/*
* 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.
*/
#ifndef __STDC_LIMIT_MACROS
# define __STDC_LIMIT_MACROS
#endif
#ifndef __STDC_CONSTANT_MACROS
# define __STDC_CONSTANT_MACROS
#endif
#include <stdarg.h>
#import "OFObject.h"
#import "OFCollection.h"
#import "OFEnumerator.h"
#import "OFJSONRepresentation.h"
#import "OFMessagePackRepresentation.h"
OF_ASSUME_NONNULL_BEGIN
@class OFArray OF_GENERIC(ObjectType);
#ifdef OF_HAVE_BLOCKS
/**
* @brief A block for enumerating an OFDictionary.
*
* @param key The current key
* @param object The object for the current key
* @param stop A pointer to a variable that can be set to true to stop the
* enumeration.
*/
typedef void (^OFDictionaryEnumerationBlock)(id key, id object, bool *stop);
/**
* @brief A block for filtering an OFDictionary.
*
* @param key The key to inspect
* @param object The object for the key to inspect
* @return Whether the object should be in the filtered dictionary.
*/
typedef bool (^OFDictionaryFilterBlock)(id key, id object);
/**
* @brief A block for mapping keys to objects in an OFDictionary.
*
* @param key The key to map
* @param object The current object for the key
* @return The object to map the key to
*/
typedef id _Nonnull (^OFDictionaryMapBlock)(id key, id object);
#endif
/**
* @class OFDictionary OFDictionary.h ObjFW/OFDictionary.h
*
* @brief An abstract class for storing objects in a dictionary.
*
* Keys are copied and thus must conform to the OFCopying protocol.
*
* @note Fast enumeration on a dictionary enumerates through the keys of the
* dictionary.
*
* @note Subclasses must implement @ref objectForKey:, @ref count and
* @ref keyEnumerator.
*/
@interface OFDictionary OF_GENERIC(KeyType, ObjectType): OFObject <OFCopying,
OFMutableCopying, OFCollection, OFJSONRepresentation,
OFMessagePackRepresentation>
#if !defined(OF_HAVE_GENERICS) && !defined(DOXYGEN)
# define KeyType id
# define ObjectType id
#endif
/**
* @brief An array of all keys.
*/
@property (readonly, nonatomic) OFArray OF_GENERIC(KeyType) *allKeys;
/**
* @brief An array of all objects.
*/
@property (readonly, nonatomic) OFArray OF_GENERIC(ObjectType) *allObjects;
/**
* @brief Creates a new OFDictionary.
*
* @return A new autoreleased OFDictionary
*/
+ (instancetype)dictionary;
/**
* @brief Creates a new OFDictionary with the specified dictionary.
*
* @param dictionary An OFDictionary
* @return A new autoreleased OFDictionary
*/
+ (instancetype)dictionaryWithDictionary:
(OFDictionary OF_GENERIC(KeyType, ObjectType) *)dictionary;
/**
* @brief Creates a new OFDictionary with the specified key and object.
*
* @param key The key
* @param object The object
* @return A new autoreleased OFDictionary
*/
+ (instancetype)dictionaryWithObject: (ObjectType)object forKey: (KeyType)key;
/**
* @brief Creates a new OFDictionary with the specified keys and objects.
*
* @param keys An array of keys
* @param objects An array of objects
* @return A new autoreleased OFDictionary
*/
+ (instancetype)dictionaryWithObjects: (OFArray OF_GENERIC(ObjectType) *)objects
forKeys: (OFArray OF_GENERIC(KeyType) *)keys;
/**
* @brief Creates a new OFDictionary with the specified keys and objects.
*
* @param keys An array of keys
* @param objects An array of objects
* @param count The number of objects in the arrays
* @return A new autoreleased OFDictionary
*/
+ (instancetype)
dictionaryWithObjects: (ObjectType const _Nonnull *_Nonnull)objects
forKeys: (KeyType const _Nonnull *_Nonnull)keys
count: (size_t)count;
/**
* @brief Creates a new OFDictionary with the specified keys objects.
*
* @param firstKey The first key
* @return A new autoreleased OFDictionary
*/
+ (instancetype)dictionaryWithKeysAndObjects: (KeyType)firstKey, ...
OF_SENTINEL;
/**
* @brief Initializes an already allocated OFDictionary to be empty.
*
* @return An initialized OFDictionary
*/
- (instancetype)init OF_DESIGNATED_INITIALIZER;
/**
* @brief Initializes an already allocated OFDictionary with the specified
* OFDictionary.
*
* @param dictionary An OFDictionary
* @return An initialized OFDictionary
*/
- (instancetype)initWithDictionary:
(OFDictionary OF_GENERIC(KeyType, ObjectType) *)dictionary;
/**
* @brief Initializes an already allocated OFDictionary with the specified key
* and object.
