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b246559112
Given the updates to the managed object store configuration patterns, it makes much more sense for primary key configuration to be done against a mutable entity rather than having the fall-back onto an associative object.
100 lines
3.4 KiB
Objective-C
100 lines
3.4 KiB
Objective-C
//
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// NSEntityDescription+RKAdditions.m
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// RestKit
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//
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// Created by Blake Watters on 3/22/12.
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// Copyright (c) 2009-2012 RestKit. All rights reserved.
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//
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#import <objc/runtime.h>
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#import "NSEntityDescription+RKAdditions.h"
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NSString * const RKEntityDescriptionPrimaryKeyAttributeUserInfoKey = @"primaryKeyAttribute";
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NSString * const RKEntityDescriptionPrimaryKeyAttributeValuePredicateSubstitutionVariable = @"PRIMARY_KEY_VALUE";
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static char primaryKeyPredicateKey;
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@implementation NSEntityDescription (RKAdditions)
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- (void)setPredicateForPrimaryKeyAttribute:(NSString *)primaryKeyAttribute
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{
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NSPredicate *predicate = (primaryKeyAttribute) ? [NSPredicate predicateWithFormat:@"%K == $PRIMARY_KEY_VALUE", primaryKeyAttribute] : nil;
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objc_setAssociatedObject(self,
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&primaryKeyPredicateKey,
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predicate,
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OBJC_ASSOCIATION_RETAIN);
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}
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#pragma mark - Public
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- (NSAttributeDescription *)primaryKeyAttribute
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{
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return [[self attributesByName] valueForKey:[self primaryKeyAttributeName]];
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}
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- (Class)primaryKeyAttributeClass
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{
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NSAttributeDescription *attributeDescription = [self primaryKeyAttribute];
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if (attributeDescription) {
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return NSClassFromString(attributeDescription.attributeValueClassName);
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}
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return nil;
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}
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- (NSString *)primaryKeyAttributeName
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{
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NSString *primaryKeyAttribute = [self.userInfo valueForKey:RKEntityDescriptionPrimaryKeyAttributeUserInfoKey];
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// If we have loaded from the user info, ensure we have a predicate
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if (! [self predicateForPrimaryKeyAttribute]) {
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[self setPredicateForPrimaryKeyAttribute:primaryKeyAttribute];
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}
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return primaryKeyAttribute;
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}
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- (void)setPrimaryKeyAttributeName:(NSString *)primaryKeyAttributeName
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{
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NSMutableDictionary *userInfo = [self.userInfo mutableCopy];
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[userInfo setValue:primaryKeyAttributeName forKey:RKEntityDescriptionPrimaryKeyAttributeUserInfoKey];
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[self setUserInfo:userInfo];
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}
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- (NSPredicate *)predicateForPrimaryKeyAttribute
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{
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return (NSPredicate *)objc_getAssociatedObject(self, &primaryKeyPredicateKey);
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}
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- (id)coerceValueForPrimaryKey:(id)primaryKeyValue
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{
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id searchValue = primaryKeyValue;
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Class theClass = [self primaryKeyAttributeClass];
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if (theClass) {
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// TODO: This coercsion behavior should be pluggable and reused from the mapper
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if ([theClass isSubclassOfClass:[NSNumber class]] && ![searchValue isKindOfClass:[NSNumber class]]) {
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// Handle NSString -> NSNumber
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if ([searchValue isKindOfClass:[NSString class]]) {
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searchValue = [NSNumber numberWithDouble:[searchValue doubleValue]];
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}
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} else if ([theClass isSubclassOfClass:[NSString class]] && ![searchValue isKindOfClass:[NSString class]]) {
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// Coerce to string
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if ([searchValue respondsToSelector:@selector(stringValue)]) {
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searchValue = [searchValue stringValue];
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}
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}
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}
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return searchValue;
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}
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- (NSPredicate *)predicateForPrimaryKeyAttributeWithValue:(id)value
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{
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id substitutionValue = [self coerceValueForPrimaryKey:value];
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NSDictionary *variables = [NSDictionary dictionaryWithObject:substitutionValue
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forKey:RKEntityDescriptionPrimaryKeyAttributeValuePredicateSubstitutionVariable];
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return [[self predicateForPrimaryKeyAttribute] predicateWithSubstitutionVariables:variables];
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}
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@end
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