<OFKeyValueCoding> Protocol Reference

A protocol for Key Value Coding. More...

#include <ObjFW/ObjFW.h>

Instance Methods
(nullable id)	- valueForKey:
	Returns the value for the specified key.
(nullable id)	- valueForKeyPath:
	Returns the value for the specified key path.
(nullable id)	- valueForUndefinedKey:
	This is called by valueForKey: if the specified key does not exist.
(void)	- setValue:forKey:
	Set the value for the specified key.
(void)	- setValue:forKeyPath:
	Set the value for the specified key path.
(void)	- setValue:forUndefinedKey:
	This is called by setValue:forKey: if the specified key does not exist.
(void)	- setNilValueForKey:
	This is called by setValue:forKey: if the specified key is a scalar, but the value specified is nil.

Detailed Description

A protocol for Key Value Coding.

Key Value Coding makes it possible to access properties dynamically using the interface described by this protocol.

Method Documentation

setNilValueForKey:

- (void) setNilValueForKey:

(OFString *)

key

This is called by setValue:forKey: if the specified key is a scalar, but the value specified is nil.

By default, this throws an OFInvalidArgumentException.

Parameters

key	The key for which the value nil was specified

setValue:forKey:

- (void) setValue:		(nullable id)	value
forKey:		(OFString *)	key

Set the value for the specified key.

Parameters

value	The value for the specified key
key	The key of the value to set

Exceptions

OFUndefinedKeyException

The specified key does not exist and setValue:forUndefinedKey: was not overridden

setValue:forKeyPath:

- (void) setValue:		(nullable id)	value
forKeyPath:		(OFString *)	keyPath

Set the value for the specified key path.

Parameters

value	The value for the specified key path
keyPath	The key path of the value to set

Exceptions

OFUndefinedKeyException

The specified key does not exist and setValue:forUndefinedKey: was not overridden

setValue:forUndefinedKey:

- (void) setValue:		(nullable id)	value
forUndefinedKey:		(OFString *)	key

This is called by setValue:forKey: if the specified key does not exist.

By default, this throws an OFUndefinedKeyException.

Parameters

value	The value for the specified undefined key
key	The undefined key of the value to set

Exceptions

OFUndefinedKeyException

The specified key does not exist

valueForKey:

- (nullable id) valueForKey:

(OFString *)

key

Returns the value for the specified key.

Parameters

key	The key of the value to return

Returns

The value for the specified key

Exceptions

OFUndefinedKeyException

The specified key does not exist and valueForUndefinedKey: was not overridden

valueForKeyPath:

- (nullable id) valueForKeyPath:

(OFString *)

keyPath

Returns the value for the specified key path.

Parameters

keyPath

The key path of the value to return

Returns

The value for the specified key path

Exceptions

OFUndefinedKeyException

The specified key does not exist and valueForUndefinedKey: was not overridden

valueForUndefinedKey:

- (nullable id) valueForUndefinedKey:

(OFString *)

key

This is called by valueForKey: if the specified key does not exist.

By default, this throws an OFUndefinedKeyException.

Parameters

key	The undefined key of the value to return

Returns

The value for the specified undefined key

Exceptions

OFUndefinedKeyException

The specified key does not exist

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The documentation for this protocol was generated from the following file:

• src/OFKeyValueCoding.h