass:

(Class)

class_

Returns a boolean whether the class is a subclass of the specified class.

Parameters

class_

The class which is checked for being a superclass

Returns

A boolean whether the class is a subclass of the specified class

load

+ (void) load

A method which is called once when the class is loaded into the runtime.

Derived classes can override this to execute their own code when the class is loaded.

methodSignatureForSelector:

- (OFMethodSignature *) methodSignatureForSelector:

(SEL)

selector

Returns the method signature for the specified selector.

Parameters

selector

The selector for which the method signature should be returned

Returns

The method signature for the specified selector

performSelector:afterDelay:

- (void) performSelector:		(SEL)	selector
afterDelay:		(OFTimeInterval)	delay

Performs the specified selector after the specified delay.

Parameters

selector	The selector to perform
delay	The delay after which the selector will be performed

performSelector:onThread:afterDelay:

- (void) performSelector:		(SEL)	selector
onThread:		(OFThread *)	thread
afterDelay:		(OFTimeInterval)	delay

Performs the specified selector on the specified thread after the specified delay.

Parameters

selector	The selector to perform
thread	The thread on which to perform the selector
delay	The delay after which the selector will be performed

performSelector:onThread:waitUntilDone:

- (void) performSelector:		(SEL)	selector
onThread:		(OFThread *)	thread
waitUntilDone:		(bool)	waitUntilDone

Performs the specified selector on the specified thread.

Parameters

selector	The selector to perform
thread	The thread on which to perform the selector
waitUntilDone	Whether to wait until the perform finished

performSelector:onThread:withObject:afterDelay:

- (void) performSelector:		(SEL)	selector
onThread:		(OFThread *)	thread
withObject:		(nullable id)	object
afterDelay:		(OFTimeInterval)	delay

Performs the specified selector on the specified thread with the specified object after the specified delay.

Parameters

selector	The selector to perform
thread	The thread on which to perform the selector
object	The object that is passed to the method specified by the selector
delay	The delay after which the selector will be performed

performSelector:onThread:withObject:waitUntilDone:

- (void) performSelector:		(SEL)	selector
onThread:		(OFThread *)	thread
withObject:		(nullable id)	object
waitUntilDone:		(bool)	waitUntilDone

Performs the specified selector on the specified thread with the specified object.

Parameters

selector	The selector to perform
thread	The thread on which to perform the selector
object	The object that is passed to the method specified by the selector
waitUntilDone	Whether to wait until the perform finished

performSelector:onThread:withObject:withObject:afterDelay:

- (void) performSelector:		(SEL)	selector
onThread:		(OFThread *)	thread
withObject:		(nullable id)	object1
withObject:		(nullable id)	object2
afterDelay:		(OFTimeInterval)	delay

Performs the specified selector on the specified thread with the specified objects after the specified delay.

Parameters

selector	The selector to perform
thread	The thread on which to perform the selector
object1	The first object that is passed to the method specified by the selector
object2	The second object that is passed to the method specified by the selector
delay	The delay after which the selector will be performed

performSelector:onThread:withObject:withObject:waitUntilDone:

- (void) performSelector:		(SEL)	selector
onThread:		(OFThread *)	thread
withObject:		(nullable id)	object1
withObject:		(nullable id)	object2
waitUntilDone:		(bool)	waitUntilDone

Performs the specified selector on the specified thread with the specified objects.

Parameters

selector	The selector to perform
thread	The thread on which to perform the selector
object1	The first object that is passed to the method specified by the selector
object2	The second object that is passed to the method specified by the selector
waitUntilDone	Whether to wait until the perform finished

performSelector:onThread:withObject:withObject:withObject:afterDelay:

- (void) performSelector:		(SEL)	selector
onThread:		(OFThread *)	thread
withObject:		(nullable id)	object1
withObject:		(nullable id)	object2
withObject:		(nullable id)	object3
afterDelay:		(OFTimeInterval)	delay

Performs the specified selector on the specified thread with the specified objects after the specified delay.

