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115 lines
4.4 KiB
Objective-C
115 lines
4.4 KiB
Objective-C
//
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// RKObjectMappingProvider.h
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// RestKit
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//
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// Created by Jeremy Ellison on 5/6/11.
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// Copyright 2011 Two Toasters. All rights reserved.
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//
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#import "RKObjectMapping.h"
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/**
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Responsible for providing object mappings to an instance of the object mapper
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by evaluating the current keyPath being operated on
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*/
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@interface RKObjectMappingProvider : NSObject {
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NSMutableArray* _objectMappings;
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NSMutableDictionary* _objectMappingsByKeyPath;
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NSMutableDictionary* _serializationMappings;
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}
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/**
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Set a mapping for a keypath that comes back in your payload
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@deprecated
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*/
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- (void)setMapping:(RKObjectMapping*)mapping forKeyPath:(NSString*)keyPath DEPRECATED_ATTRIBUTE;
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/**
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Configure an object mapping to handle data that appears at a particular keyPath in
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a payload loaded from a
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*/
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- (void)setObjectMapping:(RKObjectMapping*)mapping forKeyPath:(NSString*)keyPath;
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/**
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Returns the object mapping to use for mapping the specified keyPath into an object graph
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*/
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- (RKObjectMapping*)objectMappingForKeyPath:(NSString*)keyPath;
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/**
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Returns a dictionary where the keys are mappable keyPaths and the values are the object
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mapping to use for objects that appear at the keyPath.
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*/
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- (NSDictionary*)objectMappingsByKeyPath;
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/**
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Registers an object mapping as being rooted at a specific keyPath. The keyPath will be registered
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and an inverse mapping for the object will be generated and used for serialization.
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This is a shortcut for configuring a pair of object mappings that model a simple resource the same
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way when going to and from the server.
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For example, if we configure have a simple resource called 'person' that returns JSON in the following
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format:
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{ "person": { "first_name": "Blake", "last_name": "Watters } }
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We might configure a mapping like so:
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RKObjectMapping* mapping = [RKObjectMapping mappingForClass:[Person class]];
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[mapping mapAttributes:@"first_name", @"last_name", nil];
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If we want to parse the above JSON and serialize it such that using postObject: or putObject: use the same format,
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we can auto-generate the serialization mapping and set the whole thing up in one shot:
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[[RKObjectManager sharedManager].mappingProvider registerMapping:mapping withRootKeyPath:@"user"];
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This will call setMapping:forKeyPath: for you, then generate a serialization mapping and set the root
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keyPath as well.
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If you want to manipulate the serialization mapping yourself, you can work with the mapping directly:
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RKObjectMapping* serializationMappingForPerson = [personMapping inverseMapping];
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// NOTE: Serialization mapping default to a nil root keyPath and will serialize to a flat dictionary
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[[RKObjectManager sharedManager].mappingProvider setSerializationMapping:serializationMappingForPerson forClass:[Person class]];
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*/
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- (void)registerMapping:(RKObjectMapping*)objectMapping withRootKeyPath:(NSString*)keyPath;
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/**
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Adds an object mapping to the provider for later retrieval. The mapping is not bound to a particular keyPath and
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must be explicitly set on an instance of RKObjectLoader or RKObjectMappingOperation to be applied. This is useful
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in cases where the remote system does not namespace resources in a keyPath that can be used for disambiguation.
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You can retrieve mappings added to the provider by invoking objectMappingsForClass: and objectMappingForClass:
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@see objectMappingsForClass:
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@see objectMappingForClass:
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*/
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- (void)addObjectMapping:(RKObjectMapping*)objectMapping;
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/**
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Returns all object mappings registered for a particular class on the provider. The collection of mappings is assembled
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by searching for all mappings added via addObjctMapping: and then consulting those registered via objectMappingForKeyPath:
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*/
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- (NSArray*)objectMappingsForClass:(Class)theClass;
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/**
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Returns the first object mapping for a particular class in the provider. Mappings registered via addObjectMapping: take
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precedence over those registered via setObjectMapping:forKeyPath:
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*/
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- (RKObjectMapping*)objectMappingForClass:(Class)theClass;
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/**
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Set a mapping to serialize objects of a specific class into a representation
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suitable for transport over HTTP. Used by the object manager during postObject: and putObject:
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*/
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- (void)setSerializationMapping:(RKObjectMapping *)mapping forClass:(Class)objectClass;
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/**
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returns the serialization mapping for a specific object class
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which has been previously registered.
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*/
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- (RKObjectMapping*)serializationMappingForClass:(Class)objectClass;
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@end
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