/*
* Copyright (c) 2008-2023 Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#import "macros.h"
@class OFString;
OF_ASSUME_NONNULL_BEGIN
/**
* @protocol OFKeyValueCoding OFKeyValueCoding.h ObjFW/OFKeyValueCoding.h
*
* @brief A protocol for Key Value Coding.
*
* Key Value Coding makes it possible to access properties dynamically using
* the interface described by this protocol.
*/
@protocol OFKeyValueCoding
/**
* @brief Returns the value for the specified key.
*
* @param key The key of the value to return
* @return The value for the specified key
* @throw OFUndefinedKeyException The specified key does not exist and
* @ref valueForUndefinedKey: was not overridden
*/
- (nullable id)valueForKey: (OFString *)key;
/**
* @brief Returns the value for the specified key path.
*
* @param keyPath The key path of the value to return
* @return The value for the specified key path
* @throw OFUndefinedKeyException The specified key does not exist and
* @ref valueForUndefinedKey: was not overridden
*/
- (nullable id)valueForKeyPath: (OFString *)keyPath;
/**
* @brief This is called by @ref valueForKey: if the specified key does not
* exist.
*
* By default, this throws an @ref OFUndefinedKeyException.
*
* @param key The undefined key of the value to return
* @return The value for the specified undefined key
* @throw OFUndefinedKeyException The specified key does not exist
*/
- (nullable id)valueForUndefinedKey: (OFString *)key;
/**
* @brief Set the value for the specified key.
*
* @param value The value for the specified key
* @param key The key of the value to set
* @throw OFUndefinedKeyException The specified key does not exist and
* @ref setValue:forUndefinedKey: was not
* overridden
*/
- (void)setValue: (nullable id)value forKey: (OFString *)key;
/**
* @brief Set the value for the specified key path.
*
* @param value The value for the specified key path
* @param keyPath The key path of the value to set
* @throw OFUndefinedKeyException The specified key does not exist and
* @ref setValue:forUndefinedKey: was not
* overridden
*/
- (void)setValue: (nullable id)value forKeyPath: (OFString *)keyPath;
/**
* @brief This is called by @ref setValue:forKey: if the specified key does not
* exist.
*
* By default, this throws an @ref OFUndefinedKeyException.
*
* @param value The value for the specified undefined key
* @param key The undefined key of the value to set
* @throw OFUndefinedKeyException The specified key does not exist
*/
- (void)setValue: (nullable id)value forUndefinedKey: (OFString *)key;
/**
* @brief This is called by @ref setValue:forKey: if the specified key is a
* scalar, but the value specified is `nil`.
*
* By default, this throws an @ref OFInvalidArgumentException.
*
* @param key The key for which the value `nil` was specified
*/
- (void)setNilValueForKey: (OFString *)key;
@end
OF_ASSUME_NONNULL_END