Parameters

selector	The selector to perform
thread	The thread on which to perform the selector
object1	The first object that is passed to the method specified by the selector
object2	The second object that is passed to the method specified by the selector
object3	The third object that is passed to the method specified by the selector
delay	The delay after which the selector will be performed

performSelector:onThread:withObject:withObject:withObject:waitUntilDone:

- (void) performSelector:		(SEL)	selector
onThread:		(OFThread *)	thread
withObject:		(nullable id)	object1
withObject:		(nullable id)	object2
withObject:		(nullable id)	object3
waitUntilDone:		(bool)	waitUntilDone

Performs the specified selector on the specified thread with the specified objects.

Parameters

selector	The selector to perform
thread	The thread on which to perform the selector
object1	The first object that is passed to the method specified by the selector
object2	The second object that is passed to the method specified by the selector
object3	The third object that is passed to the method specified by the selector
waitUntilDone	Whether to wait until the perform finished

performSelector:onThread:withObject:withObject:withObject:withObject:afterDelay:

- (void) performSelector:		(SEL)	selector
onThread:		(OFThread *)	thread
withObject:		(nullable id)	object1
withObject:		(nullable id)	object2
withObject:		(nullable id)	object3
withObject:		(nullable id)	object4
afterDelay:		(OFTimeInterval)	delay

Performs the specified selector on the specified thread with the specified objects after the specified delay.

Parameters

selector	The selector to perform
thread	The thread on which to perform the selector
object1	The first object that is passed to the method specified by the selector
object2	The second object that is passed to the method specified by the selector
object3	The third object that is passed to the method specified by the selector
object4	The fourth object that is passed to the method specified by the selector
delay	The delay after which the selector will be performed

performSelector:onThread:withObject:withObject:withObject:withObject:waitUntilDone:

- (void) performSelector:		(SEL)	selector
onThread:		(OFThread *)	thread
withObject:		(nullable id)	object1
withObject:		(nullable id)	object2
withObject:		(nullable id)	object3
withObject:		(nullable id)	object4
waitUntilDone:		(bool)	waitUntilDone

Performs the specified selector on the specified thread with the specified objects.

Parameters

selector	The selector to perform
thread	The thread on which to perform the selector
object1	The first object that is passed to the method specified by the selector
object2	The second object that is passed to the method specified by the selector
object3	The third object that is passed to the method specified by the selector
object4	The fourth object that is passed to the method specified by the selector
waitUntilDone	Whether to wait until the perform finished

performSelector:withObject:afterDelay:

- (void) performSelector:		(SEL)	selector
withObject:		(nullable id)	object
afterDelay:		(OFTimeInterval)	delay

Performs the specified selector with the specified object after the specified delay.

Parameters

selector	The selector to perform
object	The object that is passed to the method specified by the selector
delay	The delay after which the selector will be performed

performSelector:withObject:withObject:afterDelay:

- (void) performSelector:		(SEL)	selector
withObject:		(nullable id)	object1
withObject:		(nullable id)	object2
afterDelay:		(OFTimeInterval)	delay

Performs the specified selector with the specified objects after the specified delay.

Parameters

selector	The selector to perform
object1	The first object that is passed to the method specified by the selector
object2	The second object that is passed to the method specified by the selector
delay	The delay after which the selector will be performed

performSelector:withObject:withObject:withObject:afterDelay:

- (void) performSelector:		(SEL)	selector
withObject:		(nullable id)	object1
withObject:		(nullable id)	object2
withObject:		(nullable id)	object3
afterDelay:		(OFTimeInterval)	delay

Performs the specified selector with the specified objects after the specified delay.

Parameters

selector	The selector to perform
object1	The first object that is passed to the method specified by the selector
object2	The second object that is passed to the method specified by the selector
object3	The third object that is passed to the method specified by the selector
delay	The delay after which the selector will be performed

performSelector:withObject:withObject:withObject:withObject:afterDelay:

- (void) performSelector:		(SEL)	selector
withObject:		(nullable id)	object1
withObject:		(nullable id)	object2
withObject:		(nullable id)	object3
withObject:		(nullable id)	object4
afterDelay:		(OFTimeInterval)	delay

Performs the specified selector with the specified objects after the specified delay.

Parameters

selector	The selector to perform
object1	The first object that is passed to the method specified by the selector
object2	The second object that is passed to the method specified by the selector
object3	The third object that is passed to the method specified by the selector
object4	The fourth object that is passed to the method specified by the selector
delay	The delay after which the selector will be performed

performSelectorOnMainThread:waitUntilDone:

- (void) performSelectorOnMainThread:		(SEL)	selector
waitUntilDone:		(bool)	waitUntilDone

Performs the specified selector on the main thread.