*
* @param key The key
* @param object The object
* @return An initialized OFDictionary
*/
- (instancetype)initWithObject: (ObjectType)object forKey: (KeyType)key;
/**
* @brief Initializes an already allocated OFDictionary with the specified keys
* and objects.
*
* @param keys An array of keys
* @param objects An array of objects
* @return An initialized OFDictionary
*/
- (instancetype)initWithObjects: (OFArray OF_GENERIC(ObjectType) *)objects
forKeys: (OFArray OF_GENERIC(KeyType) *)keys;
/**
* @brief Initializes an already allocated OFDictionary with the specified keys
* and objects.
*
* @param keys An array of keys
* @param objects An array of objects
* @param count The number of objects in the arrays
* @return An initialized OFDictionary
*/
- (instancetype)initWithObjects: (ObjectType const _Nonnull *_Nonnull)objects
forKeys: (KeyType const _Nonnull *_Nonnull)keys
count: (size_t)count OF_DESIGNATED_INITIALIZER;
/**
* @brief Initializes an already allocated OFDictionary with the specified keys
* and objects.
*
* @param firstKey The first key
* @return An initialized OFDictionary
*/
- (instancetype)initWithKeysAndObjects: (KeyType)firstKey, ... OF_SENTINEL;
/**
* @brief Initializes an already allocated OFDictionary with the specified key
* and va_list.
*
* @param firstKey The first key
* @param arguments A va_list of the other arguments
* @return An initialized OFDictionary
*/
- (instancetype)initWithKey: (KeyType)firstKey arguments: (va_list)arguments;
/**
* @brief Returns the object for the given key or `nil` if the key was not
* found.
*
* @warning The returned object is *not* retained and autoreleased for
* performance reasons!
*
* @param key The key whose object should be returned
* @return The object for the given key or `nil` if the key was not found
*/
- (nullable ObjectType)objectForKey: (KeyType)key;
- (nullable ObjectType)objectForKeyedSubscript: (KeyType)key;
/**
* @brief Returns the value for the given key or `nil` if the key was not
* found.
*
* This is equivalent to @ref objectForKey:.
*
* The special key `@count` can be used to retrieve the count as an OFNumber.
*
* @param key The key whose value should be returned
* @return The value for the given key or `nil` if the key was not found
*/
- (nullable id)valueForKey: (OFString *)key;
/**
* @brief Sets a value for a key.
*
* This is equivalent to OFMutableDictionary#setObject:forKey:.
*
* @param key The key to set
* @param value The value to set the key to
* @throw OFUndefinedKeyException The dictionary is immutable
*/
- (void)setValue: (nullable id)value forKey: (OFString *)key;
/**
* @brief Checks whether the dictionary contains an object equal to the
* specified object.
*
* @param object The object which is checked for being in the dictionary
* @return A boolean whether the dictionary contains the specified object
*/
- (bool)containsObject: (ObjectType)object;
/**
* @brief Checks whether the dictionary contains an object with the specified
* address.
*
* @param object The object which is checked for being in the dictionary
* @return A boolean whether the dictionary contains an object with the
* specified address
*/
- (bool)containsObjectIdenticalTo: (ObjectType)object;
/**
* @brief Returns an OFEnumerator to enumerate through the dictionary's keys.
*
* @return An OFEnumerator to enumerate through the dictionary's keys
*/
- (OFEnumerator OF_GENERIC(KeyType) *)keyEnumerator;
/**
* @brief Returns an OFEnumerator to enumerate through the dictionary's objects.
*
* @return An OFEnumerator to enumerate through the dictionary's objects
*/
- (OFEnumerator OF_GENERIC(ObjectType) *)objectEnumerator;
#ifdef OF_HAVE_BLOCKS
/**
* @brief Executes a block for each key / object pair.
*
* @param block The block to execute for each key / object pair.
*/
- (void)enumerateKeysAndObjectsUsingBlock: (OFDictionaryEnumerationBlock)block;
/**
* @brief Creates a new dictionary, mapping each object using the specified
* block.
*
* @param block A block which maps an object for each object
* @return A new autoreleased OFDictionary
*/
- (OFDictionary OF_GENERIC(KeyType, id) *)
mappedDictionaryUsingBlock: (OFDictionaryMapBlock)block;
/**
* @brief Creates a new dictionary, only containing the objects for which the
* block returns true.
*
* @param block A block which determines if the object should be in the new
* dictionary
* @return A new autoreleased OFDictionary
*/
- (OFDictionary OF_GENERIC(KeyType, ObjectType) *)
filteredDictionaryUsingBlock: (OFDictionaryFilterBlock)block;
#endif
#if !defined(OF_HAVE_GENERICS) && !defined(DOXYGEN)
# undef KeyType
# undef ObjectType
#endif
@end
OF_ASSUME_NONNULL_END
#import "OFMutableDictionary.h"
#if !defined(NSINTEGER_DEFINED) && !__has_feature(modules)
/* Required for dictionary literals to work */
@compatibility_alias NSDictionary OFDictionary;
#endif