Parameters

selector	The selector to perform
waitUntilDone	Whether to wait until the perform finished

performSelectorOnMainThread:withObject:waitUntilDone:

- (void) performSelectorOnMainThread:		(SEL)	selector
withObject:		(nullable id)	object
waitUntilDone:		(bool)	waitUntilDone

Performs the specified selector on the main thread with the specified object.

Parameters

selector	The selector to perform
object	The object that is passed to the method specified by the selector
waitUntilDone	Whether to wait until the perform finished

performSelectorOnMainThread:withObject:withObject:waitUntilDone:

- (void) performSelectorOnMainThread:		(SEL)	selector
withObject:		(nullable id)	object1
withObject:		(nullable id)	object2
waitUntilDone:		(bool)	waitUntilDone

Performs the specified selector on the main thread with the specified objects.

Parameters

selector	The selector to perform
object1	The first object that is passed to the method specified by the selector
object2	The second object that is passed to the method specified by the selector
waitUntilDone	Whether to wait until the perform finished

performSelectorOnMainThread:withObject:withObject:withObject:waitUntilDone:

- (void) performSelectorOnMainThread:		(SEL)	selector
withObject:		(nullable id)	object1
withObject:		(nullable id)	object2
withObject:		(nullable id)	object3
waitUntilDone:		(bool)	waitUntilDone

Performs the specified selector on the main thread with the specified objects.

Parameters

selector	The selector to perform
object1	The first object that is passed to the method specified by the selector
object2	The second object that is passed to the method specified by the selector
object3	The third object that is passed to the method specified by the selector
waitUntilDone	Whether to wait until the perform finished

performSelectorOnMainThread:withObject:withObject:withObject:withObject:waitUntilDone:

- (void) performSelectorOnMainThread:		(SEL)	selector
withObject:		(nullable id)	object1
withObject:		(nullable id)	object2
withObject:		(nullable id)	object3
withObject:		(nullable id)	object4
waitUntilDone:		(bool)	waitUntilDone

Performs the specified selector on the main thread with the specified objects.

Parameters

selector	The selector to perform
object1	The first object that is passed to the method specified by the selector
object2	The second object that is passed to the method specified by the selector
object3	The third object that is passed to the method specified by the selector
object4	The fourth object that is passed to the method specified by the selector
waitUntilDone	Whether to wait until the perform finished

replaceClassMethod:withMethodFromClass:

+ (IMP) replaceClassMethod:		(SEL)	selector
withMethodFromClass:		(Class)	class_

Replaces a class method with a class method from another class.

Parameters

selector	The selector of the class method to replace
class_	The class from which the new class method should be taken

Returns

The old implementation

replaceInstanceMethod:withMethodFromClass:

+ (IMP) replaceInstanceMethod:		(SEL)	selector
withMethodFromClass:		(Class)	class_

Replaces an instance method with an instance method from another class.

Parameters

selector	The selector of the instance method to replace
class_	The class from which the new instance method should be taken

Returns

The old implementation

resolveClassMethod:

+ (bool) resolveClassMethod:

(SEL)

selector

Try to resolve the specified class method.

This method is called if a class method was not found, so that an implementation can be provided at runtime.

Returns

Whether the method has been added to the class

resolveInstanceMethod:

+ (bool) resolveInstanceMethod:

(SEL)

selector

Try to resolve the specified instance method.

This method is called if an instance method was not found, so that an implementation can be provided at runtime.

Returns

Whether the method has been added to the class

superclass

+ (nullable Class) superclass

Returns the superclass of the class.

Returns

The superclass of the class

Reimplemented from <OFObject>.

unload

+ (void) unload

A method which is called when the class is unloaded from the runtime.

Derived classes can override this to execute their own code when the class is unloaded.

Warning

This is not supported by the Apple runtime and currently only called by the ObjFW runtime when objc_deinit has been called! In the future, this might also be called by the ObjFW runtime when the class is part of a plugin that is being unloaded.

Property Documentation

description

- (OFString *) description

readnonatomicassign

A description for the object.

This is used when the object is used in a format string and for debugging purposes.

---

The documentation for this class was generated from the following files:

• src/OFObject.h
• src/OFObject.m